Nortel NT1R20, Description

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Page 248 of 290 QPC452 Basic 500/2500 Analog Line Card
553-3001-105 Standard 5.00 June 1999
Connector pin assignments
The basic 500/2500 analog line card brings the eight analog phone lines to the
PE backplane through an 80-pin bus. In a PE shelf, the bus lines feed into
seven multi-pin connectors that link the line cards to the main distribution
frame (MDF), also called the cross-connect terminal. In the NT8D13 Module
the backplane connector is cabled to the input/output (I/O) panel that is linked
to the MDF through 25-pair cables.
Telephone lines from station equipment cross connect to the basic 500/2500
analog line card at the MDF using a wiring plan similar to that used for trunk
cards. A list of the connections to the analog line card are shown in Table 70,
and a typical connection example is shown in Figure 70. See Meridian 1
system installation procedures (553-3001-210) for complete I/O panel
information and wire assignments for each tip/ring pair.
Table 70
Basic 500/2500 analog line card—backplane pinouts
Pin Signal Pin Signal
36A Line 0, Tip 37A Line 0, Ring
29A Line 1, Tip 30A Line 1, Ring
2A Line 2, Tip 3A Line 2, Ring
9A Line 3, Tip 10A Line 3, Ring
36B Line 4, Tip 37B Line 4, Ring
29B Line 5, Tip 30B Line 5, Ring
2B Line 6, Tip 3B Line 6, Ring
9B Line 7, Tip 10B Line 7, Ring