Owner's manual

84 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 84)).
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 84)).
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 84)).
Table 19
DCH mode and address select switch settings
Swit
ch
Description
S3 Switch Setting
1-4
D-Channel daughterboard
Address
See the next table.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.