Nortel 1000 Installation And Commissioning Manual page 147

Table 59
Ring ground switch settings
Switch
1
2
3
4
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
select switch settings" (page
Table 60
DCH mode and address select switch settings
Switch
1-4
5-7
8
Copyright © 2003-2007, Nortel Networks
.
Description
Trunk 0 Transmit
Trunk 0 Receive
Trunk 1 Transmit
Trunk 1 Receive
Description
D-channel daughterb
oard
Address
For future use.
External DCH or
Onboard DDCH
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
NT5D12 switch settings 147
S2 Switch Setting
OFF - Ring line is not grounded
ON - Ring line is grounded
OFF - Ring line is not grounded
ON - Ring line is grounded
OFF - Ring line is not grounded
ON - Ring line is grounded
OFF - Ring line is not grounded
ON - Ring line is grounded
Table 60 "DCH mode and address
147).
S3 Switch Setting
See Table 61 "NTBK51AA daughterboard
address select switch settings" (page 148)
OFF
OFF - MSDL or DCHI card
ON - Onboard DDCH daughterboard