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Cisco Bug: CSCta16901 - SIP MR: Phone can answer unknown source SIP message

Last Modified

May 14, 2010

Products (1)

  • Cisco Unified IP Phone 7900 Series

Known Affected Releases


Description (partial)

When SIP phone registered to CUCM in TCP connection, it shouldl not answer SIP  messages which is sent other than CUCM. But when this bug happens, phone can ring and answer the UDP SIP INVITE messages even it is registered to CUCM.

Please compare the 8-5-3MN1-5S and 9-0-1FT4-7S log in attachment for further reference
Phone receives SIP UDP message from unknow UAC or proxy.
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