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During a warm transfer between a CUBE with direct routing configuration and MSFT, the CUBE receives a re-invite with replaces header, where the CUBE router start rejecting the call with 422 Session Timer Too Low, even if it receives the default value (1800) is not able to complete the process ### CALL-FLOW =============== 1. ITSP -- > CUBE -- > CUCM -- > CUBE -- > MSFT 2. MSFT -- > REFER -- > CUBE -- > CUCM -- > CUBE -- > PSTN -- > RINGING 3. MSFT -- > RE-INVITE REPLACES -- > 422 Session Timer too small
Blind transfer trying to be completed with replaces header, CUBE with direct routing configuration is rejecting the re-invite with "422 Session Timer Too Low"
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=================== 1. MSFT sends RE-INVITE with: ---------------------------- Aug 25 14:19:39.056: REPLACES: 38a16e7b57a15e71b553ab71a13e359b;from-tag=a8f8a37422654d0cb53fa704a0393dcc;to-tag=F7262EA6-22B3 MIN-SE: 300 SESSION-EXPIRES: 3600 ---------------------------- 2. CUBE displays the following errors: ---------------------------- Aug 25 14:19:39.077: //-1/xxxxxxxxxxxx/SIP/Info/notify/16384/sipSPI_ipip_process_replaces: Consume invite. handle-replaces case. Aug 25 14:19:39.077: //16439393/4A0CEBEF9631/SIP/Error/sipSPIProcessReplaces: Invalid Session-Expires header Aug 25 14:19:39.077: //16439393/4A0CEBEF9631/SIP/Error/sipSPIProcessReplaces: Unable to match existing call leg ! Aug 25 14:19:39.078: //-1/xxxxxxxxxxxx/SIP/Error/ccsip_new_msg_preprocessor: Could not process replaces header ---------------------------- 3. CUBE rejects by 422 Session Timer too small. -- > Aug 25 14:19:39.080: 4. MSFT sends a new INVITE by decrementing the min-se and session-expires values: ---------------------------- Aug 25 14:19:39.712: REPLACES: 38a16e7b57a15e71b553ab71a13e359b;from-tag=a8f8a37422654d0cb53fa704a0393dcc;to-tag=F7262EA6-22B3 MIN-SE: 1800 SESSION-EXPIRES: 1800 ---------------------------- 4. CUBE rejects the INVITE again with 422 Session Timer too small. ---------------------------- Date: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg: Sent: SIP/2.0 422 Session Timer too small Via: SIP/2.0/TLS 52.114.132.46:5061;branch=xxxxxxxxxxxxxxx From: "Call Sample";tag=xxxxxxxxxxxxxxxxxx To: Call-ID: 111111222222333333ccc CSeq: 1 INVITE Min-SE: 1800 Content-Length: 0 ----------------------------