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Conference Calls
A conference call is a conversation involving two or more remote parties. To start a conference, there must
be at least two calls and with at least one of them in the Connected state and the other in the Holding state.
Your phone supports two methods to conference multiple parties:
● Local mixing/bridging
● External conference bridge
Local Mixing or Bridging
After starting three-way conference calls, you can see the two remote parties in the Connected state.
External Conference Bridge
You can connect only SIP or SP calls with the external conference bridge. When using an external
conference bridge, the conference size is not limited by the phone but by the conference bridge itself. Check
with your conference service provider on the conference size limit.
To start a three-way conference, the phone first sends a new INVITE to the SIP URL of the conference
bridge to request the conference resources. Once successful, the conference bridge replies back with a 2xx
response contact header that includes the context information for other participants to access the bridge for
this conference call.
Enable an External Conference Bridge
You can configure the conference bridge and enable it with the Phone Settings option.
To enable an external conference bridge:
1 Configure the X_ConferenceBridge parameter on the SPn Service web page with the userid or
(SIP) URL of the external conference bridge.
2 Enable the option DECT Wireless::HandsetX::Calling
Features::UseExternalConferenceBridge.
X refers to the numbers(1-8) of the handset.
The OPUS codec doesn’t support three-way calling with both legs using OPUS.
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