#Sip and play full

Now letвЂ™s break it up or dissect this piece of information.ДЄs we can see there are lots of headers in this inviteвЂ¦ Note this is very similar to what a debug ccsip messages will produce on a CUBE gateway.Д¬UCM-sip trunk->CUBE-SIP Trunk->ITSP LetвЂ™s look at a sample SIP trace from CUCM.

#Sip and play full

Headers are key parameters within the SIP invite and we shall look at them so as to gain full clarity of whatвЂ™s going on. To identify the caller, the called number, the media information and resources advertised in the Invite, SIP invites use headers. If an INVITE does not contain media information, the ACK contains the media information of the UAC. The message body can also contain other session information, suchДЄs a resource list in the case of an early offer. Telephony, it is similar to a Setup message in ISDNДЄn INVITE usually has a message body containing the media information The INVITE method is used to establish media sessions between user agents. The INVITE, REGISTER, BYE, ACK, CANCEL, and OPTIONS methods are the original six methods There are Six SIP methods described in the SIP specification document RFC 3261. Ok enough of grammars, lets dive in! Ready?ДЄn Invite is a SIP requests called methods.

They help us to understand the language been spoken so we are not lost like a non French speaking man in Paris! These messages are key in knowing whatвЂ™s going on. We will look at these messages as we try to understand the debugs. To understand The output generated by this debug.We need to understand the Key/fundamental sip messages exchanged during a sip voice call. One popular debug used in troubleshooting a sip solution on a cisco IOS router is One key element of troubleshooting is this: To fix a problem, you need to understand the issue, how it works before you can restore it to order. In as much as I will try to define the under lying layer of the SIP messaging, this document will not go into in-depth analysis of the SIP protocol, so it is advisable to understand SIP protocol technology to be able to understand sip traces. We will look at various logs, the SIP messages, headers, SDP information and try to figure out what is going on in a sip voice call transaction. This document attempts to break down each component of the SIP interaction using a practical approach. Even though these traces are in clear text, these texts can be gibberish unless you understand fully what they mean. SIP traces provide key information in troubleshooting SIP Trunks, SIP endpoints and other SIP related issues.