Polycom IP 320 Administrator's Manual page 132

Administrator's Guide for the SoundPoint IP / SoundStation IP / VVX Family
4 - 70
Web Content Retrieval
Web content is retrieved either spontaneously (active mode) or at the request
of the user (passive mode).
• Active Mode. Two methods can be used to achieve spontaneous web
content retrieval: static configuration parameters or parameters received
as part of the SIP signaling. If parameters received in the SIP signaling
conflict with the static configuration, the parameters in the SIP signaling
will take precedence.
If the phone is configured to spontaneously retrieve web content, the
phone will launch the interactive Microbrowser and have it fetch the
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 behavior, 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 described in
Content Status Indication
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 )
on page 4-69. The Select key can be used to fetch
Web