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Section 700 - Operation Chapter 7. SLT Features
ICX-50-700 ICX (International) issued June 2000 299
To answer a message waiting indication (Callback):
To cancel a Callback Message:
Hardware Requirements
•N/A
Related Programming
• FF1-0-03: Extension COS (Message Wait set/cancel)
• FF1-0-03: Extension COS (Priority Message Wait set/cancel)
• FF1-2: Dial Plan
• FF3: Extension COS
Considerations
• The System has priority message waiting for 3rd-party voice mail. See “Voice Mail Integration
(Third Party)” on page 69.
Offhook Signalling
Description
Offhook Signalling sends a tone over the handset to a busy extension to indicate that a trunk call has
arrived or a call is camped-on. Prior to Version 5.0, users receiving an offhook signal during a
conversation had to end the call before answering an incoming call. Beginning with Version 5.0, users
receiving an offhook signal during conversation can press and release the hook (hookflash) to place
the current call on hold and answer the incoming call.
After receiving an offhook signal during a call:
Action Result
1. Lift the handset. Stutter dial tone
2. Enter the Message Wait Callback code (default = *6). Telephone automatically dials extension
that set Message Waiting Indication
Action Result
1. Lift the handset. Intercom dial tone
2. Enter the Callback Request Cancel code (default = *5).
3. Replace the handset.
Action Result
1. Complete the first call and place the handset on hook. First call is terminated.
2. After the telephone rings, go off hook. Incoming call is answered.