SIP Headers – Compact Form

SIP Headers – Compact Form

Many common SIP header fields have a compact form where the header field name is denoted by a single lower case character. Some examples are given below −

HeaderCompact Form
ToT
ViaV
Call-IDI
ContactM
FromF
SubjectS
Content-LengthI

Here is the list of meaning of all the header fields.

SIP – Headers

asterisk: sip remove header

SIP : Session Initiation Protocol

Basic Call Flow – SIP