Nortel Networks 553-3001-211 manual Procedure Connecting to the MDF, 12B

NT5D11 and NT5D14 Lineside T1 Interface cards Page 203 of 894

Procedure 11

Connecting to the MDF

To make the connections at the MDF, follow this procedure:

1Punch down the first eight pairs of a standard telco 25-pair female-connectorized cross-connect tail starting with the first tip and ring pair of the lineside T1 motherboard card slot on the cross-connect side of the MDF terminals.

2Plug the NT5D13AA lineside T1 I/O cable into this 25-pair cross-connect tail at the MDF, regardless of the card slot restrictions that exist from the vintage level of IPE or CE module used. This connection can also be made at the MDF without using the NT5D13 lineside T1 I/O cable, by cross-connecting according to the pinouts in Table 80.

3Turn over the T1 transmit and receive pairs, where required for hardwiring the lineside T1 card to local CPE T1 terminal equipment.

End of Procedure

The backplane connector is arranged as an 80-row by 2-column array of pins. Table 80 shows the I/O pin designations for the backplane connector and the 25-pair Amphenol connector from the I/O panel. Although the connections from the I/O panel only use 14 of the available 50 pins, the remaining pins are reserved and cannot be used for other signaling transmissions.

The information in Table 80 is provided as a reference and diagnostic aid at the backplane, since the cabling arrangement can vary at the I/O panel. See Communication Server 1000M and Meridian 1: Large System Installation and Configuration (553-3021-210) for cable pinout information for the I/O panel.

Table 80

Lineside T1 card – backplane pinouts (Part 1 of 2)

Backplane	I/O Panel
Connector Pin	Connector Pin	Signal
12A	1	T1 Tip, Receive Data
12B	26	T1 Ring, Receive Data

Circuit Card Description and Installation