Nortel Circuit Card Installation Manual page 115

Table 25
NT6D42 SW1
Ringing frequency (Hz)
Table 26
NT6D42CB SW2
Ringing
voltage
86 V ac
86 V ac
80 V ac
80 V ac
75 V ac
75 V ac
70 V ac
70 V ac
20
25
50
Message waiting
voltage
–120 V dc
–150 V dc
–120 V dc
–150 V dc
–120 V dc
–150 V dc
–120 V dc
–150 V dc
Option settings
Position SW1
1
2
3
SW2
1 2
off off
off off
on off
on off
off on
off on
off off
off off
Circuit Card Description and Installation
Page 115 of 906
3 4
off off
off on
off off
off on
off off
off on
on off
on on