100 Trying Clause Samples
100 Trying. The 100 response is sent whenever there is not immediate response available. It does not have a body. SIP/2.0 100 Trying Via: SIP/2.0/UDP 172.17.2.29:5060 From: IP30 Phone 1 <SIP:▇▇▇▇▇▇▇▇▇▇@172.17.2.29> To: <SIP:▇▇▇▇▇▇▇▇▇▇@172.20.2.31> Call-ID: ▇▇▇▇.▇▇▇▇.A152.3C44.949D.80A7@172.17.2.29 CSeq: 21479 INVITE Content-Length: 0 SIP/2.0 100 Trying Via: SIP/2.0/UDP [3ffe:302:feed:beef:208:74ff:fee1:d3ca]:5060 From: IP30 Phone 1 <SIP:▇▇▇▇▇▇▇▇▇▇@[3ffe:302:feed:ffff::d49d:cdce]> To: <SIP:▇▇▇▇▇▇▇▇▇▇@[3ffe:302:feed:ffff::d49d:cdce]> Call-ID: ▇▇▇▇.▇▇▇▇.A152.3C44.949D.80A7@[3ffe:302:feed:beef:208:74ff:fee1:d3ca] CSeq: 21479 INVITE Content-Length: 0
100 Trying. The Application Server (or SB/SCIM) should return a 100 Trying response to the S-CSC or SB/SCIM Broker immediately upon receipt of the INVITE to prevent un-necessary resends of the INVITE.