Siemens TC12 Installation, Commissioning And Maintenance Handbook page 52

2.2.7.4 Transformer PCB to BT cable
Figure 14 shows the cable terminations for connection to the MDF.
Two identical cables are used (part number 667/1/22654/001). These connect to
PL1 and PL3 on the appropriate Transformer PCB. The cable connected to PL1
connects all the OTUs associated with modems 1 and 2. The cable connected to
PL3 connects all the OTUs associated with modems 3 and 4. Each of the two
cables is a 20 pair cable with up to 16 pairs actually used. Refer to drawing
667/GA/22654/001 for wire colours etc.
If only one modem (of the four available on a modem PCB) is being used then a
10 pair cable can be used, part number 667/1/22654/000. Refer to drawing
667/GA/22654/000 for wire colours associated with particular connector pins.
If the 10 pair cable is used then the following two connections are possible:
1) 10 Pair cable connected to PL1:
Modem 2 only used with pair
2) 10 Pair cable connected to PL3:
Modem 4 only used with pair
BT cable tool, part number 667/7/22648/000 is used when installing the cable.
666/HE/43100/000
TC12 Installation, Commissioning & Maintenance Handbook
TP9 of 10 pair cable to OTU 2A
TP8 of 10 pair cable to OTU 2B
TP7 of 10 pair cable to OTU 2C
TP6 of 10 pair cable to OTU 2D
TP5 of 10 pair cable to OTU 2E
TP4 of 10 pair cable to OTU 2F
TP3 of 10 pair cable to OTU 2G
TP2 of 10 pair cable to OTU 2H
TP9 of 10 pair cable to OTU 4A
TP8 of 10 pair cable to OTU 4B
TP7 of 10 pair cable to OTU 4C
TP6 of 10 pair cable to OTU 4D
TP5 of 10 pair cable to OTU 4E
TP4 of 10 pair cable to OTU 4F
TP3 of 10 pair cable to OTU 4G
TP2 of 10 pair cable to OTU 4H
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