Nortel Networks 311 User Manual
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
receiver impedance. Use SW8 for Trunk 0; use SW14 for Trunk 1 (see
Table 17
Trunk interface impedance switch settings
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
(see
Table 18
Ring ground switch settings
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
and an external MSDL/DCHI card. Four other switches provide the
daughterboard address (see
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.