Nortel Networks 1000 - Manual (Page 339)

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
.