Nortel Networks 553-3001-211 manual Damage to Equipment, Type Digitone sets or equivalent

Page 536 of 894 NT8D09 Analog Message Waiting Line card

Note: A maximum of four NT8D09 Analog Message Waiting Line cards per MG 1000S and four NT8D09 Analog Message Waiting Line cards per MG 1000S Expansion are supported.

Cards later than vintage NT8D09AK support µ-Law and A-Law companding, and provide a 2 dB transmission profile change. The transmission change improves performance on long lines, particularly for lines used outside of a single-building environment.

The NT8D09 Analog Message Waiting Line card supports 56K modem operation.

CAUTION

Damage to Equipment

If a modem is connected to a port on the message waiting line card, that port should not be defined in software (LD 10) as having message waiting capabilities. Otherwise, the modem will be damaged.

The NT8D09 Analog Message Waiting Line card interfaces to and is compatible with the equipment listed in Table 172.

Table 172

NT8D09 Analog Message Waiting Line card application and compatibility (Part 1 of 2)

Equipment	Specifications
500-type rotary dial sets (or equivalent):
dial speed	8.0 to 12.5 pps
percent break	58 to 70%
interdigital time	150 ms
2500-type Digitone sets (or equivalent):
frequency accuracy	+ 1.5%
pulse duration	40 ms

553-3001-211 Standard 2.00 September 2004