Nortel Networks Circuit Card 311 - Manual (Page 86)

86 Option settings
A set of four DIP switches provides selection among three values for
receiver impedance. Use SW8 for Trunk 0; use SW14 for Trunk 1 (see
Table
17 "Trunk interface impedance switch settings" (page 86) ).
Table 17
Trunk interface impedance switch settings
Description SW8/SW14 Switch Settings
75 off off on off
100 on off off on
120 off off off on
Ring ground switches
A set of four DIP switches selects which Ring lines are connected to ground
(see
Table 18 "Ring ground switch settings" (page 86) ).
Table 18
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
One switch selects an on-board NTBK51AA D-Channel daughterboard
and an external MSDL/DCHI card. Four other switches provide the
daughterboard address (see
Table 19 "DCH mode and address select
switch settings" (page 87) ).
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.