C 8: T C; Hapter Elephony Apabilities; Working With Supplementary Services; Call Hold And Retrieve - 3Com VCX v7111 User Manual

C 8: T
HAPTER

Working with Supplementary Services

The V7111 SIP FXS and FXO gateways support the following supplementary services:
Call Hold / Retrieve; see
Consultation / Alternate; see
Transfer (Refer + Replaces); see
Call Forward (3xx Redirect Responses); see
Call Waiting (182 Queued Response); see
Message Waiting Indication (MWI); see
To activate these supplementary services (Hold, Transfer, Forward, Waiting and MWI) on the
V7111 gateway, enable each services corresponding parameter either from the Web
Interface or using the ini file. Note that all call participants must support the specific used
method.
When working with application servers (such as BroadSoft's BroadWorks) in client
server mode (the application server controls all supplementary services and keypad
features by itself), the gateways supplementary services must be disabled.

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.
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, voice is connected again.
Hold is performed by sending a REINVITE with the IP address 0.0.0.0 or a=sendonly in
the SDP according to the parameter HoldFormat.
®
3Com VCX V7111 VoIP Gateway User Guide
ELEPHONY
Call Hold and Retrieve.
Consultation / Alternate.
Call Transfer.
Call
Call
Message Waiting
C
APABILITIES
Forward.
Waiting.
Indication.
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