ISO IEC 18017 pdf download – Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Mapping functions for the employment of Virtual Private Network scenarios

ISO IEC 18017 pdf download – Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Mapping functions for the employment of Virtual Private Network scenarios
1.Scope
This International Standard defines the mapping functions in exchanges of private integrated services networks (PISN)required for their attachment to Virtual Private Network (VPN) functionality of public (or third party provided) networkequipment.
Mapping functions are required to provide for the physical termination of the interface at the C or T reference points, and forthe mapping of user channels and signalling information flows at the Q reference point to the appropriate channels or time-slots at the C or T reference point.
At the T reference, point it is assumed that the protocol used on the D channel is the enhanced version of DSS1. These protocolenhancements are given in Annex Q and Annex X of Recommendations Q.931 and 0.932 respectively.
The mapping function specified in this International Standard are applicable to PINXs connected to a VPN that supports citherPISN information flows between accesses and/or PISN services.
The C and Qreference points are defined in ISOIEC 11579-1. The T reference point is defined in ITU-TRec.1.411.
The types of interfaces at the C or T reference point covered by this lnternational Standard are the ISDN primary rate interfaceand the basic access interface.
2.Conformance
ln order to conform to this International Standard, a PINX shall satisfy the requirements identified in the ImplementationConformance Statement (ICS) proforma in Annex A.
3. Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of thisInternational Standard.For dated references,subsequent amendments to, or revisions of, any of these publications do notapply.However,parties to agreements based on this International Standard are encouraged to investigate the possibility ofapplying the most recent editions of the normative documents indicated below.For undated references, the latest edition of thenormative document referred to applies. Members of lSO and IEC maintain registers of currently valid International Standards.ISOIECTR 14475:2001, lnformation technology -Telecommunications and information exchange between systems – PrivateIntegrated Services Network – Architecture and scenarios for Private Integrated Services Networking
ETS 300 415:1994, Private Telecommunication Network (PTN); Terms and definitions
ITU-T Rec. Q.920:1993, Digital Subscriber Signalling System No. 1 (DSS1) – ISDN user-network interface data link layer -General aspects
ITU-T Rec. Q.920,Amend 1: 2000,Amendment 1 to ITU-T Recommendation o.920ITU-T Rec.Q.921:1997,ISDN user-network interface – Data link layer specification
ITU-T Rec. Q.921, Amend 1: 2000, Amendment 1 to ITU-T Recommendation Q.921
ITU-T Rec. Q.931:1998, ISDN user-network interface layer 3 specification for basic call control
ITU-T Rec. Q.932,1998, Digital subscriber signalling system No. 1 – Generic procedures for the control of ISDN supplementary services
4. Terms and definitions
For the purpose of this International Standard the terms and definitions given in ETS 300 415 and the following apply.
4.1 α α reference point: boundary between the Inter-Connecting Network (ICN) and the public ISDN.
NOTE – The ICN at this point provides gateway functions such as numbering, charging, management and routing.
4.2 channel: means of bi-directional transmission of user or signalling information between two points.
4.2.1 D Q -Channel: channel used to convey call control information between the Q reference points of two peer PINXs.
4.2.2 U Q -Channel: channel used to convey user information between the Q reference points of two peer PINXs.
4.3 Interconnecting Network (ICN): emulation of transit-PINX functionality by equipment that is physically part of the public network, includes one or more IVNs and may include the emulation of gateway-PTNX functionality.
4.4 inter-PINX connection: connection provided by an intervening network (IVN) between two C reference points used to transport inter-PINX information from the PISN control plane and/or the PISN user plane.
4.5 inter-PINX link: link between the Q reference points of two PINXs, comprising the totality of signalling transfer and user information transfer means.
4.6 T+ reference point: reference point between an Attached PINX and the ICN.
NOTE – The interface at the T+ reference point supports private network calls (PISN) and it may also support public ISDN calls.
4.7 public network equipment: equipment of a public network provider, which is used to provide public network (ISDN) services and virtual private network (VPN) services.
NOTE – The term is also used as a synonym to designate equipment of any other third party which is used to provide virtual private network (VPN) services only, and which may or may not provide access functions to a public network.
4.8 third party: generic term designating a (legal) body providing VPN services either in conjunction with or without public network services.
NOTE – In the first case the third party is also known as a public network provider.
4.9 Virtual Private Network (VPN): private network transmission and switching functionality emulated by third party provided equipment.
NOTE – The functionality provided by a VPN includes transit-PINX functionality and/or end-PINX functionality (i.e. it serves the originating or destination user).
4.10 VPN-PINX: that part of a third party provided switched network that provides transit-PINX functionality and/or endPINX functionality.
4.11 attached PINX: PINX attaching to the VPN. In the context of a call, the attached PINX can be an end-PINX (i.e.serving the originating or destination user or acting as a gateway with another network) or it can be a transit- PINX.
5. List of acronyms
CSIG C reference point SIGnalling information flows
DLCI Data Link Connection Identifier