Technical Summary Or Electrical Specifications - Avaya Nortel Communication Server 1000 Reference

NT8D09 Analog Message Waiting Line card
Power for lighting the message waiting lights is provided by either the peripheral equipment
power supply or the ringing generator. Logic on the message waiting line card interrupts the –
150 V DC signal at 1 Hz intervals to provide a flashing message waiting light.

Technical summary or electrical specifications

Analog line interface
The NT8D09 Analog Message Waiting Line Card meets the EIA/TA464 standard for ONS Type
II line cards.
characteristics
characteristics.
Table 162: Analog message waiting line card - line interface unit electrical
characteristics
Characteristics
Impedance
Loop limit (excluding
telephone)
Leakage resistance
Ring trip
Ringing voltage
Signaling
Supervision
Power input from backplane
Insertion loss
Input impedance
The impedance at tip and ring is 600 ohms with a return loss of:
• 20 dB for 200-500 Hz
• 26 dB for 500-3400 Hz
370 Circuit Card Reference
Table 162: Analog message waiting line card - line interface unit electrical
on page 370 shows a summary of the analog line interface unit electrical
600 ohms
1000 ohms at nominal –48 V (excluding telephone)
30,000 ohms
During silent or ringing intervals
86 V ac
Loop start
Normal battery conditions are continuously applied
(approximately –44.5 V on ring and –2.5 V on tip at nominal
–48 V battery)
–48 (can be as low as –42 for DC-powered systems), +15,
+8.5, –150 V and ringing voltage
4 dB ±1 dB at 1020 Hz
3.5 dB loss for analog to PCM
0.5 dB loss for PCM to analog
Comments? infodev@avaya.com
Description
July 2011