Nortel 1000 Installation And Commissioning Manual page 131

Trunk interface switches for NT5D97AA/AB
Impedance level and unit mode
The S9/S15 switch selects the impedance level and loop operation mode on
DEI2 OR PRI2. Refer to
settings" (page
Table 38
Impedance level and loop mode switch settings
Switch
1
2
3
4
Transmission mode
A per-trunk switch (S4/S10) provides a selection of the digital trunk interface
type. Refer to
(page
Table 39
Impedance level and loop mode switch settings
Description
E1
Not used
Line build out
A per-trunk set of three switches (S5/S11, S6/S12 and S7/S13) provides
the dB value for the line build out. Refer to
build out switch settings" (page
Table 40
Trunk interface line build out switch settings
Description
0dB
Copyright © 2003-2007, Nortel Networks
.
131).
Description
Impedance level
Spare
Spare
Unit mode
Table 39 "Impedance level and loop mode switch settings"
131).
Note: Do not change this setup.
Switch setting
S5/S11
OFF
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
NT5D97AA/AB DIP switch settings 131
Table 38 "Impedance level and loop mode switch
S9/S15 Switch Setting
OFF - 120 ohm
ON - 75 ohm
X
X
OFF - Loop operates in the DTI2 mode
ON - Loop operates in the PRI2 mode
S4/S10 switch settings
OFF
Table 40 "Trunk interface line
131).
S6/S12
OFF
S7/S13
OFF