[Kamailio-Users] openSER with 200 cps

Hi,

I am analyzing a simple scenario of SIP message exchanges for call setup between two SIP end-point and a sip proxy. The SIP signaling messages for call setup are exchanged between two SIP end-points (using SIPp uac and uas) via the openSER intermediary proxy.

Caller Callee SIPp-UAC --> openSER --> SIPp-UAS

No delay has been set between 180, 200 responses messages sent by callee (SIPp-UAS). After using SIPp to create more than 200 cps, openSER starts sending messages out of order (sending 200 before 180). This causes all calls to fail.

PS: 1000 cps is tested successfully with SIPp excluding openSER.

Is there someone who can give me some advice?

Regards, alirsm