Nortel Networks NN43001-301 - Manual (Page 131)

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
.