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IRITELTELECOMMUNICATIONS & ELECTRONICSIRITEL Multiplexing Equipment Commissioning
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FM-MSAN
IRITEL Multiplexing Equipment
Commissioning
November 2007
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FM-MSAN Commissioning – Contents FM-MSAN Analog Interface Units
Analog 4-wire Interface Units PEM10 – 10 2-wire/4-wire interfaces with E/M signalling
Analog 2-wire Interface Units PAC10 – 10 POTS interfaces (exchange side) PAT10 – 10 POTS interfaces (subscriber side) PLB10 – 10 field phone (with local battery) interfaces
FM-MSAN Digital Interface Units PCO – 10 G.703 64 kbit/s codirectional interfaces PN64 – 4 X.21/V.11 interfaces with n x 64 kbit/s capacity PN64A – 8 asynchronous transparent RS232 interfaces PIU-NT – 4 ISDN BRI U-interfaces (exchange side) PIU-LT – 4 ISDN BRI U-interfaces (subscriber side) PET – 3 Ethernet Bridge ports with n x 64 kbit/s capacity
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FM-MSAN Analog Interface Units – Connecting Test Equipment Each analog interface that is switched on and configured will be
carried in one 64 kbit/s timeslot of a 2 Mbit/s multiplex. To test an FM-MSAN analog interface, connect the testing equipment to the appropriate connecting points of the MDF (Main Distribution Frame) and DDF (Digital Distribution Frame): Connect the analog test equipment (or alternatively, terminal
equipment) to the MDF port of the analog interface to be tested Connect the E1 tester to the appropriate E1 link and enter the
timeslot that corresponds to the analog interface to be tested
When executing test as described above, you are testing, all at once: FM MSAN configuration Analog voice and signaling interfaces 2 Mbit/s multiplex and cross-connect Cabling between the interface unit and MDF/DDF MDF/DDF cabling
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Testing 4-wire PEM10 Interface Unit – PEM10 Test Block Diagram and Test Conditions
Testing conditions: Connect the E1 tester to the appropriate E1 link and enter the timeslot that
corresponds to the analog interface to be tested Make the voice channel and E/M signaling loopback connection on the MDF port
of the analog interface to be tested Configure PEM10 interface as 4-wire, in order to use separate input (Rx) and
output (Tx) portsNote: by testing PEM10 4-wire interface, you are also testing its 2-wire interface
FM-MSAN
4-wire analog
interface
2 Mbit/s(E1 link)
FMV or PE1 unit
PЕМ10 interface unit
Tx
Rx
E1 Tester(Sunrise Telecom SunLite E1)
DDF
MDF
Tx Rx
Loopback on both voice channel and E/M signaling interface
IRITEL testing equipment:• Sunrise Telecom SunLite E1
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Testing 4-wire PEM10 Interface Unit – PEM10 Test Procedure
Test: Check the voice channel interface
Set the desired transmit frequency and transmit signal level (IRITEL standard values: 1020 Hz, -10 dBm)
Measure the receive frequency and receive signal level: The transmitted signal is sent through the DDF, FM‑MSAN and MDF and via the loopback is sent back and received by E1 tester. The received frequency should be the same as the transmitted frequency. The received signal level will be approximately 0.1 dB to 0.4 dB lower then transmitted signal – this is due to loss on MDF. If higher values of signal loss are detected, the bad wiring should be suspected
Check the E/M signaling interface Change transmit signaling A and B bits and check if the receive
bits correspond to changes.Note: in some applications only A bit is used (B bit is not wired on MDF)
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Testing 4-wire PEM10 Interface Unit – PEM10 Test Form
Signaling Interface #
A bit B bit
Tx Frequency
[Hz]
Tx Level [dBm]
Rx Frequency
[Hz]
Rx Level [dBm]
Test Result (Pass/Fail)
1 1020 -10
2 1020 -10
3 1020 -10
4 1020 -10
5 1020 -10
6 1020 -10
7 1020 -10
8 1020 -10
9 1020 -10
10 1020 -10
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Testing 2-wire Analog Interface Units – PAC10, PAT10 and PLB10 Test Block Diagram and Test ConditionsTesting conditions: Connect the E1 tester to the appropriate E1 link and enter the timeslot that
corresponds to the analog interface to be tested Connect the telephone/exchange tester to the MDF port of the analog
interface to be tested
IRITEL testing equipment:• Sunrise Telecom SunLite E1• Elektronika ETT10 Telephone & Exchange Tester
FM-MSAN
2-wire analog
interface
2 Mbit/s(E1 link)
FMV or PE1 unit
PAC10, PAT10 or PLB10 interface unit
Telephone & Exchange Tester(Elektronika ETT10)
MDF
Tx
Rx
E1 Tester(Sunrise Telecom SunLite E1)
DDF
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Testing 2-wire Analog Interface Units – PAC10, PAT10 and PLB10 Test Procedure
Test: Check the voice channel interface
Check reception by sending the signal from E1 tester to telephone/exchange tester
Check transmission by sending the signal from telephone/exchange tester to E1 tester
Check the receiving and outgoing signaling Depending on the type of interface unit, check
ringing, on/off-hook condition and metering
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Testing 2-wire Analog Interface Units – PAC10, PAT10 and PLB10 Test Form
Signaling Interface #
Receiving Outgoing
Voice channel
Interface (Pass/Fail)
1
2
3
4
5
6
7
8
9
10
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sTesting 2-wire Analog Interface Units – PAC10, PAT10 and PLB10 Alternative Test Procedure
Alternatively, you can check PAC10 and PAT10 interface units using end-to-end connection and terminal equipment (telephone exchange and telephone).
Similarly, you can check PLB10 interface units using end-to-end connection and terminal equipment (field phones on both sides)
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sTesting 2-wire Analog Interface Units – PAC10, PAT10 and PLB10 Alternative Test Procedure Block Diagram
PАC10
PАТ10
PLB10
FM-MSAN
FM-MSAN
Telephone Exchange
Telephone Interface
PLB10
Transmission System
Test PAC10-PAT10 and PLB10-PLB10 end-to-end connection functionally:
• Check voice channel in both directions
• Check signaling in both directions:• ringing• on/off-hook, if applicable• metering, if applicable
Note1: PLB10 does not support on/off hook and metering signalingNote2: For metering detection use Telephone Call Meter
