| Product Desciption: |
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- Analog message waiting line card provides talk battery and signaling for up to 16 regular 2-wire common battery analog (500/2500-type) telephones and key telephone equipment.
- An Intelligent Peripheral Equipment (IPE) line card that can be installed in the NT8D37 IPE module.
- Up to 16 cards are supported.
- Can also connect a high-voltage, low-current feed to each line to light the message waiting lamp on telephones equipped with the Message Waiting feature.
- This voltage is provided by the NT6D40 Peripheral Equipment Power Supply, DC.
- Cards later than vintage NT8D09AK support ยต-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.
- Caution: 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.
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