Call Forward - AudioCodes Mediant 1000 User Manual

SIP User's Manual
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 (REFER):
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 the following SIP issues:
Transfer is initiated by sending REFER with REPLACES.
The device can receive and act upon receiving REFER with or without REPLACES.
The device 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.

7.14.4 Call Forward

The following forms of call forward are supported:
Immediate: incoming call is forwarded immediately and unconditionally.
Busy: incoming call is forwarded if the endpoint is busy.
No Reply: incoming call is forwarded if it isn't answered for a specified time.
On Busy or No Reply: incoming call is forwarded if the port is busy or when calls are
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.
Three forms of forwarding parties are available:
Served party: party configured to forward the call (FXS device).
Originating party: party that initiated the first call (FXS or FXO device).
Diverted party: new destination of the forwarded call (FXS or FXO device).
The served party (FXS interface) can be configured through the Web interface (refer to
''Call Forward'' on page 222) or ini file to activate one of the call forward modes. These
modes are configurable per device's endpoints.
Notes:
Version 5.4
•
This section is applicable only to Mediant 1000.
•
When call forward is initiated, the device sends a SIP 302 response with
a contact that contains the phone number from the forward table and its
corresponding IP address from the routing table (or when a proxy is
used, the proxy's IP address).
•
For receiving call forward, the device handles SIP 3xx responses for
redirecting calls with a new contact.
439
7. IP Telephony Capabilities
May 2008