User`s manual

Version 5.4 437 May 2008
SIP User's Manual 7. IP Telephony Capabilities
7.14 Working with Supplementary Services
The device supports the following supplementary services:
Call Hold and Retrieve (refer to ''Call Hold and Retrieve'' on page 437).
Consultation / Alternate (refer to "Consultation / Alternate" on page 438).
Call Transfer (refer to ''Call Transfer'' on page 438).
Call Forward: analog interface - 3xx Redirect Responses; digital interface - when a
callRerouting IE is received in a FACILITY message in response to an outgoing
SETUP message, the device sends a 3xx response to the IP side, including the
callRerouting destination number - only applicable to QSIG protocol (refer to "Call
Forward" on page 439).
Call Waiting - 182 Queued Response (refer to "Call Waiting" on page 440).
Message Waiting Indication - MWI (refer to "Message Waiting Indication" on page
440).
Caller ID (refer to "Caller ID" on page 441).
To activate these supplementary services (Hold, Transfer, Forward, Waiting and MWI) on
the device, enable each service’s corresponding parameter either from the Web interface
or via the ini file.
Notes:
All call participants must support the specific supplementary service that
is used.
When working with certain application servers (such as BroadSoft’s
BroadWorks) in client server mode (the application server controls all
supplementary services and keypad features by itself), the device's
supplementary services must be disabled.
7.14.1 Call Hold and Retrieve
Initiating Hold / Retrieve:
Active calls can be put on-hold by pressing the phone's hook-flash button.
The party that initiates the hold is called the holding party; the other party is called the
held party.
After a successful Hold, the holding party hears a Dial Tone (HELD_TONE, defined in
the device's Call Progress Tones file).
Call retrieve can be performed only by the holding party while the call is held and
active.
The holding party performs the retrieve by pressing the hook-flash.
After a successful retrieve, the voice is connected again.
Hold is performed by sending Re-INVITE message with IP address 0.0.0.0 or
a=sendonly in the SDP according to the parameter HoldFormat.