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No Ringback Tone for calls from SIP Trunk to IP Phones

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ErrorMagnet

ErrorMagnet

Technical User
Mar 21, 2006
19
NO
A third party system with softphone clients is integrated to CUCM4.1 over a SIP Trunk. Calls flow pretty OK in both directions, but inbound calls from third party system to Cisco IP Phones hear no Ringback Tone. Any ideas what to check?
 
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