Nortel Enterprise 1000 Reference Manual page 232

Page 232 of 236
553-3023-211 Standard 1.00 June 2001
Analog line cards
Frequency response
The loss values in Table 64 are measured relative to the loss at 1 kHz.
Table 64
NT8D09 Analog Message Waiting Line Card frequency response
Frequency
60 Hz
200 Hz
300 Hz
3000 Hz
3200 Hz
3400 Hz
Message channel noise
The message channel noise C-weighted (dBrnC) on 95 percent of the
connections (line to line) with both ends terminated in 600 ohms does not
exceed 20 dBrnC.
Table 65 provides a technical summary of the NT8D09 Analog Message
Waiting Line Card.
Table 65
NT8D09 Analog Message Waiting Line Card technical summary
(Part 1 of 2)
Impedance
Loop limit (excluding
set)
Leakage resistance
Ring trip
Minimum
20.0 dB
0.0 dB
–0.5 dB
–0.5 dB
–0.5 dB
0.0 dB
600 ohms
1000 ohms at nominal -48 V (excluding set)
30,000 ohms
During silent or ringing intervals
Maximum
—
5.0 dB
1.0 dB
1.0 dB
1.5 dB
3.0 dB