In this example, the incorrect length also included part of the SDP. This generated an additional error message because there was a duplicate Content-Length header :
``` INVITE sip:+49xxxxxxxxxx@bob.com;transport=udp;user=phone SIP/2.0 Call-ID: 02817-MD-4463d585-52e48e045@c4swlmgc2.alice.com Contact: sip:212.xxx.xxx.xxx:5060 Content-Type: application/sdp CSeq: 1133935713 INVITE From: "0xxxxxxxxxx" sip:+49xxxxxxxxxx@alice.com;user=phone;tag=02817-RD-4463d586-4f6eb2e21 Max-Forwards: 66 Record-Route: sip:212.xxx.xxx.xxx:5060;user=00048987;lr;Cpkt=S;C=on-cirpack Route: sip:bob.com;transport=udp;lr Supported: histinfo To: sip:+49xxxxxxxxxx@bob.com;user=phone Via: SIP/2.0/UDP 212.xxx.xxx.xxx:5060;branch=z9hG4bK-SBUV-07e9a5a9-120bc337 P-Early-Media: supported User-Agent: Cirpack Allow: INVITE,ACK,UPDATE,BYE,CANCEL,OPTIONS P-Asserted-Identity: "0xxxxxxxxxx"sip:+49xxxxxxxxxx@alice.com;user=phone P-Charging-Vector: icid-value="IBCF-1-172198114070166333715934";orig-ioi=3GPP-UTRAN Content-Length: 248
v=0 o=anonymous 172198114002 172198114002 IN IP4 212.xxx.xxx.xxx s=SIP Call c=IN IP4 212.xxx.xxx.xxx t=0 0 m=audio 31096 RTP/AVP 8 101 b=AS:82 a=rtpmap:8 PCMA/8000/1 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=ptime:20 a=sendrecv
INVITE sip:+49xxxxxxxxxx@bob.com;transport=udp;user=phone SIP/2.0 Record-Route: sip:172.xxx.xxx.xxx;r2=on;lr=on;ftag=02817-RD-4463d586-4f6eb2e21 Record-Route: sip:92.xxx.xxx.xxx;r2=on;lr=on;ftag=02817-RD-4463d586-4f6eb2e21 Call-ID: 02817-MD-4463d585-52e48e045@c4swlmgc2.alice.com Contact: sip:212.xxx.xxx.xxx:5060 Content-Type: application/sdp CSeq: 1133935713 INVITE From: "0xxxxxxxxx" sip:+49xxxxxxxxx@alice.com;user=phone;tag=02817-RD-4463d586-4f6eb2e21 Max-Forwards: 65 Record-Route: sip:212.xxx.xxx.xxx:5060;user=00048987;lr;Cpkt=S;C=on-cirpack Supported: histinfo To: sip:+49xxxxxxxxx@bob.com;user=phone Via: SIP/2.0/UDP 172.xxx.xxx.xxx;branch=z9hG4bKfc7e.32b1e1b8641843f6f10ffaa78b49ad63.0 Via: SIP/2.0/UDP 212.xxx.xxx.xxx:5060;branch=z9hG4bK-SBUV-07e9a5a9-120bc337 User-Agent: Cirpack Allow: INVITE,ACK,UPDATE,BYE,CANCEL,OPTIONS P-Asserted-Identity: "0xxxxxxxxx"sip:+49xxxxxxxxx@alice.com;user=phone P-Charging-Vector: icid-value="IBCF-1-172198114070166333715934";orig-ioi=3GPP-UTRAN Content-Length: 258 icid-value="IBCF-1-172198114070166333715934";orig-ioi=3GPP-UTRAN Content-Length: 248
v=0 o=a v=0 o=anonymous 172198114002 172198114002 IN IP4 92.xxx.xxx.xxx s=SIP Call c=IN IP4 92.xxx.xxx.xxx t=0 0 m=audio 40848 RTP/AVP 8 101 b=AS:82 a=rtpmap:8 PCMA/8000/1 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=sendrecv a=rtcp ```