146NT5D12 Dual-port DTI/PRI card installation

Table 56

Trunk interface transmission mode switch settings

Description

S4/S10 Switch Setting

 

 

For future use.

OFF

 

 

T1

ON

 

 

Line Build Out

A per-trunk set of three switches provides a selection between 0, 7.5 or 15 dB values. See Table 57 "Trunk interface line build out switch settings" (page 146).

Table 57

Trunk interface line build out switch settings

Description

 

Switch Setting

 

 

 

 

 

 

S5/S11

S6/S12

S7/S13

 

 

 

 

0 dB

OFF

OFF

OFF

 

 

 

 

7.5 dB

ON

ON

OFF

 

 

 

 

15 dB

ON

OFF

ON

 

 

 

 

Receiver Impedance

A per trunk set of four DIP switches provides a selection between 75, 100 or 120 values. See Table 58 "Trunk interface receiver impedance switch settings" (page 146).

Table 58

Trunk interface receiver impedance switch settings

Description

 

S8/S14 Switch Setting

 

 

 

 

 

 

75

OFF

OFF

ON

OFF

 

 

 

 

 

100

ON

OFF

OFF

ON

 

 

 

 

 

120

OFF

OFF

OFF

ON

 

 

 

 

 

Ring ground switches

A set of four DIP switches selects which Ring lines are connected to the ground. See Table 59 "Ring ground switch settings" (page 147).

Nortel Communication Server 1000

ISDN Primary Rate Interface Installation and Commissioning

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

Copyright © 2003-2007, Nortel Networks

Page 146
Image 146
Nortel Networks NN43001-301 manual Ring ground switches, 15 dB, 100, 120