Grandstream Networks GXP1100 User Manual page 20

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Enable Call Waiting (per Call)
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*71
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Unconditional Call Forward. To set up unconditional call forward:
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*72
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Cancel Unconditional Call Forward. To cancel the unconditional call forward:
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*73
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Busy Call Forward. To set up busy call forward:
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*90
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Cancel Busy Call Forward. To cancel the busy call forward:
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*91
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Delayed Call Forward. To set up delayed call forward:
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*92
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Cancel Delayed Call Forward. To cancel the delayed call forward:
*93
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FIRMWARE VERSION 1.0.4.23
Off hook the phone;
Dial *70 and then enter the number to dial out.
Off hook the phone;
Dial *71 and then enter the number to dial out.
Pick up the handset;
Dial *72. A dial tone will be heard;
Enter the forwarding number;
Press # or SEND key;
The call will hang up automatically with unconditional call forward set up.
Pick up the handset;
Dial *73. A short tone will be heard;
Wait for the call to hang up. The unconditional call forward is cancelled.
Pick up the handset;
Dial *90 followed by forwarding number;
Press # or SEND key;
The call will hang up automatically with busy call forward set up.
Pick up the handset;
Dial *91. A short tone will be heard;
Wait for the call to hang up. The busy call forward is cancelled.
Pick up the handset;
Dial *92 followed by forwarding number;
Press # or SEND key;
The call will hang up automatically with delayed call forward set up.
Pick up the handset;
GXP1100/GXP1105 USER MANUAL Page 20 of 46