Internet Info 1994 March

home *** CD-ROM | disk | FTP | other *** search

/ Internet Info 1994 March / Internet Info CD-ROM (Walnut Creek) (March 1994).iso / standards / CCITT / 1992 / X / x10.asc < prev next >

Wrap

Text File | 1993-07-15 | 21.8 KB | 1,009 lines

Recommendation X.10 CATEGORIES OF ACCESS FOR DATA TERMINAL EQUIPMENT (DTE) TO PUBLIC DATA TRANSMISSION SERVICES (Malaga-Torremolinos, 1984; amended at Melbourne, 1988) The CCITT, considering (a) that Recommendation X.1 defines the international user classes of service in public data networks (PDNs) and ISDN; (b) that Recommendation X.2 defines the international user services and facilities in PDNs; (c) that Recommendation X.3 defines the Packet Assembly/Disassembly facility (PAD) in packet switched public data networks; (d) that Recommendation I.411 defines the reference configurations for access to ISDN services, including Terminal Adaptor (TA) functional grouping; (e) that Recommendations X.30 (I.461), X.31 (I.462) and the I.230 series, define the circuit switched and packet switched data transmission services available from ISDN (including through Terminal Adaptors); (f) the desirability for the users to have defined the various possibilities and requirements for accessing the different public data transmission services, unanimously recommends that categories of access for data terminal equipment (DTE) to the data transmission services provided by PDNs and by ISDNs through Terminal Adaptors should be as defined in this Recommendation. 1 Scope This Recommendation defines the different categories of access for data terminal equipment to the different data transmission services provided by public data networks (PDNs) as defined in Recommendation X.2 and by ISDNs (including through Terminal Adaptors) as defined in Recommendations X.30 (I.461) X.31 (I.462) and the I.230 series, namely: i) circuit switched data transmission services; ii) packet switched data transmission services; iii) leased circuit data transmission services. The categories of access described in this Recommendation take into account direct connections (see Note) to public data networks and ISDNs and the various access cases where interworking with other public networks is involved. Access to the packet switched data transmission service via the PAD function as defined in Recommen-dation X.3 is also covered in this Recommendation. Note - Direct connections may be provided by means of leased circuits or by dedicated access circuits. 2 General Access for data terminal equipment to data transmission services may be achieved by either of the following (see Note): a) by direct connection of the DTE to the public data network or ISDNs; b) or by switched connection of the DTE to a PDN via an intermediate public network of another type (including a PDN, PSTN or ISDN); c) or by switched connection of the DTE to an ISDN (including through a Terminal Adaptor) via an intermediate public network of another type. For example, packet mode terminals may access the public packet switched data transmission service, in user classes of service 8 to 11, either directly or via a switched connection. The switched connection will be established using a circuit switched data network or a public switched telephone network. In both switched cases an interworking function will be required to access the packet switched data transmission service. Note - It is not mandatory for Administrations to provide all the categories of access contained in this Recommendation. 3 Categories of access S 3.1 specifies the categories of access to the data transmission services provided by PDNs for the direct connection case. S 3.2 specifies the categories of access to the data transmission services provided by PDNs for the switched connection case. S 3.3 specifies the categories of access to the data transmission services provided by ISDNs through Terminal Adaptors for the direct connection case. S 3.4 specifies the categories of access to the data transmission services provided by ISDNs through Terminal Adaptors for the switched connection case. Fascicle VIII.2 - Rec. X.10 PAGE1 3.1 Direct connection to data transmission services provided by public data networks TABLE 1/X.10 Start-stop direct connection to a circuit switched data transmission service (see Notes 1 and 2) Category of Data signalling DTE/DCE interface access rate requirements A1 50 to 200 bit/s See Recommendations X.20 and A2 300 bit/s X.20 bis TABLE 2/X.10 Synchronous direct connection to a circuit switched data transmission service (see Note 1) Category of Data signalling DTE/DCE interface access rate requirements B1 600 bit/s B2 2 400 bit/s B3 4 800 bit/s See Recommendations X.21 and X.21 bis B4 9 600 bit/s B5 48 000 bit/s B6 64 000 bit/s PAGE8 Fascicle VIII.2 - Rec. X.10 TABLE 3/X.10 Start-stop direct connection to a packet switched data transmission service (see Notes 1 and 2) Category of Data signalling DTE/DCE interface access rate requirements C1 110 bit/s C2 200 bit/s C3 300 bit/s See Recommendation X.28 C4 200 bit/s C5 75/1 200 bit/s C6 2 400 bit/s TABLE 4/X.10 Synchronous direct connection to a packet switched data transmission service (see Note 1) Category of access Data signalling rate DTE/DCE interface requirements D1 2 400 bit/s D2 4 800 bit/s See Recommendations X.25 and X.31 D3 Fascicle VIII.2 - Rec. X.10 PAGE1 9 600 bit/s (case A) D4 48 000 bit/s (see Note 3) D5 64 000 bit/s TABLE 5/X.10 Start-stop direct connection to a leased circuit data transmission service (see Note 2) Category of Data signalling DTE/DCE interface access rate requirements E1 50 to 200 bit/s See Recommendations X.20 and E2 300 bit/s X.20 bis PAGE8 Fascicle VIII.2 - Rec. X.10 TABLE 6/X.10 Synchronous direct connection to a leased circuit data transmission service Category of Data signalling DTE/DCE interface access rate requirements F1 600 bit/s F2 2 400 bit/s F3 4 800 bit/s See Recommendations X.21 and X.21 bis F4 9 600 bit/s F5 48 000 bit/s 3.2 Switched connection to data transmission services provided by public data networks TABLE 7/X.10 Synchronous switched connection by means of the PSTN to a circuit switched data transmission service For further study. TABLE 8/X.10 Start-stop switched connection by means of a CSPDN to a packet switched data transmission service Category of Data signalling DTE/DCE interface access rate requirements K1 300 bit/s See Recommendation X.28 TABLE 9/X.10 Start-stop switched connection by means of the PSTN to a packet switched data transmission service Category of Data signalling DTE/DCE interface access rate Fascicle VIII.2 - Rec. X.10 PAGE1 requirements L1 110 bit/s L2 200 bit/s L3 300 bit/s See Recommendation X.28 L4 200 bit/s L5 75/1 200 bit/s L6 2 400 bit/s TABLE 10/X.10 Synchronous switched connection by means of a CSPDN to a packet switched data transmission service Category of access Data signalling rate DTE/DCE interface requirements O1 2 400 bit/s O2 4 800 bit/s O3 9 600 bit/s See Recommendation X.32 O4 PAGE8 Fascicle VIII.2 - Rec. X.10 48 000 bit/s O5 64 000 bit/s Fascicle VIII.2 - Rec. X.10 PAGE1 TABLE 11/X.10 Synchronous switched connection by means of the PSTN to a packet switched data transmission service Category of access Data signalling rate DTE/DCE interface requirements P1 1 200 bit/s P2 2 400 bit/s P3 4 800 bit/s See Recommendation X.32 P4 9 600 bit/s TABLE 12/X.10 Synchronous switched access by means of an ISDN B channel to a packet switched data transmission service Category of access Data signalling DTE/DCE interface requirements at rate Reference point S/T Reference point R Q1 2 400 bit/s Q2 4 800 bit/s See Recommendation X.31 Q3 PAGE8 Fascicle VIII.2 - Rec. X.10 9 600 bit/s (case A) See Recommendation X.32 Q4 48 000 bit/s and Recommendation X.32 Q5 64 000 bit/s 3.3 Direct connection to data transmission services provided by ISDNs (including through Terminal Adaptors) Fascicle VIII.2 - Rec. X.10 PAGE1 TABLE 13/X.10 Synchronous direct connection to a circuit switched data transmission service Category of access Data signalling DTE/DCE interface requirements at rate Reference point S/T Reference point R S1 600 bit/s S2 2 400 bit/s S3 4 800 bit/s See Recommendation See Recommendations X.30 X.21 and X.21 bis S4 9 600 bit/s S5 48 000 bit/s S6 64 000 bit/s TABLE 14/X.10 PAGE8 Fascicle VIII.2 - Rec. X.10 Synchronous direct connection via the ISDN B channel to a packet switched data transmission service Category of access Data signalling DTE/DCE interface requirements at rate Reference point S/T Reference point R T1 2 400 bit/s T2 4 800 bit/s See Recommendation See Recommendation X.31 (case B) X.25 T3 9 600 bit/s T4 48 000 bit/s T5 64 000 bit/s TABLE 15/X.10 Synchronous direct connection via the ISDN D channel to a packet switched data transmission service Category of access Data signalling DTE/DCE interface requirements at rate Fascicle VIII.2 - Rec. X.10 PAGE1 Reference point S/T Reference point R U1 2 400 bit/s U2 4 800 bit/s U3 9 600 bit/s U4 . 48 000 bit/s (see See Recommendation See Recommendation Note 4) X.31 X.25 U5 64 000 bit/s (see Note 4) PAGE8 Fascicle VIII.2 - Rec. X.10 3.4 Switched connection to data transmission services provided by ISDNs (including through Terminal Adaptors) TABLE 16/X.10 Start-stop switched connection by means of the PSTN to a packet switched data transmission service For further study. TABLE 17/X.10 Synchronous switched connection by means of a CSPDN to a packet switched data transmission service For further study. TABLE 18/X.10 Synchronous switched connection by means of the PSTN to a packet switched data transmission service For further study. TABLE 19/X.10 Synchronous switched connection by means of an ISDN B channel to a packet switched data transmission service Category of access Data signalling DTE/DCE interface requirements at rate Reference point S/T Reference point R Y1 2 400 bit/s Y2 4 800 bit/s Y3 9 600 bit/s See Recommendation See Recommendation X.31 (case B) X.25 Y4 48 000 bit/s Y5 64 000 bit/s Fascicle VIII.2 - Rec. X.10 PAGE1 Note 1 - Direct connections may be provided by means of leased circuits or by dedicated access circuits. Note 2 - Some Administrations may offer the categories of access of 600 bit/s, 1200 bit/s, 2400 bit/s, 4800 bit/s and 9600 bit/s. Note 3 - Recommendation X.31 (case A) is appropriate at the S/T reference point when category of access D5 is provided by means of ISDN B channel. Note 4 - For 64 kbit/s D channel only. PAGE8 Fascicle VIII.2 - Rec. X.10