Nortel Networks Circuit Card User Manual
NT8D09 Analog Message Waiting Line card
Page 557 of 906
Power requirements
Table 180 provides the power requirements for the NT8D09 Analog Message
Waiting Line card.
Waiting Line card.
Foreign and surge voltage protections
In-circuit protection against power line crosses or lightning is not provided on
the NT8D09 Analog Message Waiting line card.
the NT8D09 Analog Message Waiting line card.
Table 180
Power requirements
Power requirements
Voltage
(+/-)
(+/-)
Tolerance
Idle
current
current
Active
current
current
Max
+ 12.0 V dc
0.36 V dc
48 mA
0 mA
48 mA
+ 8.0 V dc
0.40 V dc
150 mA
8 mA
280 mA
–48.0 V dc
2.00 V dc
48 mA
40 mA
688 mA
–48.0 V dc
5.00 V dc
0 mA
10 mA
(Note 1)
(Note 1)
320 mA
86.0 V ac
5.00 V ac
0 mA
10 mA
(Note 2)
(Note 2)
160 mA
–150.0 V dc
3.00 V dc
0 mA
2 mA
32 mA
Note 1: Each active ringing relay requires 10 mA of battery voltage.
Note 2: Reflects the current for ringing a single station set (or DN
telephone). There may be as many as five ringers on each line.
telephone). There may be as many as five ringers on each line.