Nortel Networks Circuit Card - Manual (Page 114)

Page 114 of 906 Option settings
553-3001-211 Standard 3.00 August 2005
NT6D42 Ringing Generator DC
Tables 22 through 27 list option settings for the NT6D42 Ringing Generator.
Table 22
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 23
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 24
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