Grandstream Networks GAC2500 Administration Manual page 72

*71
Enable Call Waiting (For all subsequent calls)
Dial *77+Phone/Ext. Number
Dial
*72
Unconditional Call Forward: Set up unconditional call forward
Dial *72 + Phone/Ext. Number.
Dial
*73
Cancel Unconditional Call Forward: Cancel unconditional call
forward
Dial *73
*74
Enable paging mode directly when dialing up
Dial *74
*82
Selective Cancel Anonymous Call (Current Call)
Dial *82+Phone/Ext. Number
Dial
*90
Busy Call Forward: Set up busy call forward
Dial *90 + Phone/Ext. Number.
Dial
*91
Cancel Busy Call Forward: Cancel busy call forward
Dial*91
*92
Delayed Call Forward: Set up delayed call forward
Dial *92 + Phone/Ext. Number.
Dial
*93
Cancel Delayed Call Forward: Cancel busy call forward
Dial*93
GAC2500 Administration Guide
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