Call Forward - 3Com VCX v7111 User Manual

The transfer can be initiated at any of the following stages of the call between A to C:
Just after completing dialing C phone number – Transfer from setup
While hearing Ringback – Transfer from alert
While speaking to C – Transfer from active
Blind transfer is performed after we have a call between A and B, and party A decides to
transfer the call to C immediately without speaking with C.
The result of the transfer is a call between B and C (just like consultation transfer only
skipping the consultation stage).
Note the following SIP issues:
Transfer is initiated by sending REFER with REPLACES.
The gateway can receive and act upon receiving REFER with or without REPLACES.
The gateway can receive and act upon receiving INVITE with REPLACES, in which case
the old call is replaced by the new one.
The INVITE with REPLACES can be used to implement Directed Call Pickup.

Call Forward

Five forms of call forward are supported:
Immediate: Any incoming call is forwarded immediately and unconditionally.
Busy: Incoming call is forwarded if the endpoint is busy.
No Reply: The incoming call is forwarded if it isn't answered for a specified time.
On Busy or No Reply: Forward incoming calls when the port is busy or when calls are
not answered after a specified time.
Do Not Disturb: Immediately reject incoming calls. Upon receipt of a Do Not Disturb call,
the gateway responds with a 603 Decline SIP code.
Three forms of forwarding parties are available:
Served party: the party that is configured to forward the call (V7111/FXS)
Originating party: the party that initiated the first call (V7111/FXS or FXO)
Diverted party: the new destination of the forwarded call (V7111/FXS or FXO)
The served party (V7111/FXS) can be configured through the Web browser (see
Caller ID to Tel) or using ini file to activate one of the call forward modes. These modes are
configurable per gateway's endpoint.
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3Com VCX V7111 VoIP Gateway User Guide
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