Call Transfer; Call Forward - AudioCodes Mediant 2000 User Manual

SIP User's Manual

9.14.2 Call Transfer

There are two types of call transfers:

Consultation Transfer:
The common way to perform a consultation transfer is as follows:
In the transfer scenario there are three parties: Party A = transferring, Party B =
transferred, Party C = transferred to.
1. A Calls B.
2. B answers.
3. A presses the hook-flash button and places B on-hold (party B hears a hold tone).
4. A dials C.
5. After A completes dialing C, A can perform the transfer by on-hooking the A
phone.
6. After the transfer is complete, B and C parties are engaged in a call.
The transfer can be initiated at any of the following stages of the call between A and 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:
Blind transfer is performed after we have a call between A and B, and party A decides
to immediately transfer the call to C 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:

9.14.3 Call Forward

When a callRerouting IE is received in a FACILITY message in response to an outgoing
SETUP message, the device sends a SIP 3xx response to the IP side, including the
callRerouting destination number. This is applicable only to the QSIG protocol.
The following forms of call forward are supported:

Immediate:

Busy:

No Reply:

On Busy or No Reply:
not answered after a specified time.

Do Not Disturb: immediately reject incoming calls. Upon receiving a call to Do Not
Disturb call, the 603 Decline SIP response code is sent.
Version 5.8
The device doesn't initiate call transfer, it only responds to call transfer
requests.
incoming call is forwarded immediately and unconditionally.
incoming call is forwarded if the endpoint is busy.
incoming call is forwarded if it isn't answered for a specified time.
incoming call is forwarded if the port is busy or when calls are
433
9. IP Telephony Capabilities
October 2009