Nortel Circuit Card Installation Manual page 557

Power requirements
Table 180 provides the power requirements for the NT8D09 Analog Message
Waiting Line card.
Table 180
Power requirements
Voltage
(+/-)
+ 12.0 V dc
+ 8.0 V dc
–48.0 V dc
–48.0 V dc
86.0 V ac
–150.0 V dc
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.
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.
NT8D09 Analog Message Waiting Line card
Tolerance
0.36 V dc
0.40 V dc
2.00 V dc
5.00 V dc
5.00 V ac
3.00 V dc
Idle Active
current current
48 mA 0 mA
150 mA 8 mA
48 mA 40 mA
0 mA 10 mA
(Note 1)
0 mA 10 mA
(Note 2)
0 mA 2 mA
Circuit Card Description and Installation
Page 557 of 906
Max
48 mA
280 mA
688 mA
320 mA
160 mA
32 mA