
SIP User's Manual 360 Document #: LTRT-65411
MediaPack Series
• After A completes dialing C, A can perform the transfer by on-hooking the A
phone.
• 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 (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).
Notes:
• 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 178) o
r ini file to activate one of the call forward modes. These
modes are configurable per device's endpoints.
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