Owner's manual

Functional description 339
Table 133
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
ground. Refer to Table 134 "Ring ground switch settings" (page 339).
Table 134
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 daughterboard for
NT5D97AA/AB
In case of an on-board NTBK51AA D-channel daughterboard, set of four
switches (S3) provide the daughterboard address. Refer to Table 142
"Trunk 1 switches" (page 343).
Note: Switch 8 of S3 (S3-8) does not require a switch setting to
select between the on-board NTBK51AA D-channel daughterboard
and an external DCHI/MSDL. The NT5D97 detects when the on-board
NTBK51AA D-channel daughterboard is used.
Table 135
DCH mode and address switch settings
Swit
ch
Description
S3 switch setting
1-4
D-channel daughterboard address See Table 136
"NTBK51AA
daughterboard
address select switch
settings" (page 340)
5-8
For future use OFF
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.