iPECS UCP
Feature Description and Operation Manual Issue 1.3
410
7.4 SLT Message Wait Indication
Description
All SLT devices will receive a “Stutter” dial tone as an audible indication of a Message
Waiting. In addition, industry standard Message Waiting telephones may be connected to the
system. The system will flash the Message Wait lamp when a messaging is waiting.
Operation
System
Conditions
The system switches the 90 VDC lamp ON and OFF for assigned SLTs indicating a
Message Wait.
1. The system switches a 90 VDC supply ON and OFF to flash the SLT’s neon
Message lamp.
2. Although the SLT Battery Feed is removed during the 90 VDC ON cycle, the
system will recognize a SLT Off-hook event.
3. The SLT must incorporate a 90 VDC neon lamp that is connected directly across
the tip and ring of the voice network.
Programming
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