Aastra Telecom 41-001343-02 manual Custom Ad-Hoc Conference, SIP Join Feature for 3-Way Conference

Operational Features

Custom Ad-Hoc Conference

Previously, the phone will wait for server response prior to completing the ad-hoc and centralized conference feature. This results in an interoperability issue with certain call managers, such as Genband. Now the phone no longer waits for server response before referring the call to the conference host when the "custom adhoc conference" parameter is enabled.

Configuring the “Custom AD-Hoc Conference” Feature Using the Configuration Files

You use the following parameters to configure the “Custom AD- Hoc Conference” feature in the configuration files:

•custom adhoc conference

Configuration Files

For specific parameters you can set in the configuration files, see Appendix A, the section, “Custom Ad-Hoc Conference” on page A-80.

“SIP Join” Feature for 3-Way Conference

The IP Phones support a feature referenced in RFC 3911, which allows an additional caller to join an active call between two parties if the caller knows the dialog information. This feature begins a conference using a join header as described in RFC 3911.

The “SIP Join“ feature provides the following:

•Security via the whitelist (which is a feature that already exists on the phone).

•Initiates an offhook action uri when it is answered.

•Initiates an onhook action uri at call termination.

•Creates a caller list entry.

This feature is disabled by default. You can enable the “SIP Join” feature by setting the “sip join support” parameter in the configuration files.

Limitations of the “SIP Join” Feature

The following are limitations of the “SIP Join” feature:

•Not applicable to a conference call already in progress.

•Not applicable to a CT handset that has two active calls.

•Not applicable to a phone mixing RTP.

•Allows secondary parties to join calls if they can determine the dialog parameters. In order to provide security, it is rec- ommended that the Administrator configure the SIP whitelist.

•Not applicable while the active call between two parties is in the early dialog state.

Configuring the “SIP Join” Feature Using the Configuration Files

You use the following parameters to configure the “SIP Join feature in the configuration files:

sip join support

Configuration Files

For specific parameters you can set in the configuration files, see Appendix A, the section, “SIP Join Feature for 3-Way Conference” on page A-80.

41-001343-02 REV04 – 05.2014 5-271