
146 NT5D12 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
0dB
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
.
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