Functional description 349
Table156
Trunk1 switches
Switch Function
S7 General Purpose...See Table 152 "General purpose
switches for NT5D97AD" (page 348)
S10 TX Mode...See Table 153 "TX mode switches for
NT5D97AD" (page 348)
S13, S14 & S15 LBO...See Table 154 "LBO switches for NT5D97AD"
(page 348)
S11 RX Impedance...See Table 155 "Receiver interface
switches for NT5D97AD" (page 348)

Ring ground switches for NT5D97AD Switch S16 selects which ring

lines connect to ground. When set to ON, the ring line is grounded.

Table157
Ring ground switch for NT5D97AD
Switch Line
S16_1 Trunk 0 Transmit
S16_2 Trunk 0 Receive
S16_3 Trunk 1 Transmit
S16_4 Trunk 1 Receive
DCH Address select switch forNTBK51AA daughterboard for NT5D97AD

Switch S9 selects the NTBK51AA DCH daughter card address.

Switch S8 is not used when the NTBK51AA daughter card is used. S8_1-10

can be set to OFF position.

Table158
NTBK51AA DCH switches for NT5D97AD
Switch number Function
S9_1-4 DCH daughter card address
S9_5-8 Set to OFF
S9_9 Set to ON (NTBK51AA Mode)
S9_10 Set to ON (NTBK51AA Mode)
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23May 2008
Copyright© 2003-2008, Nor tel Networks
.