Cellular Network Interface (CNI)

Models GSM18, GSM20 and CDMA18

with SMS Relay Modem option

User’s Guide

TX

DA

TA

CO

NN

EC

T

NE

TW

OR

K

STATUS

ON

SIG

NA

L

RX

DA

TA

Document: 900354 Revision: A March, 2005

ii

WARNING This product contains a radio-frequency transmitter,

Motorola Model g18, FCC ID # IHDT6AC1, Motorola Model g20, FCC ID # IHDT56DB1 or Motorola Model c18, FCC ID # IHDT56CW1.

The combined cable loss and antenna gain must not exceed 6.1dBi

gain, and the antenna installation must provide a minimum separation distance of 20cm (8”) from users and nearby persons and must not be collocated or operating in conjunction with any other antenna or

transmitter.

See Chapter-7 for more safety information.

WARNING No hazardous area safety approvals have been

received for this product. It is therefore necessary to ensure that the product is only installed at locations that are classified as ‘safe area’ sites.

See Chapter-7 for more safety information.

COPYRIGHT 2004 by Metretek, Incorporated All rights to this document, domestic and international, are reserved by Metretek, Incorporated. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of Metretek, Incorporated. Requests for permission to reproduce or distribute this manual should be addressed to:

METRETEK, INCORPORATED 300 NORTH DRIVE

MELBOURNE, FLORIDA, USA 32934

iii

COMMON QUESTIONS

What is a Cellular Network Interface? Traditionally remote data collection and control systems have used wired phone lines and modems to communicate with a central computer. Wireless technologies such as private radio systems, leased satellite links and analog cellular service have also been used with success. But the increasing cost of wired service and the discontinuation of some forms of wireless service, such as analog cellular, are forcing businesses to replace entire systems simply because the communications environment has changed. Metretek’s Cellular Network Interface (CNI) and an application program called InvisiConnect offer a way to use newer digital cellular networks and the Internet to provide a reliable, cost effective and seamless communications path between existing equipment in the field and the central computer. Few if any changes are required to the existing field equipment or to the existing application program and computer. What does an SMS Relay Modem do? In a traditional wired modem setup the central computer can usually contact the remote device directly by dialing its phone number. On the Internet there are servers and clients. A server is usually a computer system that is always running and always “listening” for connection requests from clients. A CNI acts as a client and the computer running InvisiConnect is the server. Being a client a CNI cannot be directly contacted via the Internet. However a CNI can be “paged”. The page then causes the CNI to call back immediately to InvisiConnect. This process closely emulates a wired dial-out to the remote device. One method of paging is by Short Message Service, or SMS. SMS is often used to send short text messages between two cellular phones. In some cases a message can be sent from a computer using a traditional SMTP (email) server. InvisiConnect can be configured to send SMS messages to CNI devices using either a cellular modem or an SMTP server. But there may be obstacles to sending an SMS. First, the computer running InvisiConnect may not have access to an SMTP server. Or if the computer is using a cellular modem to connect to the Internet, it may not be able to send SMS messages without first terminating the Internet connection. Finally, for security reasons, some cellular providers only allow SMS messages to be exchanged between two mobile devices, and not between a mobile device and an SMTP server. The SMS Relay Modem is a special configuration of a CNI. Its sole purpose is to allow InvisiConnect to send mobile-to-mobile SMS messages via the cellular network without interfering with existing Internet connections or the need for an SMTP server.

Any model of the Cellular Network Interface is simply referred to as the “CNI” throughout this document.

iv

Does the CNI use a cell phone? The cellular radio module is similar to that used in a digital cellular phone, but there is no display, keypad, speaker or microphone. Instead it has a communications port that allows the CNI’s processor to control the radio and use it as a wireless modem. Also, the radio is designed for more severe environmental conditions than a commercial cell phone. There are references within this document to “mobile” devices because the cellular radio system was intended to support portable phones and equipment. Though the CNI is normally installed in a fixed location, it is still classified as a “mobile” device. How is the CNI packaged? In its simplest form the CNI is a small circuit board assembly containing a processor, memory, a serial communications port, a cellular radio module and an antenna. Various mounting holes are provided to accommodate different mounting arrangements. This device requires an external dc power source in the range of 9 to 28 volts. Metretek also offers an inexpensive enclosure that can be mounted to a wall and provides adequate protection from common environmental conditions. Also available are a power supply and a PC interface cable. Chapter-2 has more information about these options. Does it matter where the CNI is installed? Yes. When used as an SMS Modem the CNI is usually located indoors near the computer that is running InvisiConnect. And the CNI will have the same problems as other cell phones with respect to signal strength, metal buildings, etc. For outdoor applications the CNI should be mounted inside an enclosure that can withstand wide variations in temperature and humidity, as well as provide protection from insects and direct contact with water. Since the CNI contains its own antenna, metal enclosures cannot be used because they will block the radio signals. However, an external antenna can be used in applications that require metal enclosures, or in areas in which the radio signals are weak. Chapter-2 has more information. Is the CNI ready to use immediately? No, there are five important steps before the CNI can be put into service:

1) The CNI should be mounted in a protective enclosure that provides protection from insects and direct contact with water. Metal enclosures will require the use of an external antenna.

2) The computer’s serial port must be wired to the CNI (Chapter-2). 3) You must purchase cellular phone service (Chapter-3). 4) You must configure the CNI using a computer and a special program and cable from

Metretek (Chapter-4). 5) There are several simple parameters in InvisiConnect that need to be defined with

respect to the communications port on the computer (Chapter-5).

v

How do I purchase cellular service? As with any cellular phone, you must purchase cellular service. There are several different digital technologies used today, and the service providers may support one or several of them. When you purchase a personal cell phone, you generally choose a provider that has the best calling plan and coverage in the area you live or work. You then receive a phone that works with their technology. In the case of the CNI you are purchasing the equipment elsewhere and simply purchasing the service. The CNI is designed to support either GSM or CDMA technology. Chapter-3 will help with the selection process.

Why must the CNI be configured? The CNI is capable of operating on a number of GSM or CDMA networks throughout the world. Several parameters are needed that are unique to the service provider. The CNI is configured using your computer and a special cable and software supplied by Metretek. This can be done any time before, during or after installation. Chapter-4 has much more information.

vi

vii

TABLE OF CONTENTS

1 PRODUCT DESCRIPTION ....................................................................................1-1 1.1 Purpose of a Cellular Network Interface.........................................................1-1 1.2 Purpose of an SMS Relay Modem .................................................................1-2

2 INSTALLATION.....................................................................................................2-1 2.1 Unpacking, Damage reports, Item List ...........................................................2-1 2.2 Additional Items Required for Installation.......................................................2-1 2.3 Site Selection for Best Performance ..............................................................2-2 2.4 Model GSM18 Layout.....................................................................................2-4 2.5 Model GSM20 Layout.....................................................................................2-5 2.6 Model CDMA18 Layout ..................................................................................2-6 2.7 CNI Block Diagram.........................................................................................2-7 2.8 Circuit Board Dimensions and Mounting Hole Pattern ...................................2-8 2.9 Power Supply Requirements..........................................................................2-9 2.10 Connection to a Computer ...........................................................................2-10 2.11 Optional Enclosure .......................................................................................2-11 2.12 External Antenna Kit.....................................................................................2-12 2.13 Quick Power-Up Check ................................................................................2-14

3 CELLULAR SERVICE ...........................................................................................3-1 3.1 GSM Service ..................................................................................................3-1

3.1.1 GSM Overview .......................................................................................3-1 3.1.2 Establishing Cellular Service for GSM....................................................3-1 3.1.3 SIM Card Installation for the GSM18......................................................3-2 3.1.4 SIM Card Installation for the GSM20......................................................3-3

3.2 CDMA Service................................................................................................3-4 3.2.1 CDMA Overview .....................................................................................3-4 3.2.2 Establishing Cellular Service for CDMA .................................................3-4 3.2.3 Over-the-Air Activation ...........................................................................3-4

4 CONFIGURATION USING METRETEK PROGRAMMER ....................................4-1 4.1 Metretek Programmer Cable ..........................................................................4-1 4.2 MP32 Software Startup ..................................................................................4-1 4.3 Main Configuration Screen.............................................................................4-3

4.3.1 Remote Unit ID .......................................................................................4-4 4.3.2 Destination..............................................................................................4-4 4.3.3 Originate Calls ........................................................................................4-4 4.3.4 Maintain Internet Connection..................................................................4-4 4.3.5 Respond to Voice Calls ..........................................................................4-4 4.3.6 Respond to SMS ....................................................................................4-4 4.3.7 Dual Port.................................................................................................4-4 4.3.8 Firmware Version ...................................................................................4-4 4.3.9 Primary Call Retry Rate..........................................................................4-4 4.3.10 Primary Call Retry Count........................................................................4-4 4.3.11 Secondary Call Retry Interval.................................................................4-4 4.3.12 Alarm Input 1 & 2....................................................................................4-4

4.4 Serial Port-1 Screen .......................................................................................4-5 4.4.1 Port Select ID .........................................................................................4-5 4.4.2 Max BPS.................................................................................................4-5 4.4.3 Flow Control ...........................................................................................4-5 4.4.4 Wait __ ms before sending packets ......................................................4-5

viii

4.4.5 Maximum Packet Size ............................................................................4-6 4.4.6 Data Bits .................................................................................................4-6 4.4.7 Parity Type .............................................................................................4-6 4.4.8 Stop Bits .................................................................................................4-6 4.4.9 Always Send Connect Message.............................................................4-6 4.4.10 Always “RING” Port ................................................................................4-6 4.4.11 Use Non-verbose Result Codes .............................................................4-6 4.4.12 Edit CONNECT Message .......................................................................4-6

4.5 Serial Port-2 Screen .......................................................................................4-6 4.6 Cellular Settings Screen.................................................................................4-7

4.6.1 Service Type...........................................................................................4-8 4.6.2 PIN Number (GSM Only)........................................................................4-8 4.6.3 Frequency (GSM18 only) .......................................................................4-8 4.6.4 OTA Programming Number (CDMA only) ..............................................4-8

4.7 Programming the CNI.....................................................................................4-9 5 CONFIGURATION OF INVISICONNECT ...........................................................5-1

5.1 How is the SMS Relay Modem Used .............................................................5-1 5.2 InvisiConnect Configuration.........................................................................5-1

5.2.1 External IP Address................................................................................5-2 5.2.2 Server Configuration and Control ...........................................................5-2 5.2.3 User Application Interface ......................................................................5-3 5.2.4 IP Port Number.......................................................................................5-3 5.2.5 Server Description ..................................................................................5-3 5.2.6 Auto Start Server At Startup ...................................................................5-3

5.3 SMS/USSD Configuration ..............................................................................5-4 5.3.1 Enable SMS / USSD...............................................................................5-5 5.3.2 Use Attached Cellular Modem................................................................5-5

5.3.2.1 Cellular Modem Com Port ..................................................................5-5 5.3.2.2 Flow Control .......................................................................................5-5 5.3.2.3 Baud Rate...........................................................................................5-5 5.3.2.4 Data Bits .............................................................................................5-5 5.3.2.5 Stop Bits .............................................................................................5-5 5.3.2.6 Parity ..................................................................................................5-5 5.3.2.7 Keep COM Port Open ........................................................................5-5 5.3.2.8 Use Send-Only Option........................................................................5-5 5.3.2.9 Modem Reset and Initialization Strings ..............................................5-5

5.3.3 SMS / USSD Prefix and Suffix................................................................5-5 5.3.4 Override Call-Back IP Address...............................................................5-6

5.4 Saving and Loading Configurations ...............................................................5-6 5.5 Normal InvisiConnect Operation and Indicators ..........................................5-6

6 MODES OF OPERATION......................................................................................6-1 6.1 Startup Behavior.............................................................................................6-1 6.2 Over-the-Air Activation (CDMA18 only)..........................................................6-1

7 SAFETY, HAZARDOUS AREAS, ESD PRECAUTIONS ......................................7-1 8 TECHNICAL SPECIFICATIONS ...........................................................................8-1 9 WARRANTY INFORMATION ................................................................................9-1

ix

LIST OF TABLES

CNI Circuit Board Jumper Configuration........................................................................2-7 External Antenna Kits ..................................................................................................2-12

LIST OF FIGURES

Traffic Display System using the Internet ......................................................................1-3 Metretek Programmer Cable..........................................................................................2-1 Primary Components of the Model GSM18 ...................................................................2-4 Primary Components of the Model GSM20 ...................................................................2-5 Primary Components of the Model CDMA18.................................................................2-6 Block Diagram of the CNI ..............................................................................................2-7 CNI Physical Dimensions...............................................................................................2-8 Power Supply Connection..............................................................................................2-9 Connecting the CNI to a Computer ..............................................................................2-10 Metretek CNI-to-Computer Cable ................................................................................2-10 Optional Enclosure.......................................................................................................2-11 External Antenna Connections ....................................................................................2-12 Remote Antenna Connection.......................................................................................2-13 SIM Card Profile.............................................................................................................3-1 GSM18 SIM Card Holder Location ................................................................................3-2 GSM20 SIM Card Installation ........................................................................................3-3 MP32 Login Screen .......................................................................................................4-1 MP32 Start-Up Screen...................................................................................................4-2 Communication Port Configuration Screen....................................................................4-2 Main Configuration Screen ............................................................................................4-3 Screen Image with “Serial Port 1” Tab Selected............................................................4-5 Screen Image with the “Cellular Settings” Tab Selected................................................4-7 InvisiConnect Main Screen .........................................................................................5-2 Server Configuration Screen..........................................................................................5-3 SMS/USSD Settings Screen..........................................................................................5-4 CNI’s LED Indicators......................................................................................................6-1

x

1-1

1 PRODUCT DESCRIPTION

1.1 Purpose of a Cellular Network Interface There are thousands of remote electronic devices installed around the world that communicate with central computers to report alarm conditions, unload collected data and receive new instructions. Examples include traffic control systems, gas, water and power meters, irrigation controllers and security systems. In many cases these devices contain internal modems connected to traditional wired phone lines. At the central office other modems connect to a central computer and a specific application program controls the entire operation. In very remote locations the cost of running phone lines over long distances can be quite high. The monthly cost of wired phone service continues to increase, and in some hazardous areas telephone lines are not permitted at all. Several wireless solutions are also available. Private radio systems have been used but the initial purchase price is high and the range of operation may be limited. Analog cellular phone service has been used to exchange modem signals in much the same way as it does with voice signals. Another method was developed call CDPD, which is a method of transferring digital information in packets over an analog cellular network. However the limited capacity of analog cellular technology has led to the development of digital methods to increase capacity and provide new features. Some service providers have discontinued or greatly decreased the availability of analog cellular service. Metretek’s Cellular Network Interface, or CNI, was specifically designed to address these problems. Operating as a wireless transparent modem, the connection is made using commercial digital cellular GSM or CDMA phone networks. The Model GSM18 supports 900 / 1800 / 1900 MHz GSM, used throughout most of the world. The GSM20 offers GSM support for either the 850 / 1900 MHz or 900 / 1800 MHz bands. Both models can make a circuit-switched data (CSD) connection to another modem, or a general packet radio service (GPRS) connection to an Internet server. The Model CDMA18 supports 850 & 1900 MHz CDMA service. It can make a circuit-switched data (CSD) connection to another modem, or a single carrier, radio transmission technology (1XRTT) connection to an Internet server. Nearly any device that has a serial RS-232 port can be connected to the CNI. A minimum of three wires is needed to carry data between the two units. Baud rates from 300 to 38400 are supported with hardware and software handshaking. The CNI can emulate a traditional “AT” modem if the user’s equipment is expecting a modem to be present. On the computer end is a special application program called InvisiConnect. Your original application program is probably expecting to communicate with a modem attached to a communications port on the computer. InvisiConnect has two major functions. First, it is a communications port emulator that allows your application program to work as it did before, even though there is no physical port or modem

Any model of the Cellular Network Interface is simply referred to as the “CNI” throughout this document.

1-2

present. Second, InvisiConnect communicates with the CNI over the Internet using digital cellular technology as the data link. The link between the remote device and your application program is nearly identical to a traditional modem setup, and neither end knows the difference. 1.2 Purpose of an SMS Relay Modem In a traditional wired modem setup the central computer can usually contact the remote device directly by dialing its phone number. On the Internet there are servers and clients. A server is usually a computer system that is always running and always “listening” for connection requests from clients. When you use your personal computer to access a website your PC is the client and the website is the server. A CNI acts as a client and the computer running InvisiConnect is the server. A client cannot be directly contacted via the Internet. However the CNI can be “paged”. The page then causes the CNI to call back immediately to InvisiConnect. This process closely emulates a wired dial-out to the remote device. One method of paging is by Short Message Service, or SMS. SMS is often used to send short text messages between two cellular phones. In some cases a message can be sent from a computer using a traditional SMTP (email) server. InvisiConnect can be configured to send SMS messages to CNI devices using either a cellular modem or an SMTP server. But there may be obstacles to sending an SMS. First, the computer running InvisiConnect may not have access to an SMTP server. Or if the computer is using a cellular modem to connect to the Internet, it may not be able to send SMS messages without first terminating the Internet connection. Finally, for security reasons, some cellular providers only allow SMS messages to be exchanged between two mobile devices, and not between a mobile device and an SMTP server. The SMS Relay Modem is a special configuration of a CNI. Its sole purpose is to allow InvisiConnect to send mobile-to-mobile SMS messages via the cellular network without interfering with existing Internet connections. Figure 1-1 is a simplified illustration of a typical application.

1-3

Figure 1-1

Traffic Display System using the Internet

1-4

2-1

2 INSTALLATION 2.1 Unpacking, Damage reports, Item List Upon receipt, inspect the CNI for any potential shipping damage. If any damage is detected that can be attributed to the way the package was handled, then a claim should be filed with the shipping agent as quickly as possible. A typical CNI is provided with the following items:

• The Model GSM18, GSM20 or CDMA18 Cellular Network Interface card • “SMS Relay Modem” firmware option • Antenna • Motorola g18, g20 or c18 cellular radio module • Optional enclosure (Metretek stock # 8140-0316) • Optional power supply (Metretek stock # 5950-0126) • Optional PC interface cable (Metretek stock # 1002-0322) • Manual 900354 (this document). Normally only one manual is included with each

shipment rather than with each unit. Additional manuals can be ordered separately or obtained in PDF file format upon request.

Note: The items listed above may vary depending on what was requested with the original purchase order. Refer to the shipping document or the purchase order for a precise record when inspecting the package contents. 2.2 Additional Items Required for Installation Several additional tools and items will be required before proceeding with the field site installation. These are: Equipment available from Metretek:

• PC-to-serial link (Metretek programmer cable) as illustrated in Figure 2-1. Metretek stock # 1002-0209B-001.

• MP-32 programmer software application program, Metretek stock # 100160.

Figure 2-1

Metretek Programmer Cable

2-2

Common “off-the-shelf” items required for installation:

• ‘x86 or Pentium class laptop computer for configuration of the CNI. The operating system must be Microsoft Windows-98 or newer. The computer must have a serial port available.

• An activated SIM card to enable the GSM cellular radio module. This must be

obtained from the cellular service provider. Refer to Chapter-3 for additional details regarding SIM card activation. CDMA does not require a SIM card but an account must be established before the radio can be activated.

2.3 Site Selection for Best Performance

WARNING No hazardous area safety approvals have been

received for this product. It is therefore necessary to ensure that the product is only installed at locations that are classified as ‘safe area’ sites.

See Chapter-7 for more safety information.

Field site selection for a cellular communications product requires additional consideration with regard to antenna placement.

• Ensure that the antenna is pointing in a vertical direction.

• Raise the elevation as high as practical from the ground.

• Avoid mounting the unit to the side of a metal shed or similar structure since metal is a very effective shield against the desired rf signal.

• Avoid mounting the product in a location where the antenna is in close proximity

to a measurement instrument such as a Rosemont transducer. The strong R.F. field from the cellular module transmitter could possibly degrade the accuracy of these precision instruments.

Depending on the signal strength for a given location, it may be possible to violate some of these suggestions and still obtain good performance. This will vary from one site to the next, just as the reception quality of a handheld cellular phone will vary. The CNI is provided with several antenna options. If the antenna provided does not provide adequate performance, a different antenna can be used as long as it complies with the impedance and frequency range of the cellular radio module. For instance,

2-3

the CNI may be located in a metal building but a mobile antenna, such as the type that would mount to the roof of a vehicle, may be located outside of the building.

WARNING This product contains a radio-frequency transmitter,

Motorola Model g18, FCC ID # IHDT6AC1, Motorola Model g20, FCC ID # IHDT56DB1 or Motorola Model c18, FCC ID # IHDT56CW1.

The combined cable loss and antenna gain must not exceed 6.1dBi

gain, and the antenna installation must provide a minimum separation distance of 20cm (8”) from users and nearby persons and must not be collocated or operating in conjunction with any other antenna or

transmitter.

See Chapter-7 for more safety information.

2-4

2.4 Model GSM18 Layout The Model GSM18 circuit board assembly is shown in Figure 2-2.

Figure 2-2

Primary Components of the Model GSM18

2-5

2.5 Model GSM20 Layout The Model GSM20 circuit board assembly is shown in Figure 2-3.

Figure 2-3

Primary Components of the Model GSM20

2-6

2.6 Model CDMA18 Layout The Model CDMA18 circuit board assembly is shown in Figure 2-4.

Figure 2-4

Primary Components of the Model CDMA18

2-7

Various jumpers exist on the CNI board to enable different operating modes and options. Table 2-1 lists these jumpers and their purpose. JUMPER POSITION NOTES

J2 OPEN This is used in other versions of the CNI and has no function when the CNI is used as an SMS Relay Modem.

JP3 A-B For applications that require the DSR control line to have RS-232 voltage levels (± 9V). This is not important when the CNI is used as an SMS Relay Modem.

JP3 B-C For applications that require the DSR control line to have +5V and 0V voltage levels. This is not important when the CNI is used as an SMS Relay Modem.

JP4 OPEN Momentary short will reset unit and clear data memory JP7 OPEN Used for factory testing

Table 2-1

CNI Circuit Board Jumper Configuration 2.7 CNI Block Diagram

Figure 2-5 Block Diagram of the CNI

2-8

2.8 Circuit Board Dimensions and Mounting Hole Pattern For outdoor applications the CNI should be mounted inside a weatherproof enclosure. Critical components and connections are conformal coated to resist humidity, but direct contact with water or any other liquid must be avoided. Protection against insects and rodents is also required. See Figure 2-6 for dimensional information and hole spacing.

Figure 2-6 CNI Physical Dimensions

IMPORTANT NOTE

The lower right-hand mounting hole is located directly under the radio or the SIM card holder. A standoff or fastener that protrudes through this hole will damage

the assembly.

2-9

2.9 Power Supply Requirements The CNI can be powered from one single filtered dc power supply in the range of 9 to 28 volts dc at 750 milliamps minimum. Most current is drawn by the cellular radio. For the GSM18 and GSM20 the average current is 300 milliamps, but peak currents can be as high as 1.8 amps for a duration of 0.5 milliseconds every 4.5 milliseconds. For the CDMA18 the average current is about 800 mA. This connection is made at the TB2 terminal block. Be certain to observe proper polarity when connecting the power source. Connect the positive (+) side to the “Vbat” input and the negative (-) input to “GND”. The input is reverse-polarity protected. Metretek offers a wall-mount supply under stock #5950-0126. This is a 15Vdc, 2 amp filtered supply with an input range of 100 – 240 VAC.

Figure 2-7

Power Supply Connection

2-10

2.10 Connection to a Computer The computer running InvisiConnect must have an unused serial port. Only three lines are required for this connection: a line to transmit data to the CNI, one to receive data from the CNI, and common. This is shown in Figure 2-8. A pre-assembled cable is available from Metretek under stock #1002-0322. This is shown in Figure 2-9.

Figure 2-8

Connecting the CNI to a Computer

Figure 2-9 Metretek CNI-to-Computer Cable

2-11

2.11 Optional Enclosure Metretek offers the enclosure shown in Figure 2-10 under stock #8140-0316. One or two cable connectors can be installed in the bottom of the enclosure to provide strain relief for cables as well as a protection from insects and moisture in outdoor applications.

TX

DA

TA

CO

NN

EC

T

NE

TW

OR

K

STATUS

ON

SIG

NA

L

RX

DA

TA

Figure 2-10 Optional Enclosure

2-12

2.12 External Antenna Kit The CNI may be provided with a rigid internal antenna or a flexible external antenna. If the unit is moved to another region, or a different cellular provider is chosen at a later time, it may be necessary to change to a different frequency and therefore a different antenna. Four external antenna kits are available depending upon the cellular frequency. Use Table-2-2 to order a different antenna kit.

Metretek Stock # Frequency Usage

1014-0042-004 850 MHz CDMA and GSM 1014-0042-001 900 MHz GSM 1014-0042-002 1800 MHz GSM 1014-0042-003 1900 MHz CDMA and GSM

Table 2-2

External Antenna Kits

Each model of the CNI uses a different radio. Although all radios use the same type of MMCX connector, they are located in different positions. Figure 2-11 illustrates this difference. Please note that the c18 CDMA radio has two connectors. It is important to install the cable into the right-hand connector.

Figure 2-11

External Antenna Connections

2-13

An antenna kit consists of a short coaxial cable and an antenna. It is also possible to use another antenna that has a male “SMA” connector, has 50-ohm impedance and matches the frequency range listed in the specifications (Chapter-8). For instance the CNI might be located in your computer center but the antenna may be located on the roof.

Figure 2-12 Remote Antenna Connection

2-14

2.13 Quick Power-Up Check Connect the external power supply to TB2. Turn on the power. The green “PROGRAM MONITOR” light should light solidly. The red “RECEIVE DATA” light should light momentarily, then go out. The green “PROGRAM MONITOR” light should then start flashing once per second. This indicates the CNI is running. Turn off power for now until it is time to configure the board (see Chapter-4).

3-1

3 CELLULAR SERVICE 3.1 GSM Service 3.1.1 GSM Overview GSM is an abbreviation for Global System for Mobile communications. This communications standard is widely used throughout Europe, Africa, Asia and parts of North and South America. Messages are digitized into packets and sent in brief bursts during allocated time slots using a variation of TDMA (Time Division Multiple Access) techniques. Up to 8 cellular phones can thus share the same frequency band, which in turn permits the system to support more users with existing equipment. Efficient utilization of spectrum is an important consideration for service providers since there is only a limited bandwidth space that has been allocated to cellular phone service. Most GSM systems throughout the world operate on either the 900 MHz or 1800 MHz communications bands. In North America most GSM systems operate on the 1900 MHz band. Many older 850 MHz TDMA networks in North America are now being converted for GSM service. The GSM20 covers both the 850 and 1900 MHz bands. 3.1.2 Establishing Cellular Service for GSM A cellular account must be activated with a cellular service provider prior to placing a CNI into service. For the SMS Modem it is not necessary to purchase Internet or circuit-switched data (CSD) service. A simple voice plan will do but it must support Short Message Service (SMS). Standard voice plans often come with a limited number of SMS messages that can be sent to another phone each month. Once this limit is exceeded you will pay an extra charge for each additional message. In this application it may be necessary to greatly increase this limit or upgrade to an unlimited plan in order to reduce costs. This will depend on your application. Since the cellular service provider is not supplying the equipment it may be necessary to tell the provider that this is a Metretek “CNI / GSM18” or “CNI / GSM20”. They may also request a serial number that is printed on the radio’s label, such as an “IMEI”, “MSM” or “ESN”. After the GSM account has been established, the cellular service provider will provide a small memory card known as a SIM card (Subscriber Identity Module). Figure 4-1 illustrates the appearance of a SIM card.

Figure 4-1

SIM Card Profile

3-2

3.1.3 SIM Card Installation for the GSM18 For the GSM18 the cellular radio has a built-in SIM card holder located on the bottom of the radio. Care must be exercised to ensure that the electrical contacts of the SIM card will mate properly with the electrical contacts on the radio module. Figure 4-2 illustrates the location of the holder. Note the location of the notched corner on the SIM card.

Never install a SIM card when power is present.

Figure 4-2 GSM18 SIM Card Holder Location

3-3

3.1.4 SIM Card Installation for the GSM20 The SIM card holder for the GSM20 is located on the CNI board, near the radio. See Figure 4-3.

Never install a SIM card when power is present.

Figure 4-3

GSM20 SIM Card Installation

3-4

3.2 CDMA Service 3.2.1 CDMA Overview CDMA is an abbreviation for Code Division Multiple Access communications. CDMA technology was originally developed for military applications but was eventually commercialized. This communications standard is widely used in North America and in some parts of Asia and South America. Rather than dividing calls into time slots like GSM, CDMA allows all users to transmit at the same time. Each call is accompanied by a unique digital code that allows it to be differentiated from the rest. As an analogy suppose you are in a crowded room and many conversations are taking place at the same time. Your brain is able to distinguish the conversation you are having with your friend because it is able to focus on your friend’s voice characteristics. As the room grows more crowded each person must talk louder and the size of the conversation “zone” grows smaller. You may have to move closer to your friend to keep the conversation going. Thus the number of conversations is limited by the overall interference and noise in the room. Likewise there is a limit to the number of calls that can be carried at the same time on a CDMA network. 3.2.2 Establishing Cellular Service for CDMA A cellular account must be activated with a cellular service provider prior to placing a CNI into service. For the SMS Modem it is not necessary to purchase Internet or circuit-switched data (CSD) service. A simple voice plan will do but it must support Short Message Service (SMS). Standard voice plans often come with a limited number of SMS messages that can be sent to another phone each month. Once this limit is exceeded you will pay an extra charge for each additional message. In this application it may be necessary to greatly increase this limit or upgrade to an unlimited plan in order to reduce costs. This will depend on your application. Since the cellular service provider is not supplying the equipment it may be necessary to tell the provider that this is a Metretek “CNI / CDMA18. They may also request a serial number that is printed on the radio’s label, such as an “IMEI”, “MSM” or “ESN”. 3.2.3 Over-the-Air Activation Unlike GSM, CDMA technology does not support the use of a SIM card (Subscriber Identity Module) to hold and transport account information. Therefore the account information must be downloaded into the cellular radio’s own memory. This is usually accomplished by dialing a special phone number to request “over-the-air activation” (OTAA). The activation phone number is specific to the service provider and must be programmed into the CNI using the MP32 configuration software (Chapter-4).

3-5

The OTAA process does two things. First, if this is the very first OTAA call, a new phone number is programmed into the phone. It also starts the account billing process. Second, a “preferred roaming list” (PRL) is downloaded into the phone. This instructs the radio which service provider(s) to search for and connect to. If the CNI sees that the radio’s phone number contains all zeros then the activation number is dialed and over-the-air activation is attempted. This also happens automatically whenever the unit is reset and then every 7 days thereafter. The reason for this is that cellular service providers often make arrangements with other providers to carry calls in areas where their own equipment and towers do not exist. These agreements allow the call to be forwarded at no additional charge. The preferred roaming list says that it is acceptable to connect with these carriers. However at some point your service provider may install new equipment in these areas, and the contract with the partner may be terminated. In this new situation roaming fees will be added to each call if the radio is allowed to connect to the other carriers. This is why it is important to periodically update the PRL. The OTAA call process is discussed in more detail in Chapter-6.

3-6

4-1

4 CONFIGURATION USING METRETEK PROGRAMMER 4.1 Metretek Programmer Cable Before placing a CNI into service, it is necessary to setup certain configuration parameters. Setting up the configuration requires a computer, Metretek programmer (MP32) software and a special programming cable. These items are listed below:

• 80x86 or Pentium-based personal computer with an available 9-pin serial port

(COM1, COM2). Minimum operating system is Windows 98.

• Windows-based Metretek Programmer software, “MP32”, available under Metretek P/N: 100160. The “MP32” software must be version 3.1.0 or later.

• PC-to-Remote Interface cable, Metretek P/N 1002-0209B-001. An illustration of

the cable assembly was provided in Chapter-2, Figure 2-1. The CNI stores configuration information in its non-volatile memory. This information is not lost when power is removed or the unit is reset. Certain parameters are unique to each CNI, such as cellular service details. These parameters can be programmed prior to, during, or after installation of the device in the field, although it is normally most convenient to setup and test the configuration prior to installation. 4.2 MP32 Software Startup When MP32 is started it will require a user name and password. Use the default User Name and leave the password blank.

Figure 4-1 MP32 Login Screen

After login a window will appear to allow you to select the type of Metretek device to program (Figure 4-2). Prior to selecting the device, select the “Communication Configuration” button. In the next window (Figure 4-3) select the “Cable Comm Port” as the default, and make sure that the selected port matches the port that the cable is plugged into on the computer, such as COM1, COM2, etc. Then select the “OK” button.

4-2

Figure 4-2 MP32 Start-Up Screen

Figure 4-3 Communication Port Configuration Screen

4-3

4.3 Main Configuration Screen The original MP32 screen will now reappear (Figure 4-2). Select the “GSM18/GSM20/CDMA18 – CNI” button to start the configuration process. The next screen will appear:

Figure 4-4 Main Configuration Screen

A configuration can be saved for future use by using the FILE pull-down menu in the upper left-hand corner of the screen. A previously saved configuration can be opened in the same manner. This is useful when several units are to be programmed with similar information. To start a session either OPEN a previously saved configuration or perform a READ operation with the cable installed and the unit powered up. If the CNI is busy it may take up to 20 seconds to respond, so please be patient. The status of the operation is displayed on the bottom of the screen. The CANCEL button will terminate the session in the event there is no response.

4-4

4.3.1 Remote Unit ID This is only used for standard CNI applications and does not need to be changed. 4.3.2 Destination This is only used for standard CNI applications and does not need to be changed. 4.3.3 Originate Calls Check this box. 4.3.4 Maintain Internet Connection Uncheck this box. 4.3.5 Respond to Voice Calls Uncheck this box. 4.3.6 Respond to SMS Check this box. 4.3.7 Dual Port Uncheck this box. 4.3.8 Firmware Version The firmware version is a value that is updated on the screen whenever a ‘Read’ operation is performed. This is not a parameter that can be modified. 4.3.9 Primary Call Retry Rate This is only used for standard CNI applications and does not need to be changed. 4.3.10 Primary Call Retry Count This is only used for standard CNI applications and does not need to be changed. 4.3.11 Secondary Call Retry Interval This is only used for standard CNI applications and does not need to be changed. 4.3.12 Alarm Input 1 & 2 Select OFF for both inputs.

Many of the following configuration items apply to standard CNI applications and do not apply to the SMS Relay Modem.

4-5

4.4 Serial Port-1 Screen Select the SERIAL PORT 1 tab to continue the configuration.

Figure 4-5 Screen Image with “Serial Port 1” Tab Selected

4.4.1 Port Select ID The Port Select ID for Serial Port #1 defaults to the remote unit ID (RUID) that was assigned to the CNI. It is shown on the SERIAL PORT 1 tab for reference and cannot be changed. 4.4.2 Max BPS For the SMS Relay Modem you must select 9600 baud. 4.4.3 Flow Control For the SMS Relay Modem you must select “NONE”. 4.4.4 Wait __ ms before sending packets Enter 50 milliseconds.

4-6

4.4.5 Maximum Packet Size Enter 1400. 4.4.6 Data Bits For the SMS Relay Modem you must select 8. 4.4.7 Parity Type For the SMS Relay Modem you must select NONE. 4.4.8 Stop Bits For the SMS Relay Modem you must select 1. 4.4.9 Always Send Connect Message Uncheck this box. 4.4.10 Always “RING” Port Uncheck this box. 4.4.11 Use Non-verbose Result Codes Uncheck this box. 4.4.12 Edit CONNECT Message Uncheck this box. 4.5 Serial Port-2 Screen

Skip this screen.

4-7

4.6 Cellular Settings Screen Select the Cellular Settings tab to continue the configuration.

Figure 4-6 Screen Image with the “Cellular Settings” Tab Selected

4-8

4.6.1 Service Type One of two options can be selected, GSM (for the GSM18 or GSM20), or CDMA (for the CDMA18). 4.6.2 PIN Number (GSM Only) CDMA does not support the use of a PIN number. GSM cellular radios require a memory card called a SIM card (Subscriber Identity Module). This is issued to the cellular customer when the cellular service is purchased. A SIM holds information about the account so that certain services are made available to the customer such as Internet access. A SIM card can be moved to a different phone or radio, and the account information moves with it. Though convenient, this may encourage someone to remove the SIM card, insert it into his or her own cellular phone and make hundreds of hours of calls that will be billed to the owner of the card. A personal identification number (PIN) as an extra security measure to prevent unauthorized use of a SIM card. The PIN number can range from 1 to 8 numeric digits long and can be assigned by the cellular service provider when the card is activated.

NOTE If a PIN number is not used, leave the PIN Number field blank. Do not fill it with

0’s, because a 0 is a valid PIN digit. 4.6.3 Frequency (GSM18 only) The GSM20 and CDMA18 are able to automatically detect the operating frequency of the cellular provider. For the GSM18, depending upon the service provider chosen and the region of the world in which the CNI is located, there will be a specific frequency band used for the cellular service. These are generally 1900 MHz in North America, and 900 or 1800 MHz elsewhere. 4.6.4 OTA Programming Number (CDMA only) Unlike GSM radios, CDMA radios do not use SIM (Subscriber Identity Module) cards to hold account information. After purchasing CDMA service the radio must dial a special phone number to be activated and to have account information downloaded into the phone’s memory. This phone number is specific to the carrier and must be entered into the OTAA Programming Number slot in MP32. “OTAA” means over-the-air activation.

4-9

4.7 Programming the CNI

1) Attach the 9-pin D-sub end of the PC-to-Remote Interface cable to an available serial communications port on the computer, such as COM1.

2) Attach the opposite end of the interface cable to the 4-position connector (J8) on

the CNI board. The connector is keyed and can only insert in one direction.

3) Connect the lead acid battery’s cable to “J1” on the power supply board. The green “PROGRAM MONITOR” light should light solidly. The red “RECEIVE DATA” light should light momentarily, then go out. The green “PROGRAM MONITOR” light should then start flashing once per second. This indicates the CNI is running.

4) Once the parameters have been entered (or read in from a previously-saved

configuration file), select the PROGRAM button to start programming the CNI. Status messages will appear in the lower left-hand corner of the screen. If the CNI is busy with radio operations, it could take up to 30 seconds to respond to the program command. If communications cannot be established within several minutes, check your cable and serial port, and try again.

5) When programming has completed, unplug the 4-pin connector of the serial

cable from the “J8” connector on the CNI board. The CNI is now ready to be put into service.

4-10

5-1

5 CONFIGURATION OF INVISICONNECT

5.1 How is the SMS Relay Modem Used The SMS Relay Modem operates as a standard cellular modem for the sole purpose of sending SMS messages to other remote CNI devices. It is not used to make Internet connections. InvisiConnect has a feature called an SMS Relay Server. The following example illustrates its purpose: Your remote CNI devices normally calls in to the computer in your office. This computer uses the SMS Relay Modem to send SMS messages because it doesn’t have access to an SMTP (email) server. You’ve defined one server to answer the incoming calls from the remote devices. You’ve also defined an Echo / Relay server on the same machine. Now you need to travel to a different location and you take your laptop computer with you, along with a cellular modem. The laptop also runs InvisiConnect. You still need to communicate with the remote devices but you need them to call your laptop instead of the office computer. Since the laptop’s cellular modem is connecting to the Internet to process these calls, it can’t be used to send SMS messages. In this scenario you would configure your laptop’s InvisiConnect program to use the Echo / Relay server as your method of sending SMS messages. Each SMS message is sent to the Echo / Relay server at your office via the Internet. These messages are then forwarded to the CNI using the SMS Relay Modem. 5.2 InvisiConnect Configuration InvisiConnect acts as one or more Internet servers on your computer and thus must be allowed access to the outside world. Most corporate computer systems use firewall technology to prevent unauthorized and potentially damaging access from outside sources. An Internet address must be assigned to InvisiConnect, and a port number must be assigned for each running server. When InvisiConnect starts the following basic screen will appear.

Many of the features in InvisiConnect apply to standard CNI applications and do not apply to the SMS Relay Modem. Therefore only those features relating to the

SMS Relay Modem are discussed here. Refer to Metretek document 900343 for complete information about

InvisiConnect.

5-2

Figure 5-1 InvisiConnect Main Screen

5.2.1 External IP Address First, enter the external Internet (IP) address that was assigned to InvisiConnect. Your computer system’s administrator usually assigns this address.

5.2.2 Server Configuration and Control In the Server Configuration and Control section, select the “Add” button to define a new server or “Edit” to change one that is already defined. You can also delete an existing server using the “Delete” button.

NOTE A server must be stopped before changing it. Highlight the desired server, then select the “Start / Stop” button. Or select the “Stop All” button to halt all servers. If adding or editing a server configuration, the next screen will appear:

The next steps are only necessary if InvisiConnect is going to be used as an SMS Relay Server.

5-3

Figure 5-2 Server Configuration Screen

5.2.3 User Application Interface Select Echo/Relay Server. 5.2.4 IP Port Number Though there is only one Internet address assigned to InvisiConnect you can have multiple ports assigned and a unique server running for each port. Your computer system’s administrator usually assigns the port numbers. 5.2.5 Server Description Each server will be given a generic name such as “Echo/Relay Server”. You can assign a different label to each server that more clearly defines the application. For instance we’ve assigned the label “SMS Relay Modem” in Figure 5-2. 5.2.6 Auto Start Server At Startup If you check this box then the server will start automatically when you launch InvisiConnect. Otherwise use the “Start / Stop” button to manually start a server.

5-4

5.3 SMS/USSD Configuration SMS messages are not sent via the Internet like regular email but over a radio channel designated to carry Unstructured Supplementary Services Data (USSD). In many cases the SMS address of a mobile device, such as a cellular phone, consists partly of the phone’s telephone number. For instance, if the phone number is (909) 555-1212, then the address might look like 9095551212@myserviceprovider.net. The SMS/USSD Configuration window defines how an SMS message will be sent. Select “SMS/USSD Configuration” from the “Options” pull-down menu or select the icon near the top of the screen.

Figure 5-3 SMS/USSD Settings Screen

5-5

5.3.1 Enable SMS / USSD Check the Enable SMS/USSD box. 5.3.2 Use Attached Cellular Modem Select this option. 5.3.2.1 Cellular Modem Com Port The SMS Relay Modem connects to your computer using a serial cable connected to one of its hardware serial ports such as COM2. Select the appropriate serial port. 5.3.2.2 Flow Control Select None. 5.3.2.3 Baud Rate Select 9600 baud. 5.3.2.4 Data Bits Select 8. 5.3.2.5 Stop Bits Select 1. 5.3.2.6 Parity Select None. 5.3.2.7 Keep COM Port Open By checking this box no other programs running on the same computer will be able to use the SMS Modem’s COM port while InvisiConnect is running. 5.3.2.8 Use Send-Only Option When sending SMS there are several steps involved. First the message is sent to the cellular modem and is stored in its memory. Second, the modem is instructed to send the message. Finally, the modem must be instructed to delete the message from its memory. Some modems support a simpler and faster method known as send-only in which the message is transmitted without the need to store, retrieve or delete it. For the SMS Relay Modem, do not check this box. 5.3.2.9 Modem Reset and Initialization Strings Leave these fields blank. 5.3.3 SMS / USSD Prefix and Suffix As mentioned earlier the SMS address of a remote CNI is usually a combination of the unit’s phone number preceded and/or followed by a string of characters specific to the cellular provider. A prefix is any character string that precedes the mobile device’s phone number in the SMS address, and the suffix is anything that follows. For instance if the SMS address is sms@9095551212@myserviceprovider.net then the prefix is “sms@” and the suffix is “@myserviceprovider.net”. Your service provider will provide

5-6

this information. 5.3.4 Override Call-Back IP Address When the remote CNI calls InvisiConnect it normally uses the IP addresses and port numbers that have been programmed into its memory. The override feature allows the next call and the next call only to go to a different IP address and port number. This is only used when the application program issues the “ATD” (dial) command to InvisiConnect. InvisiConnect will then page the CNI with an SMS message and the CNI will call back to the alternate IP address and port number. This feature does not change the numbers that have been programmed into the CNI’s memory. Since every COM port is associated with a port number, it is that port number that will be used along with the override address. The port number is defined in the Server Configuration Screen. If this feature is not needed you must fill in the callback address with 0.0.0.0. Here’s an example of when this might be used. Suppose there are two different computer systems running InvisiConnect. The field devices normally call in to one of these systems, but there may be times when the other system wishes to communicate with the field devices. The override address will allow the devices to call the other system once, and then return to calling the original system. Either system can send the SMS message with the override address.

5.4 Saving and Loading Configurations The first time InvisiConnect is used it creates a configuration file called “Invisiconnect.cfg”. All configuration parameters are automatically saved here and reloaded the next time InvisiConnect is started. There may be a need to create different configurations for different applications. In this case you can use the FILE pull down menu in the upper left-hand corner of the screen to SAVE the present configuration into another file. You can choose to OPEN a previously saved configuration at any time. Each time InvisiConnect is started it will use the file that was in use during the previous session. 5.5 Normal InvisiConnect Operation and Indicators When all servers are stopped the large “InvisiConnect” banner near the top of the screen will be red. Yellow means there are some servers running and green means all servers are running. Each server has a trace screen that can be moved and resized as you wish. Each COM port status box has a red and green indicator. As data is transmitted and received these indicators provide a visual indication of port activity. These indicators can be resized and moved about the screen for better visibility. To do this point to the desired COM port and press the RIGHT button on your pointing device (ie – mouse). A small selection list will appear. Select either Display all Ports in a Separate Window or

5-7

Add Selected Ports to Separate Display Window. You can then manipulate the display as needed.

5-8

6-1

6 MODES OF OPERATION 6.1 Startup Behavior Figure 6-1 depicts the status LEDs on the CNI board.

Figure 8-1 CNI’s LED Indicators

When power is first applied to the CNI or when the unit is reset the green “program monitor” LED will light steadily for several seconds then should start flashing slowly.

• First, the CNI applies power to the cellular radio and will initialize the radio for data communications. During this time the “program monitor” LED will flash very slowly. When the radio is ready, the “program monitor” LED will flash more rapidly.

• The cellular radio will attempt to “register” with the cellular network. If the radio is

able to register with the network, the signal strength is checked. If the signal strength is very good the “program monitor” LED will flash very rapidly. If the signal strength is weak but usable the LED will flash at a somewhat slower rate. Good signal strength is equivalent to 3 or more “bars” on a typical cellular phone.

• The “call in progress” LED will light solid red. At this point the CNI can be used to

send SMS messages.

• Each time InvisiConnect communicates with the CNI the “Transmit Data” and “Receive Data” LEDs will flash as data is exchanged.

6.2 Over-the-Air Activation (CDMA18 only) CDMA technology does not support the use of a SIM card (Subscriber Identity Module) to hold and transport account information. Therefore the account information must be downloaded into the cellular module’s own memory. This is usually accomplished by dialing a special phone number to request “over-the-air-activation” (OTAA). The

6-2

activation phone number is specific to the service provider and must be programmed into the CNI using the MP32 configuration software (Chapter-4). The OTAA process does two things. First, if this is the very first OTAA call, a new phone number is programmed into the phone. This starts the account billing process. Second, a “preferred roaming list” (PRL) is downloaded into the phone. This instructs the radio which service provider(s) to search for and connect to. If the CNI sees that the radio’s phone number contains all zeros then the activation number is dialed and over-the-air activation is attempted. This also happens automatically whenever the unit is reset and then every 7 days thereafter. The reason for this is that cellular service providers often make arrangements with other providers to carry calls in areas where their own equipment and towers do not exist. These agreements allow the call to be forwarded at no additional charge. The preferred roaming list says that it is acceptable to connect with these carriers. However at some point your service provider may install new equipment in these areas, and the contract with the partner may be terminated. In this new situation roaming fees will be added to each call if the radio is allowed to connect to the other carriers. This is why it is important to periodically update the PRL. Here is how the CNI behaves during an OTAA call:

• First, the CNI applies power to the cellular radio and will initialize the radio for data communications. During this time the green “program monitor” LED will flash very slowly. When the radio is ready, the “program monitor” LED will flash more rapidly.

• The cellular radio will attempt to “register” with the cellular network. If the radio is

able to register with the network, the signal strength is checked. If the signal strength is very good the green “program monitor” LED will flash very rapidly. If the signal strength is weak but usable the LED will flash at a somewhat slower rate. Good signal strength is equivalent to 3 or more “bars” on a typical cellular phone.

• The “call in progress” LED will light solid red. The OTAA phone number is dialed

(this was programmed into the CNI using MP32). If a connection is established with the cellular provider both the “call in progress” and the “carrier detect” LEDs will flash slowly.

• For the next 1 –2 minutes the cellular provider should download a new phone

number if needed and a new PRL. When the call has finished both the “call in progress” and the “carrier detect” LED will turn off, and the “transmit data” and “receive data” LEDs will light solidly for at least several seconds.

IMPORTANT NOTE

If the OTAA call occurs more three times in a row, this indicates that the download process is failing. Remember, a cellular account must be purchased prior to activating the CNI. You usually have to provide the cellular provider with the “ESN” number that is printed on the label of the radio. Make sure this number is correct.

6-3

Also check the OTAA phone number that was programmed using MP32 (see Chapter-4). Some service providers may have different OTAA phone numbers to use depending upon geographical location. If you continue to have problems you may have to contact your service provider directly.

6-4

7-1

7 SAFETY, HAZARDOUS AREAS, ESD PRECAUTIONS Safety

WARNING This product contains a radio-frequency transmitter,

Motorola Model g18, FCC ID # IHDT6AC1, Motorola Model g20, FCC ID # IHDT56DB1 or Motorola Model c18, FCC ID # IHDT56CW1.

The combined cable loss and antenna gain must not exceed 6.1dBi

gain, and the antenna installation must provide a minimum separation distance of 20cm (8”) from users and nearby persons and must not be collocated or operating in conjunction with any other antenna or

transmitter.

See Chapter-7 for more safety information. Hazardous Area Classification At the time of this publication no hazardous area safety approvals have been received for the CNI product. It is therefore necessary to ensure that the product is only installed at locations that are classified as ‘safe area’ sites. Safety barriers must be utilized if it becomes necessary to route any cables into a hazardous area boundary. Refer to the U.S. National Electrical Code (NEC) book, article 510, as well as any relevant local ordnance for guidance with hazardous area wiring. It is the responsibility of the user to ensure compliance with regulations regarding hazardous area locations. This may require the site to be inspected by a certified electrician to maintain full compliance.

7-2

ESD Handling Precautions Any electronics device contains components sensitive to ESD (electrostatic discharge). For example people experience up to 35kV ESD, typically while walking on a carpet in low humidity environments. In the same manner many electronic components can be damaged by less than 1000 volts of ESD. For this reason you must observe the following handling precautions when servicing this equipment:

• Always wear a conductive wrist strap. • Eliminate static generators (plastics, styrofoam, and so on) in the work area. • Remove nylon or polyester jackets, roll up long sleeves, and remove or tie back

loose hanging neckties, jewelry, and long hair. • Store and transport all static sensitive components in ESD protective containers. • Disconnect all power from the unit before ESD sensitive components are

removed or inserted, unless noted. • Use a static safeguarded workstation, which can be set up by using an anti-static

kit (Motorola part number 0180386A82). This kit includes a writes strap, two ground cords, a static control tablemat, and a static control floor mat. The Motorola part number for a replacement wrist strap that connects to the tablemat is 4280385A59.

• When anti-static facilities are unavailable, use the following technique to minimize the chance of damaging the equipment:

o Let the static sensitive component rest on a conductive surface when you are not holding it.

o When setting down or picking up the static sensitive component, make skin contact with a conductive work surface first and maintain this contact while handling the component.

o If possible, maintain relative humidity of 70-75% in development labs and service shops.

8-1

8 TECHNICAL SPECIFICATIONS Model: GSM18, GSM20 or CDMA18 Cellular Network Interface

with “SMS Relay Modem” firmware option Input Voltage Range (TB2): 9 to 28 Vdc Input Current Requirements: 750 milliamps minimum. For the GSM18 or GSM20 peak

currents can be as high as 1.8 amps for a duration of 0.5 milliseconds every 4.5 milliseconds. Average current draw for the CDMA18 is about 800 milliamps.

Main crystal frequency: 9.8304 MHz. Serial Port: Output levels on TX, DCD and DSR: ±9V max. Input levels on RX and DTR: ±15V max.

Baud rate: 300 to 38400 (user-selectable, but normally 9600 baud for the SMS Relay Modem application)

Antenna (internal rigid): 1850 – 1990 MHz, Metretek Stock #1008-0012B-001 Antenna (external kit): 1850 – 1990 MHz, Metretek Stock #1014-0044-003 1710 – 1880 MHz, Metretek Stock # 1014-0044-002 890 – 960 MHz, Metretek Stock # 1014-0044-001 824 – 894 MHz, Metretek Stock # 1014-0044-004 Cellular Radio (GSM18): Motorola Model g18 Tri-Band GSM GPRS

FCC ID# IHDT6AC1 Metretek Stock Number 1015-0184-001 Cellular Radio (GSM20): Motorola Model g20 Dual-Band GSM GPRS

FCC ID# IHDT56DB1 Metretek Stock Number 1015-0199-001 (850 / 1900 MHz) Metretek Stock Number 1015-0201-001 (900 / 1800 MHz) Cellular Radio (CDMA18): Motorola Model c18 Dual-Band CDMA 1XRTT

FCC ID# IHDT56CW1 Metretek Stock Number 1015-0198-001 Antenna Connector: MMCX Jack (female), 50 ohm impedance.

8-2

Receive Frequencies: GSM20, CDMA18 824-849 MHz

GSM20, GSM18 880-915 MHz GSM20, GSM18 1805-1880 MHz

GSM20, GSM18, CDMA18 1930-1990 MHz Transmit Frequencies: GSM20, CDMA18 869-894 MHz

GSM20, GSM18 880-915 MHz GSM20, GSM18 1710-1785 MHz GSM20, GSM18, CDMA18 1850-1910 MHz

Weight (board only): 3.8 oz (108 grams) Operating temperature range: -22° to +140° Fahrenheit (-30° to +60° Celsius)

9-1

9 WARRANTY INFORMATION The seller warrants its hardware to be free from defects in material and workmanship under normal and proper use for a period of 12 months from the date the hardware is shipped from Metretek, Incorporated. The seller’s sole liability and the buyer’s sole remedy for any breach of the foregoing provision is, at the seller’s option, the timely no-charge repair or replacement of any defective hardware or part that Metretek inspects and finds reasonable evidence that a defect in material or workmanship exists. The buyer shall provide the labor required to remove the defective hardware and install its replacement at no charge to the seller. The equipment will be shipped to the seller at the buyer’s expense. The replacement or repaired equipment will be shipped to the buyer at the seller’s expense. Warranty claims to be honored under this warranty must be made promptly. Such claims shall specify the nature and details of the claim, the date that the cause of the claim was first observed, and the affected equipment’s unit serial number. Defective equipment shall not be returned to the seller’s factory without prior authorization from the seller. A copy of the claim’s documentation must be attached to the defective equipment and sent to the seller’s manufacturing facility. Defective components replaced under this warranty shall become the property of the seller. The seller makes no representation or warranty other than those set forth in this agreement. THE WARRANTY STATED HEREIN IS EXPRESSLY IN LIEU OF ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY EXPRESSED OR IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. SUCH WARRANTY CONSTITUTES THE ONLY WARRANTY MADE BY THE SELLER WITH RESPECT TO THIS AGREEMENT, THE EQUIPMENT UNITS, OR THE SERVICES TO BE SUPPLIED HEREBY. THE SELLER SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND. This warranty will not extend to equipment subjected to accident, to misuse, or to alterations/repair not made and documented in writing by Metretek.

Returns Procedure If it has been determined through troubleshooting that the problem cannot be resolved without returning the equipment for repair, then a return authorization (RA) number will need to be obtained. Please call 1-800-327-8559 or 1-321-259-9700 to contact the repairs department for obtaining the RA number as well as the return form document that should be filled out. When filling out the repair return form, it is beneficial to provide a description of the problem with as much detail as is necessary to fully characterize the symptom(s). This will assist our technicians in being able to narrow in on the problem, and reduces the possibility that a unit will be returned to the customer with “no problem found”. Intermittent type problems can be especially difficult to troubleshoot without a detailed description of the symptoms.

9-2