Hello,

the 481 is sent by the caller, meaning it doesn't know the call anymore.

To help troubleshooting, you have to send the full sip trace of the call, from initial invite to the bye, including the responses, taken on sip server, in both directions.

You can use ngrep, like:

ngrep -d any -qt -W byline "sip" port 5060

Cheers,
Daniel

On 30/03/16 19:14, Humberto H wrote:

Hello;

HOW can I send 4XX to the caller when the callee response to a BYE message is:

481 Call leg/transaction does not exist. BUT the caller is waiting.

Before this message. I drop the bye sent by the callee, my purpose here is

"Do not send the BYE TO THE CALLER"

JUST send a message in order to the caller do failover, If I send BYE to the caller it can't do failover

Thanks in advance.

10.929596| | BYE | | |SIP Request BYE CSeq:104

| | |(5060) ------------------> (5060) | |

|10.929981| | 481 Call leg/transac | |SIP Status 481 Call leg/transaction does not exist

| | |(5060) <------------------ (5060) | |

|10.929983| | 481 Call leg/transac | |SIP Status 481 Call leg/transaction does not exist

Call leg/transaction does not exist

| | |(5060) ------------------> (5060) | |

|10.930445| | 481 Call leg/transac | |SIP Status 481 Call leg/transaction does not exist

| | |(5060) ------------------> (5060) | |

|10.930451| | 481 Call leg/transac | |SIP Status 481 Call leg/transaction does not exist
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