Hello,

In bypass-media mode freeswitch locally acks the 200 ok (SDP), that leads to some Race condition when the party that answered the 200 sends a quick reinvite after Just after the Ack.

I tried on 1.10.1 and 1.10.5, with and without late-negociation, but couldn’t figure how to avoid this.

Has one of you experienced it or have any idea about this ?

          SBC                FREESWITCH                PBX

+---------          ----------+---------          ----------+

|        INVITE (SDP)         |                             |

| --------------------------> |                             |

|         100 Trying          |                             |

| <-------------------------- |                             |

|                             |        INVITE (SDP)         |

|                             | --------------------------> |

|                             |         100 Trying          |

|                             | <-------------------------- |

|                             |         180 Ringing         |

|                             | <-------------------------- |

|         180 Ringing         |                             |

| <-------------------------- |                             |

|                             |        200 OK (SDP)         |

|                             | <-------------------------- |

|                             |             ACK             |

|                             | --------------------------> |

|        200 OK (SDP)         |                             |

| <-------------------------- |                             |

|                             |        INVITE (SDP)         |

|                             | <-------------------------- |

|                             |             100             |

|                             | --------------------------> |

|        INVITE (SDP)         |                             |

| <-------------------------- |                             |

|             100             |                             |

| --------------------------> |                             |

|             491             |                             |

| --------------------------> |                             |

|                             |             491             |

|                             | --------------------------> |

Regards,

David