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NT5D97AA/AB DIP switch settings 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 Table 38 "Impedance level and loop mode switch
settings" (page 131).
Table 38
Impedance level and loop mode switch settings
Switch
Description
S9/S15 Switch Setting
1
Impedance level
OFF - 120 ohm
ON - 75 ohm
2
Spare X
3
Spare X
4
Unit mode
OFF - Loop operates in the DTI2 mode
ON - Loop operates in the PRI2 mode
Transmission mode
A per-trunk switch (S4/S10) provides a selection of the digital trunk interface
type. Refer to Table 39 "Impedance level and loop mode switch settings"
(page 131).
Table 39
Impedance level and loop mode switch settings
Description
S4/S10 switch settings
E1
OFF
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 Table 40 "Trunk interface line
build out switch settings" (page 131).
Note: Do not change this setup.
Table 40
Trunk interface line build out switch settings
Description
Switch setting
S5/S11 S6/S12 S7/S13
0dB
OFF OFF OFF
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
.