Nortel Networks Circuit Card 311 - Manual (Page 90)

90 Option settings
Table 21
NT6D42 recommended options for North American and British Telecom
Application
Ringing
frequency Ringing
voltage
Jumper locations Ringing output
North America 20 Hz 86 V ac P5
High voltage
message waiting
Low impedance
British Telecom 25 Hz 80 V ac P4
No high voltage
message waiting
Low impedance
Table 22
NT6D42 jumper locations P4 and P5
High voltage message waiting Pin location
Disable Jumper in P4
Enable Jumper in P5
Note: One jumper must be installed.
Table 23
NT6D42 jumper location J7
Ringing output Jumper location J7
Low impedance (normal) Connect pins 1 and 2
High impedance (Australia) Connect pins 2 and 3
Table 24
NT6D42 SW1
Ringing frequency (Hz) Position SW1
20 1
25 2
50 3
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
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