Nortel DCT1900 Technical Product Manual page 296

Technical Product Manual - DCT1900
Installation Instructions, Modular Cabinet – LTU Cabling
Connector Cable Pair-In
5
5
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6
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6
Analog channel 1 tip/ring will appear at the top of the 66 Block. Analog channel 24 tip/ring will
appear on the second to the last pair of the punch down clips at the bottom of the Block. Pair 25 is
not used and is not connected.
Note:
To meet the EMC requirements, the cable should never be cut to a length shorter than 8.2 ft.
Signalling Ground for LTU when using Earth Signalling for Recall
The signalling ground is only applicable when earth signalling is used instead of timed break
signalling. The MCCB connect the signalling ground from the PBX to maximum of 7 LTUs.
1. Connect the PBX signalling ground from the MDF to the PBX screw connector on the MCCB.
2. If more Modular Cabinets are used in a system, chain the PBX connectors.
3. Connect an LTU/MCCB ground cable (TSRNB 101 035) to the LTU1 connector on the MCCB.
4. Connect the other end of the LTU/MCCB ground cable to the LTU ground connector on the
furthest left LTU (see Fig. 23-2).
23-4
Wire Color
7-5 Red
7-6 Orange
8-1 Red
8-2 Green
9-5 Red
9-6 Brown
10-1 Red
10-2 Gray
11-5 Black
11-6 Blue
12-1 Black
12-2 Orange
Table 23-1 LTU to 66 Block Cabling (cont.)
25 Pair Signal Name
Connector Pin
44 Analog Channel - 19T
19 Analog Channel -19R
45 Analog Channel - 20T
20 Analog Channel - 20R
46 Analog Channel - 21T
21 Analog Channel - 21R
47 Analog Channel - 22T
22 Analog Channel - 22R
48 Analog Channel - 23T
23 Analog Channel - 23R
49 Analog Channel -24T
24 Analog Channel -24R
Install-DCT1900/R8/mw
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