Power Requirements; Foreign And Surge Voltage Protections; Overload Level - Meridian Nortel 1 Option 11C Technical Reference Manual

Page 376 of 544

Power requirements

Table 112
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. There may be as many as five ringers on each
line.

Foreign and surge voltage protections

Overload level

553-3011-100 Standard 14.00
NT8D09 Analog Message Waiting Line Card
Table provides the power requirements for the 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
In-circuit protection against power line crosses or lightning is not provided on
the Analog Message Waiting line card. When the Analog line card is used to
service off-premise telephones, the NTAK92 Off-premise protection module
must be used. Check local regulations before providing such service.
Signal levels exceeding +7 dBm applied to the tip and ring cause distortion in
speech transmission.
January 2002
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
Max
48 mA
280 mA
688 mA
320 mA
160 mA
32 mA