Nortel Networks Circuit Card - Manual (Page 557)

NT8D09 Analog Message Waiting Line card Page 557 of 906
Circuit Card Description and Installation
Power requirements
Table 180 provides the power requirements for the NT8D09 Analog Message
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.
Table 180
Power requirements
Voltage
(+/-)
Tolerance
Idle
current Active
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) 320 mA
86.0 V ac 5.00 V ac 0 mA 10 mA
(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.