Nortel Networks 553-3901-200 instruction manual Cross-connect the MDF

Page 28 of 46 Install ISDN BRI hardware

Table 3

UILC port designation labels at the MDF: NT8D37 IPE Module (16-cable configuration) (Part 2 of 2)

9	TR	TR	TR	TR	TR	TR	TR	TR	L
	0	1	2	3	4	5	6	7
10	TR	TR	TR	TR	TR	TR	TR	TR	M
	0	1	2	3	4	5	6	7
11	TR	TR	TR	TR	TR	TR	TR	TR	N
	0	1	2	3	4	5	6	7
12	TR	TR	TR	TR	TR	TR	TR	TR	R
	0	1	2	3	4	5	6	7
13	TR	TR	TR	TR	TR	TR	TR	TR	S
	0	1	2	3	4	5	6	7
14	TR	TR	TR	TR	TR	TR	TR	TR	T
	0	1	2	3	4	5	6	7
15	TR	TR	TR	TR	TR	TR	TR	TR	U
	0	1	2	3	4	5	6	7
Note: The cable pair designated TR is a 2B1Q full duplex U interface.

Cross-connect the MDF

The MDF cross-connects NE-A25B cables connected to SILC and UILC ports with building wiring connected to ISDN BRI terminals.

Each SILC provides eight four-wire full duplex ports. These ports are connected to building wiring to form DSLs. These ports are polarity sensitive. Signal polarity must be maintained along each loop.

Each UILC provides eight two-wire full duplex ports. These ports are connected to twisted pair building wiring to form DSLs. These DSLs are not polarity sensitive and, although it is recommended, it is not necessary to maintain signal polarity along each loop.

Figure 7 and Figure 8 illustrate, respectively, a cross-connection of an SILC port and an UILC port to the building wiring.

553-3901-200 Standard 7.00 January 2002