Nortel Networks NN43001-301 - Manual (Page 146)

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
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
.