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SIP Reference Guide
Table Of Contents
DNS Example
Elements and Architectures
Header Fields
Header Fields – Compact Forms
Header Parameters & Values
INVITE Client Transaction
INVITE Server Transaction
INVITE/200
Mapping Between SS7 USI and the SIP SDP (SS7 Origination)
Mapping Between the SIP SDP and SS7 USI/HLC (SIP Origination)
Mapping ISUP Cause Codes to SIP-I/SIP-T Responses
Mapping SIP-T Responses to ISUP Cause Codes
Mechanics: Location
Mechanics: Registration
Namespaces and Priority Values for the Resource Priority Header Field
NAPTR Records
Non-INVITE Client Transaction
Non-INVITE Server Transaction
Option Tags for SIP Extensions
Response Code
Security Mechanism Names
Session Description Protocol
SIP Events
SIP Methods
SIP Response to a Call Progress (CPG) Message
SIP Timers
SIP/SIPS URI Parameters
SIP-I Responses - ISUP Cause Codes
SIPS's Use of DNS
SRV Records
Types of DNS Resource Records
URI Purposes
Warning Codes
Glossary of SIP Acronyms
SIP References
INVITE/200
Other SIP Resources
SIP Pocket Guide
SIP Signaling Router Use Cases Multimedia
SIP Sessions Blog
SIP Signaling Router Application Handbook
SIP Signaling Router (SSR) Use Cases Application Guide
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ACK/200 is an end-to-end message - it tells the other endpoint that its 2xx-class response has been received
The messages at Phil's UA are exactly the form as if it had talked directly to Robert's UA
Proxies can ask to see the ACK/200
The messages at Phil's UA are STILL exactly the form as if it had talked directly to Robert's UA
