Nortel Networks DCT1900 manual Connector Cable Pair-In Wire Color Signal Name

Technical Product Manual - DCT1900

Installation Instructions, Modular Cabinet – LTU Cabling

Connector	Cable Pair-In	Wire Color	25 Pair	Signal Name
			Connector Pin
5	7-5	Red	44	Analog Channel - 19T
5	7-6	Orange	19	Analog Channel -19R
5	8-1	Red	45	Analog Channel - 20T
5	8-2	Green	20	Analog Channel - 20R
6	9-5	Red	46	Analog Channel - 21T
6	9-6	Brown	21	Analog Channel - 21R
6	10-1	Red	47	Analog Channel - 22T
6	10-2	Gray	22	Analog Channel - 22R
6	11-5	Black	48	Analog Channel - 23T
6	11-6	Blue	23	Analog Channel - 23R
6	12-1	Black	49	Analog Channel -24T
6	12-2	Orange	24	Analog Channel -24R

Table 23-1 LTU to 66 Block Cabling (cont.)

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	Install-DCT1900/R8/mw
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