ISO IEC 21992 pdf download Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Mapping functions for the tunnelling of QSIG through IP networks
This International Standard specifies functions for using a packet network that uses the Internet Protocol (IP)as its network layer protocol and UDP and TCP as its transport layer protocols, to interconnect two PrivateIntegrated services Network eXchanges (PINXs ) forming part of a Private Integrated Services Network (PISN).Interconnection is achieved by carrying the inter-PINX signalling protocol directly over the TransmissionControl Protocol (TCP) and inter-PlNX user information (e.g., voice) over the Real-time Transport Protocol(RTP),RTP being carried over the User Datagram Protocol (UDP).The inter-PINX signalling protocol isassumed to be QSIG, as specified in lSO/IEC 11572,ISO/IEC 11582 and other International Standards.
This lnternational Standard provides for two types of interconnection:
on-demand，where a separate TCP connection for QSIG is established at the start of each call andcleared down at the end of that call; and
semi-permanent,where a single TCP connection with an indefinite lifetime carries QslG on behalf ofmany single calls.
This International Standard is applicable to PINXs that can be interconnected to form a PISN using asIG asthe inter-PINX signalling protocol.
ln order to conform to this International Standard，a PINX shall satisfy the requirements identified in thelmplementation Conformance Statement (ICS) proforma in Annex A.
The following referenced documents are indispensable for the application of this document.For datedreferences,only the edition cited applies. For undated references,the latest edition of the referenceddocument (including any amendments) applies.
ISO/IEC 11572:2000，Information technology -Telecommunications and information exchange betweensystems — Private Integrated Services Network — Circuit mode bearer services — Inter-exchange signallingprocedures and protocol
ISOIEC11574:2000，Information technology —Telecommunications and information exchange betweensystems — Private Integrated Services Network -Circuit-mode 64 kbit/s bearer services – Servicedescription,functional capabilities and information flows
ISO/IEC 11579-1:1994,Information technology —Telecommunications and information exchange betweensystems —Private integrated services network — Part 1:Reference configuration for PISN Exchanges (PINX)
ISO/IEC 11582:2002,Information technology—Telecommunications and information exchange betweensystems – Private Integrated Services Network – Generic functional protocol for the support ofsupplementary services —Inter-exchange signalling procedures and protocol
ITU-T Rec. I.112:1993, Vocabulary of terms for ISDNs
ITU-T Rec. I.210:1993, Principles of telecommunication services supported by an ISDN and the means to
IETF RFC 760, Internet Protocol
IETF RFC 761, Transmission Control Protocol
IETF RFC 768, User Datagram Protocol
IETF RFC 1889, RTP: A Transport Protocol for Real-Time Applications
IETF RFC 2126, ISO Transport Service on top of TCP (ITOT)
4 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
4.1 External definitions
This International Standard uses the following terms defined in other documents:
IVN (ISO/IEC 11579-1)
PINX (ISO/IEC 11579-1)
PISN (ISO/IEC 11579-1)
Service (ITU-T Rec. I.112)
Signalling (ITU-T Rec. I.112)
4.2 Other definitions
In the context of a call or call-independent signalling connection across an IPL, the PINX that transmits the QSIG SETUP message.