NEC Univerge SV9100 - To Cancel a Callback; To Place a Callback; To Test Callback at a Single Line Telephone

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Operation
To place a Callback:
1. Call unavailable (busy or unanswered) extension.
2. Dial # or press the Callback key (Program 15-07 or SC 851: 35).
3. Hang up.
4. Lift the handset when busy extension calls you back.
 If the unavailable extension was unanswered (not busy), the Callback goes through after your
co-worker uses their telephone for the first time.
 If you have Callback Automatic Answer, you automatically place a call to the formerly busy extension
when you lift the handset. If you do not have Callback Automatic Answer, you must press the ringing
line appearance to place the call.
To cancel a Callback:
1. At the multiline terminal, press Speaker and Dial 870.
- OR -
At the multiline terminal, press Camp-On key (Program 15-07 or SC 851: 35).
- OR -
At the single line telephone, lift the handset and dial 870.
To test Callback at a single line telephone:
1. Lift the handset.
2. Dial 899.
3. Hang up.
4. When the telephone rings, lift the handset.
 You hear the Hold tone.
5. Hang up.