Internet Standards/CD2.mdf/ccitt/1992/i/i310.asc

Text File | 1993-06-28 | 4KB | 252 lines

CONTENTS



        Page



1.    SECTION 1 - NETWORK FUNCTIONAL PRINCIPLES.......................    3



1.1    Recommendation I.310 - ISDN network functional principles.......    3



2.    SECTION 2 - REFERENCE MODELS....................................     35



2.1    Recommendation I.320 - ISDN protocol reference model............     35



2.2    Recommendation I.324 - ISDN network architecture................     49



2.3    Recommendation I.325 - Reference configurations for ISDN

    connection types.................................................     64



2.4    Recommendation I.326 - Reference configurations for     relative.network resource requirements..........................      73



3.    SECTION 3 - NUMBERING, ADDRESSING AND ROUTING...................     76



3.1    Recommendation I.330 - ISDN numbering and addressing     principles......................................................     76



3.2    Recommendation I.331 - Numbering plan for the ISDN era..........   85



3.3    Recommendation I.332 - Numbering principles for interworking

    between ISDNs and dedicated networks with different

    numbering plans.................................................   85



3.4    Recommendation I.333 - Terminal selection in ISDN...............     90



3.5    Recommendation I.334 - Principles relating ISDN

    numbers/subaddresses to the OSI reference model network layer     addresses........................................................    112



3.6    Recommendation I.335 - ISDN routing principles..................  118



4.    SECTION 4 - CONNECTION TYPES....................................    145



4.1    Recommendation I.340 - ISDN connection types....................  145



5.    SECTION 5 - PERFORMANCE OBJECTIVES..............................    166



5.1    Recommendation I.350 - General aspects of Quality of Service

    and network performance in digital networks, including     ISDNs...........................................................    166



5.2    Recommendation I.351 - Recommendations in other services

    including network performance objectives that apply at

    T reference point of an ISDN....................................  180



5.3    Recommendation I.352 - Network performance objectives for

    connection processing delays in an ISDN.........................  180





1.    SECTION 1 - NETWORK FUNCTIONAL PRINCIPLES



1.1    Recommendation I.310



ISDN-NETWORK FUNCTIONAL PRINCIPLES































































FIGURE 1/I.310



ISDN network series of Recommendations





1.2    Services supported by an ISDN



    The concepts and the principles of an ISDN are described in RecommendationI.120. The services supported by an ISDN
are given in the

I.200-Series of Recommendations. A classification and the tools for the description of telecommunication services are spec-
ified in Recommendation I.210 according to the description method as given in Recommendation I.130. The network capabil-
ities to support these services are defined in the I.300-Series of Recommendations. The relationship between these
Recommendations and some other relevant I-Series Recommendations is shown in Figure 1/I.310.





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    -    the low-layer functions (LLF) relate to the bearer services;



    -    the high-layer functions (HLF) together with the lower layer functions relate to the teleservices.



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    Recommendation I.324 introduces the functional grouping CRF (Connection Related Functions). The CRF can be local,
national transit or international transit. EFs canbe associated with each of these.





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    -    Basic EFs: For each connection type, there are up to 8 BFGs to implement (see Table 1). Therefore each BFG is
composed of basic EFs related to this connection type. However some basic EFs may be common to several connection
types (e.g. "called number analysis" belonging to the BGF "routing").



    -    Additional EFs: Additional EFs form a common set of functional elements available to build up the various AGFs,
and so to implement supplementary services.



    This grouping of EFs into sets of BGFs and AGFs is illustrated in Figure 6/I.310.





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