IP Telephony and Phones

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Hi All,   We are facing issue while making outbound calls as we are hearing ring back tone( 1-2 rings) before actual PSTN phone rings and also if PSTN Phone is switched off it initially gives ringback than we get switch off message. We are using SIP ...

Hello,  My client has CUCM System version: 7.1.5.31900-3. He have to change IP address of CUCM. He use IP address as hostname. Should he have to rehost license file after reip?  

mayorovsv by Level 1
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Hi, For a specific dialed / outgoing number call drops after 4 rings. I found this "500 Internal Server" error as i collect logs from Call manager.   SIP/2.0 500 Internal Server ErrorVia: SIP/2.0/TCP 172.16.8.16:5060;branch=z9hG4bK191c876ad3b6bFrom...