Nortel Communication Server 1000 Manual page 151

Trunk interface switches
Following are the trunk interface switches.
Trunk 0 switches Switch S12 gives the MPU information about its
environment
Table 76
General purpose switches
Switch
S12_1
S12_2
S12_3
S12_4
Factory setup of the switches is OFF, OFF, OFF, OFF.
Switch S2 selects the Transmission mode.
Table 77
TX mode switches
Tx mode
E1
Not used
Factory setup of the switches is OFF (E1). Do not change the setup of the
switches.
NT5D97AD Dual-port DTI2/PRI2 installation and removal 151
Name
Impedance level
Spare
Spare
loop mode
Nortel Communication Server 1000
DASS2 Fundamentals
NN43001-571 04.01 4 June 2010
Copyright © 2007-2010 Nortel Networks. All Rights Reserved.
Description
OFF - 120 ohm
ON - 75 ohm
OFF: loop operates in the
DTI2 mode
ON: loop operates in the
PRI2 mode
S2
OFF
ON