Configuring Advanced Features
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This chapter provides information for making configuration changes for the following
advanced features:
The Distinctive Ring Tones feature allows specific incoming calls to trigger the IP phone
to play distinctive ring tones. The IP phone inspects the "Alert-Info" header in the INVITE
request when receiving an incoming call. If the INVITE request contains an "Alert-Info"
header, the IP phone strips out the URL and keyword parameter and maps it to the
appropriate ring tone. The followings are two examples of "Alert-Info" headers and the
italicized text is a placeholder for the actual value:
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