Nortel Networks NN43001-301 - Manual (Page 132)

132 NT5D97 Dual-port DTI2/PRI2 installation and removal
Receiver impedance
A per-trunk set of four DIP switches (S8/S14 provides selection between
75 or 120 ohm values. Refer to
Table 41 "Trunk interface impedance switch
settings" (page 132) .
Table 41
Trunk interface impedance switch settings
Description S8/S14 switch setting
75 ohm OFF OFF ON OFF
120 ohm OFF OFF OFF ON
Ring ground switches for NT5D97AA/AB
A set of four DIP switches (S2) selects which Ring lines are connected to
the ground. Refer to
Table 48 "LBO switches for NT5D97AD" (page 136) .
Table 42
Ring ground switch settings
Switch Description S2 switch settings
1 Trunk 0 Transit OFF-Ring line is not grounded
ON- Ring line is grounded
2 Trunk 0 Receive OFF-Ring line is not grounded
ON- Ring line is grounded
3 Trunk 1 Transmit OFF-Ring line is not grounded
ON- Ring line is grounded
4 Trunk 1 Receive OFF-Ring line is not grounded
ON- Ring line is grounded
DCH Address select switch for NTBK51AA daughter board for
NT5D97AA/AB
In case of an onboard NTBK51AA D-channel daughterboard, a set of four
switches (S3) provide the daughterboard address. Refer to
Table 50 "Trunk
1 switches" (page 137) .
Note: Switch 8 of S3 (S3-8) does not require a switch setting to
select between the onboard NTBK51AA D-channel daughterboard
and an external DCHI/MSDL. The NT5D97 detects when the onboard
NTBK51AA D-channel daughterboard is used.
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
.