Nortel Networks 1000 User Manual

Page 617

Configuration

617

The trunk type, terminating impedance, and balance network are selected
by making service change entries in the Trunk Administration program LD
14. See

Table 231 "Trunk types - termination impedance and balance

network (NT8D14BA, NT8D14BB)" (page 615)

for the proper values for the

trunk type and loop length. Refer to Software Input/Output Reference —
Administration (NN43001-611) for LD 14 service change instructions.

Before the appropriate balance network can be selected, the loop length
between the near-end (CS 1000) and the far-end (a Central Office, for
example) must be known. To assist in determining loop length, some
typical resistance and loss values for the most common cable lengths
are given in

Table 232 "Cable loop resistance and loss" (page 616)

for

comparison with values obtained from actual measurements.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

02.06

Standard

27 August 2008