ECMA 355 : 3ED 2008

1 Scope
2 Normative references
3 Terms and definitions
  3.1 External definitions
  3.2 Other definitions
      3.2.1 Corporate telecommunication Network (CN)
      3.2.2 Egress gateway
      3.2.3 Gateway
      3.2.4 Ingress gateway
      3.2.5 IP network
      3.2.6 Media stream
      3.2.7 Private Integrated Services Network (PISN)
      3.2.8 Private Integrated services Network eXchange (PINX)
4 Abbreviations and acronyms
5 Background and architecture
  5.1 Architecture
  5.2 Basic operation
  5.3 QSIG connectionless transport
  5.4 Late availability of SDP parameters at the egress
      gateway
6 Procedures
  6.1 General
  6.2 Encapsulation of QSIG messages in SIP messages
  6.3 QSIG SETUP message handling at an ingress gateway
      6.3.1 Sending a SIP INVITE request
      6.3.2 Receipt of responses to the INVITE request
  6.4 QSIG SETUP message handling at an egress gateway
      6.4.1 Receiving a SIP INVITE request
      6.4.2 Rejecting a QSIG message in an INVITE request
  6.5 Subsequent QSIG messages
  6.6 Terminating the SIP dialog
  6.7 QSIG connectionless message handling at an ingress
      gateway
      6.7.1 Sending a SIP INVITE request
      6.7.2 Receipt of responses to the INVITE request
  6.8 QSIG connectionless message handling at an egress
      gateway
7 Example message sequences
  7.1 Call establishment
  7.2 Call clearing
  7.3 QSIG connectionless message
  7.4 Call establishment with port=0 in first SDP answer
  7.5 Backwards compatibility with early editions
8 Security considerations
Annex A Changes from early editions (informative)

Specifies tunnelling of "QSIG" over the Session Initiation Protocol (SIP) within a corporate telecommunication network (CN).