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SBC is enhanced to support playing tones locally based on SIP Alert-Info header using the IP Signaling Profile (IPSP) acceptAlertInfo flag. Alert-Info header triggers tone generation when a SIP backward response message (180 with or without SDP) is received. The 180 ringing message with Alert-info header can be received before or after cut through. The tone-id included in Alert-Info header is used as a key word in the tone package locally configured on the SBC. This feature is supported over the SIP and SIP-I interface.The ISUP MIME body parameters do not have any interaction with Alert-Info header when this feature is used.
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The tone as defined above is used as a string to match the tone type specified in the "Signaling Tone Package" associated with the "Tone and Announcement Profile" selected by the PSX for the call. Additionally, it can also be in the format <http:/null>, indicating that any existing media/tone being played is stopped.
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See Alert-Info Header Support in CLI for associated CLI changes. |
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Common Ip Attributes - Flags and Common Ip Attributes - Flags for CLI and EMA changes respectively. |
Alert-Info header Play Tone
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Overview
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