Kamailio 1.5: U 127.0.0.1:5061 -> 127.0.0.1:5060 INVITE sip:49721123456785@127.0.0.1:5060 SIP/2.0. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-11980-1-0. From: sipp ;tag=11980SIPpTag001. To: sut . Call-ID: 1-11980@127.0.0.1. CSeq: 1 INVITE. Contact: sip:sipp@127.0.0.1:5061. Max-Forwards: 70. Subject: Performance Test. Content-Type: application/sdp. Content-Length: 127. . v=0. o=user1 53655765 2353687637 IN IP4 127.0.0.1. s=-. c=IN IP4 127.0.0.1. t=0 0. m=audio 6001 RTP/AVP 0. a=rtpmap:0 PCMU/8000 # U 127.0.0.1:5060 -> 127.0.0.1:5061 SIP/2.0 100 Giving a try. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-11980-1-0. From: sipp ;tag=11980SIPpTag001. To: sut . Call-ID: 1-11980@127.0.0.1. CSeq: 1 INVITE. Server: Kamailio (1.5.1-notls (i386/linux)). Content-Length: 0. . # U 127.0.0.1:5060 -> 127.0.0.1:10000 INVITE sip:49721123456785@127.0.0.1:10000 SIP/2.0. Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKec79.baf86485.0. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-11980-1-0. From: sipp ;tag=11980SIPpTag001. To: sut . Call-ID: 1-11980@127.0.0.1. CSeq: 1 INVITE. Contact: sip:sipp@127.0.0.1:5061. Max-Forwards: 69. Subject: Performance Test. Content-Type: application/sdp. Content-Length: 127. . v=0. o=user1 53655765 2353687637 IN IP4 127.0.0.1. s=-. c=IN IP4 127.0.0.1. t=0 0. m=audio 6001 RTP/AVP 0. a=rtpmap:0 PCMU/8000 # U 127.0.0.1:10000 -> 127.0.0.1:5060 SIP/2.0 503 Service Unavailable. Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKec79.baf86485.0, SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-11980-1-0. From: sipp ;tag=11980SIPpTag001. To: sut ;tag=1. Call-ID: 1-11980@127.0.0.1. CSeq: 1 INVITE. Contact: . Content-Type: application/sdp. Content-Length: 127. . v=0. o=user1 53655765 2353687637 IN IP4 localhost. s=-. c=IN IP4 localhost. t=0 0. m=audio 6000 RTP/AVP 0. a=rtpmap:0 PCMU/8000 # U 127.0.0.1:5060 -> 127.0.0.1:10000 ACK sip:49721123456785@127.0.0.1:10000 SIP/2.0. Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKec79.baf86485.0. From: sipp ;tag=11980SIPpTag001. Call-ID: 1-11980@127.0.0.1. To: sut ;tag=1. CSeq: 1 ACK. Max-Forwards: 70. User-Agent: Kamailio (1.5.1-notls (i386/linux)). Content-Length: 0. . # U 127.0.0.1:5060 -> 127.0.0.1:10000 INVITE sip:49721123456785@127.0.0.1:10000 SIP/2.0. Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKec79.baf86485.1. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-11980-1-0. From: sipp ;tag=11980SIPpTag001. To: sut . Call-ID: 1-11980@127.0.0.1. CSeq: 1 INVITE. Contact: sip:sipp@127.0.0.1:5061. Max-Forwards: 69. Subject: Performance Test. Content-Type: application/sdp. Content-Length: 127. . v=0. o=user1 53655765 2353687637 IN IP4 127.0.0.1. s=-. c=IN IP4 127.0.0.1. t=0 0. m=audio 6001 RTP/AVP 0. a=rtpmap:0 PCMU/8000 # U 127.0.0.1:10000 -> 127.0.0.1:5060 SIP/2.0 486 Busy Here. Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKec79.baf86485.1, SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-11980-1-0. From: sipp ;tag=11980SIPpTag001. To: sut ;tag=1. Call-ID: 1-11980@127.0.0.1. CSeq: 1 INVITE. Contact: . Content-Type: application/sdp. Content-Length: 127. . v=0. o=user1 53655765 2353687637 IN IP4 localhost. s=-. c=IN IP4 localhost. t=0 0. m=audio 6000 RTP/AVP 0. a=rtpmap:0 PCMU/8000 # U 127.0.0.1:5060 -> 127.0.0.1:10000 ACK sip:49721123456785@127.0.0.1:10000 SIP/2.0. Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKec79.baf86485.1. From: sipp ;tag=11980SIPpTag001. Call-ID: 1-11980@127.0.0.1. To: sut ;tag=1. CSeq: 1 ACK. Max-Forwards: 70. User-Agent: Kamailio (1.5.1-notls (i386/linux)). Content-Length: 0. . # U 127.0.0.1:5060 -> 127.0.0.1:5061 SIP/2.0 486 Busy Here. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-11980-1-0. From: sipp ;tag=11980SIPpTag001. To: sut ;tag=1. Call-ID: 1-11980@127.0.0.1. CSeq: 1 INVITE. Contact: . Content-Type: application/sdp. Content-Length: 127. . v=0. o=user1 53655765 2353687637 IN IP4 localhost. s=-. c=IN IP4 localhost. t=0 0. m=audio 6000 RTP/AVP 0. a=rtpmap:0 PCMU/8000 # U 127.0.0.1:5061 -> 127.0.0.1:5060 ACK sip:49721123456785@127.0.0.1:5060 SIP/2.0. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-11980-1-0. From: sipp ;tag=11980SIPpTag001. To: sut ;tag=1. Call-ID: 1-11980@127.0.0.1. CSeq: 1 ACK. Contact: . Max-Forwards: 70. Subject: Performance Test. Content-Length: 0. . sip-router: U 127.0.0.1:5061 -> 127.0.0.1:5060 INVITE sip:49721123456785@127.0.0.1:5060 SIP/2.0. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-12100-1-0. From: sipp ;tag=12100SIPpTag001. To: sut . Call-ID: 1-12100@127.0.0.1. CSeq: 1 INVITE. Contact: sip:sipp@127.0.0.1:5061. Max-Forwards: 70. Subject: Performance Test. Content-Type: application/sdp. Content-Length: 127. . v=0. o=user1 53655765 2353687637 IN IP4 127.0.0.1. s=-. c=IN IP4 127.0.0.1. t=0 0. m=audio 6001 RTP/AVP 0. a=rtpmap:0 PCMU/8000 # U 127.0.0.1:5060 -> 127.0.0.1:5061 SIP/2.0 100 trying -- your call is important to us. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-12100-1-0. From: sipp ;tag=12100SIPpTag001. To: sut . Call-ID: 1-12100@127.0.0.1. CSeq: 1 INVITE. Server: Sip EXpress router (2.1.0-dev23-make (i386/linux)). Content-Length: 0. Warning: 392 127.0.0.1:5060 "Noisy feedback tells: pid=12048 req_src_ip=127.0.0.1 req_src_port=5061 in_uri=sip:49721123456785@127.0.0.1:5060 out_uri=sip:49721123456785@127.0.0.1:10000 via_cnt==1". . # U 127.0.0.1:5060 -> 127.0.0.1:10000 INVITE sip:49721123456785@127.0.0.1:10000 SIP/2.0. Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bK55e7.ae44cc16.0. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-12100-1-0. From: sipp ;tag=12100SIPpTag001. To: sut . Call-ID: 1-12100@127.0.0.1. CSeq: 1 INVITE. Contact: sip:sipp@127.0.0.1:5061. Max-Forwards: 69. Subject: Performance Test. Content-Type: application/sdp. Content-Length: 127. . v=0. o=user1 53655765 2353687637 IN IP4 127.0.0.1. s=-. c=IN IP4 127.0.0.1. t=0 0. m=audio 6001 RTP/AVP 0. a=rtpmap:0 PCMU/8000 # U 127.0.0.1:10000 -> 127.0.0.1:5060 SIP/2.0 503 Service Unavailable. Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bK55e7.ae44cc16.0, SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-12100-1-0. From: sipp ;tag=12100SIPpTag001. To: sut ;tag=1. Call-ID: 1-12100@127.0.0.1. CSeq: 1 INVITE. Contact: . Content-Type: application/sdp. Content-Length: 127. . v=0. o=user1 53655765 2353687637 IN IP4 localhost. s=-. c=IN IP4 localhost. t=0 0. m=audio 6000 RTP/AVP 0. a=rtpmap:0 PCMU/8000 # U 127.0.0.1:5060 -> 127.0.0.1:5061 SIP/2.0 503 Service Unavailable. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-12100-1-0. From: sipp ;tag=12100SIPpTag001. To: sut ;tag=1. Call-ID: 1-12100@127.0.0.1. CSeq: 1 INVITE. Contact: . Content-Type: application/sdp. Content-Length: 127. . v=0. o=user1 53655765 2353687637 IN IP4 localhost. s=-. c=IN IP4 localhost. t=0 0. m=audio 6000 RTP/AVP 0. a=rtpmap:0 PCMU/8000 # U 127.0.0.1:5061 -> 127.0.0.1:5060 ACK sip:49721123456785@127.0.0.1:5060 SIP/2.0. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-12100-1-0. From: sipp ;tag=12100SIPpTag001. To: sut ;tag=1. Call-ID: 1-12100@127.0.0.1. CSeq: 1 ACK. Contact: . Max-Forwards: 70. Subject: Performance Test. Content-Length: 0. . # U 127.0.0.1:5060 -> 127.0.0.1:10000 ACK sip:49721123456785@127.0.0.1:10000 SIP/2.0. Via: SIP/2.0/UDP 127.0.0.1;branch=0. Via: SIP/2.0/UDP 127.0.0.1:5061;branch=z9hG4bK-12100-1-0. From: sipp ;tag=12100SIPpTag001. To: sut ;tag=1. Call-ID: 1-12100@127.0.0.1. CSeq: 1 ACK. Contact: . Max-Forwards: 69. Subject: Performance Test. Content-Length: 0. .