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Cabler Registration Course

JB Hunter Technology© Part 1 – Page 67 v6.1

Chapter 6 – Wiring Plans The 600 series socket has fallen out of favour because:-

Screw terminals may become loose. Wires can easily be damaged by over tightening screws. Poor connection from incorrectly installing wires. Suffer easily from corrosion.

The newer modular sockets are based on the proven insulation displacement connection (IDC) method of termination. This termination method is used in both the RJ45 and ADC KRONE®

Media sockets as it produces a gas tight connection, thereby reducing corrosion and contact resistance.

The IDC style of termination permits the correct termination of two wires of the same diameter in the same contact slot without wire damage. 6.1 Uses of Plugs & Sockets Socket Use Mating Plug

610 Network boundary and additional phone/fax/internet outlets.

605 plug

8 Pin Modular Additional phone/fax/internet outlets as well as data outlets for computer and printer in a networking environment.

8 pin modular plug

8 Pin Modular (8P4C)

Telstra’s network boundary socket and for additional phone/fax/internet outlets.

8 pin modular plug

611 Mode 3 (switching) socket for alarm connection to a telephone service).

605 plug

8 Pin Modular (8P4S- Switching)

Mode 3 (switching socket for alarm connection to a telephone service).

8 pin modular plug

610 with RJ12 adaptor socket fitted

An equipment plug often (but incorrectly) mated with the 8 pin modular sockets.

“RJ12” plug (6 pin)

Table 1 – Socket Types and their Application



6.2 TELSTRA 8P Modular Sockets and Associated Hardware

(With acknowledgement to TELSTRA – Specification 012882 A2A Issue 2)





6.3 600 Series Socket Wiring Plans The carrier supplies the lead-in and terminates this cable at the network boundary, from that point any further extension of the service must be carried out by a registered cabler. The following wiring diagrams can apply to either the network boundary being an NTD or the first socket. In the case of the NTD customer cabling is installed by the registered cabler, whereas in the case of the lead-in terminating on the first socket the carrier supplies the cable and the first socket, the cable and additional socket for accessing the second line is also the carrier’s responsibility. The cabler is not allowed to move a network boundary without the Carriers written authorisation. Note: Refer to Telstra Specification 012882 – Alteration to Telstra Facilities in

Homes and Small Businesses. (Issue 2, June 2008); and Telstra Specification 012688 – Telstra Network Termination Device (Issue 4,

September 2008).

Lead-in Cable

Wire Colour Polarity Service No.

Pin No on 610 Socket

Pair 1 WHITE BLUE

+ve -ve

1 2 6

Pair 2 RED BLACK

+ve -ve

2 1 5

Table 2

Carrier’s First Socket 600 Series Socket Terminations



6.3.1 Additional Socket The additional socket can be used for a parallel phone, an answering machine, fax or internet connection.

Figure 1 Wiring of Parallel Phone Socket off Network Boundary 610 Socket



6.3.2 Mode 3 Installation using 611 Socket The 611, mode 3, socket can be installed by the carrier as a network boundary socket, however this is not usual. The 611 socket is normally installed to an existing service to provide service to a security alarm service. In this case the network boundary socket will need to be blocked off

; otherwise the operation of the security alarm may be compromised.

Figure 2 Mode 3 Installation Using 611 and New 610 Socket



6.3.3 Accessing for a Second Telephone Service As previously mentioned terminating the wires of the second pair on terminals 1 & 5 of the “first” socket is not advisable, so instead they should crimped onto the cable pairs serving the socket of the second service.

Figure 3 Wiring of a Third 610 Socket to Access a Second Telephone Service



6.4 Wiring Plans Using Modular Sockets 6.4.1 The “RJ45” Socket The 8 pin modular socket (RJ45) it is typically used to terminate one 4 pair cable. It is the most common type of socket used in the commercial structured cabling environment, however it has also has application in the small office home office environment or SOHO under AS/NZS 3086: 2002. When used for voice telephony pins 4 & 5 are used, for ISDN “OnRamp” pins 4 & 5 and 3 & 6 are used for this 4 wire voice/data service. Be aware of the potential for high TNV hazards to exist in the On-ramp ISDN cabling.

Figure 4 – FMK RJ45 Jack 6.4.2 The 8 Pin /4 Contact Modular Sockets These sockets are used primarily in the house / small shop environment, with three basic types, the 8P4C, 8P4S & 8P4G.

Figure 5

8P4C Modular Socket 8P4S Modular Socket 8P4G Modular Socket (Standard) – Grey (Switching) – Blue (Gel-Filled) - Black



Figure 6

Termination of Cable(s) on 8P4C/8P4S/8P4G Socket The design enables two carrier lines to be terminated on the one socket, as they use modular plugs. The 1st service on pins 4 & 5 and the 2nd

on pins 3 & 6, and each pin having a duplicate termination slot, allowing additional sockets to be cabled without disturbing the incoming connection.

Figure 7 – Pair allocations on the ADC KRONE®

Media Socket



6.4.2.1 Cable Colour Code Adjustment for ADC KRONE®

Media Sockets when Used for Multi-Line Connections

Cable colour Code for 2 – pair, 3 – pair or 4 – pair cable is shown below in Table 2.

Table C1 from AS/ACIF S009 (page 111)



6.4.3 Additional Socket Wiring Diagram The following diagram shows the wiring from an NTD that is done by the cabler and that is to be done by the carrier from a connection box.

Figure 8 Standard Bus-Wired TOs for 1 Line



6.4.4 Mode 3 Connection

Figure 9

Pictorial of Mode 3 Connection with ADC Krone 8P4S/C Sockets

Figure 10 Mode 3 Connection Using ADC Krone Media Sockets

Note: Only the pairs required to connect the Mode 3 service are shown in this schematic diagram.



Figure 11 below shows the connection of the service prior to the installation of the security alarm system. Contact 3 & 4 and 5 & 6, in the 8P4S connects the exchange line to the additional socket for the telephone.

Figure 11 – Operation of ‘Switching’ Socket with Alarm Equipment Unplugged



The following diagram shows the operation of the mode 3 socket, at normal, contacts within the alarm extend the “a” & “b” wires to the phone socket. If the alarm is activated the contacts within the alarm disconnects the line from the phone and extends it directly to alarm circuitry.

Figure 12 Mode 3 Connection Using ADC Krone Media Sockets

If the alarm plug is removed the contacts 3 & 4 and 5 & 6 make and extend the service from the Mode 3 socket to the additional TO socket as per Figure 11.



6.5 Testing On completion of an installation, no matter how much care to detail has gone into the work a final test out is essential. 6.5.1 Visual Inspection

Correct wire colour in respective IDC slot. Sound termination. Correct termination for particular type of service.

6.5.2 Electrical Test Out

Test for dial tone with test buttinski. Check correct polarity with multimeter. “a” leg positive and “b” leg negative. If mode 3 connection, ensure without a security alarm installed dial tone is

available at all sockets. If mode 3 socket connection and security alarm installed ensure that when the

alarm is activated the internal security alarm circuitry disconnects all telephone sockets.

6.6 DSL Installations (Digital subscriber line) DSL uses the customer’s line to supply two (2) services: (1) A voice telephone service or, a lower frequency or VF Voice frequency line; (2) A High Rate Digital (Broadband)service for internet connection. These two frequencies then need to be separated by the use of filters. The ADSL Modem has its own High pass filter built in, but low pass or VF filters need to be fitted to all voice equipment (telephone, fax, alarm etc). 6.6.1 How ADSL works Asymmetric DSL Most homes and business users are connected to an Asymmetric Digital Subscriber Line (ADSL). ADSL divides the available frequencies in a line on the assumption that most users look at or download more information than they send or upload. Under this assumption, if the connection speeds from the internet to the user is three to four times faster than the speed from the user to the internet, the user will see the most benefit. (Most of the time).



6.6.2 Other types of DSL Symmetric DSL SDSL is similar to ADSL but offers the same bandwidth in both directions. This is suited to users that use the internet to send and receive similar amounts of information. VDSL (Very High Speed Digital Subscriber Line) VDSL can operate in symmetric or asymmetric mode, providing speeds of between 6Mbps and 25Mbps. This is typically provided from a street cabinet that is directly connected to the exchange by fibre. 6.6.3 ADSL Installations There are two types of low pass filters or “splitters”.

Distributed (or in line) Splitters are connected in series with each VF device, usually in the line cord and external to the socket, so they can be installed by the customer.

Central filter (or Remote Splitter) is installed in the wiring used to connect the VF equipment. This filter may be installed by the carrier or the cabling provider as appropriate.

However in all cases where there is a “mode 3”connection required it must not cut off the Digital Broadband service when seizing the line to dial out. 6.6.4 Distributed splitter



6.6.5 ADSL Installations – Central Filter Earlier installations may not have had a Connection Box but have a direct lead-

in to the first T.O. As the ADSL modem has a high pass filter to block V.F telephony. Signals it

can be directly connected to the first T.O. The Central Filter can be fitted to the line to filter all other T.O.’s The cabling provider is authorised to alter if necessary under the Authority to

Alter (or A2A) spec 012 882 the existing Telstra Lead-in cabling to make the ADSL socket the first T.O.

This arrangement is generally not suited to the installation of a monitored alarm system as the “mode 3” socket has to be the first T.O. and if it was, it would interrupt the internet connection when the dialler seizes the line.



6.6.6 ADSL Installations – Remote Splitter Installed by Telstra in the Lead-in Cable

In this case Telstra usually installs the Remote Splitter or Central filter on the external wall.

The splitter forms part of the Telstra network and results in two distinct Network Boundaries. One for the ADSL Broadband and one for voice (Telephony).

Cabling Providers are authorised under the A2A to alter the cabling to either or both of the first T.O’s.

The Cabling Provider is Not Authorised to install a new Remote Splitter in the Lead-in Cabling before the first socket.

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