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NT5D12 switch settings 147
Table 59
Ring ground switch settings
Switch
Description
S2 Switch Setting
1
Trunk 0 Transmit
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 mode and address select switches
A set of eight DIP switches selects between an onboard NTBK51AA
D-channel daughterboard and an external MSDL/DCHI card. In the case
of an onboard NTBK51AA D-channel daughterboard, four of the switches
provide the daughterboard address. See Table 60 "DCH mode and address
select switch settings" (page 147).
Table 60
DCH mode and address select switch settings
Switch
Description
S3 Switch Setting
1-4
D-channel daughterb
oard
Address
See Table 61 "NTBK51AA daughterboard
address select switch settings" (page 148)
5-7
For future use. OFF
8
External DCH or
Onboard DDCH
OFF - MSDL or DCHI card
ON - Onboard DDCH daughterboard
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
.