Polycom SIP 3.1 manual Settings Menu, Signaling Changes

Configuring Your System

appropriate URL upon arrival of the appropriate SIP signaling, subject to some conditions described below.

Since new web content URLs can be received at any time—as the first URL for a call or a replacement URL—rules are needed to match displayed web content with automatic phone behaviour, which are valid actions from within the Microbrowser context.

Spontaneous web content will only be retrieved and displayed for a call if that call occupies, or will occupy, the UI focus at the time of the event.

•Passive Mode. Web content can also be retrieved when the user chooses to do so. The fact that web content is available for viewing is shown through the call appearance-based web content icon descibed in Web Content Status Indication on page 4-66. The Select key can be used to fetch the associated web content for the call that is in focus. If the web content has expired, the icon will be removed and the Select key will perform no function.

Passive mode is recommended for applications where the Microbrowser is used for other applications. In the SIP 2.2 feature, interactive microbrowser sessions will be interrupted by the arrival of active-mode web content URLs, which may cause annoyance, although the Back navigation function will work in this context.

Settings Menu

If enabled, a new SIP web content entry is added to the Setting > Basic > Preferences menu to allow the user to change the current content retrieval mode. Two options are provided: passive mode and active mode.

Signaling Changes

A new SIP header must be used to report web content associated with SIP phone calls (the SSAWC header follow the BNF for the standard SIP header Alert-Info):

Alert-Info = "Alert-Info" HCOLON alert-param *(COMMA alert-param) alert-param = LAQUOT absoluteURI RAQUOT *( SEMI generic-param )

The web content must be located with an absolute URI, which begins with the scheme identifier. Currently only the HTTP scheme is supported.

So an example header might look like:

Access-URL: <http://server.polycom.com/content23456.xhtml>

This header may be placed in SIP requests and responses, as appropriate so long as the messages are part of an INVITE-initiated dialog and the phone can associate them with an existing phone call.

This feature also requires the definition of two optional parameters:

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