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1 - OERIEW OF DIGITAL SBSCRIBER LINE (DSL RECOMMENDATIONS THE TELECOMMNICATION TECHNOLOGY COMMITTEE

2

3 (DSL JTG995.

4 IT-T TTC G JT-G992.1( G JT-G992.2( G JT-G994.1( G JT-G996.1( IT-T G.991.1( G.992.1, G.992.2, G.997.1( G Annex H G.991.2,G.994.1, G.996.1( JTG995.

5 DSL xdsl IT-T G.991.1G.992.1G.992.2G.994.1G G B1Q ADSL ATM AT AT-C AT-R C CAP CO CPE DLL DSL 2 Binary 1 Quaternary Asymmetric Digital Subscriber Line( Asynchronous Transfer Mode ( ADSL Transceiver nit(adsl ADSL Transceiver nit-central Office End ( ADSL ADSL Transceiver nit-remote End ( ADSL Common circuitry ( Carrier-less Amplitude and Phase ( Central Office ( Customer Premises Equipment ( Digital Local Line ( Digital Subscriber Line ( 4 JTG995.

6 GII H HDSL h-p HSS-TC HST HST-C HST-R I ISDN ISP l-p LT M MPS-TC NT2 NT PHY PMD PMS-TC POTS REG SM SNI STM TA TC TCM TPS-TC XT XT-C XT-R Global Information Infrastructure HDSL transceiver (HDSL High-speed Digital Subscriber Line ( high-pass ( Hand Shake Specific-Transmission Convergence ( Handshake Transceiver nit ( Handshake Transceiver nit-central office end ( Handshake Transceiver nit-remote end ( Interface ( Integrated Services Digital ( Internet Service Provider Low-pass ( Line Termination nit ( Mapping ( Management Protocol Specific-Transmission Convergence ( Termination 1 ( 1 Termination 2 ( 2 Termination nit ( Physical Layer ( Physical Media Dependant Physical Media Specific-Transmission Convergence ( Plain Old Telephony Service ( Regenerator ( Service Module ( Service Node Interface ( Synchronous Transfer Mode ( Terminal adapter ( Transmission Convergence ( Time Compressed Multiplex ( Transport Protocol Specific-Transmission Convergence ( Access Interface ( xdsl Transceiver nit (xdsl xdsl Transceiver nit-central Office End ( xdsl xdsl Transceiver nit-remote End ( xdsl DSL G.992.1G.992.2G.991.1G.991.2G.996.1G G G.991.1G.991.2G G G.994.1G G G G JTG995.

7 DSL 5.8 G (ADSL G (AT-R (AT-CADSL 2 1 AT-R AT-C ADSL ( G ADSL ADSL G Mbit/s 640kbit/s 2 I G I II II G ADSL - (POTS ADSL - G.961 I II ISDN ADSL ADSL ISDN ISDN - (POTS G.961 III ISDN ADSL - ( ( G AT-C AT-R - AT-C AT-R AT-R - ATM - 6 JTG995.

8 - G.961 I II ISDN - G.961 III ISDN - IT-T G.961 TCM-ISDN SSDSL TCM-ISDN 32kbit/s 192kbit/s 1.6Mbit/s 1.544Mbit/s STM G AT-C AT-R STM (ATM - G G G G G G AT-C AT-R ADSL ( 2 G G ADSL G Mbit/s 512kbit/s G AT-C AT-R - AT-C AT-R AT-R - ATM 7 JTG995.

9 - - CPE CO - AT-R - ; - G.961 III TCMISDN - G.961 I II ISDN G G G G (HDSL HDSL HDSL kbit/s kbit/s kbit/s 1 G B1Q CAP G kbit/s 2B1Q A kbit/s G.704 CAP B G HDSL HDSL HDSL G G HDSL 8 JTG995.

10 G DSL G a b DSL c DSL d DSL e f G G.992.x eoc ADSL G G.99x G G G G G JTG995.

11 DSL G.992.1G.992.2G G G G G G G G G G G kbit/s kbit/s kbit/s G kbit/s G Mbit/s 640kbit/s G Mbit/s 512kbit/s G G G G G G.991.2,G G G G G G.991.1G G G G G G G G G G G G DMT G B1Q CAP G G DMT G G G G G G G IFFT FEC G G.961 III TCM-ISDN G G TCM-ISDN C TCM-ISDN G H G H G C TCM-ISDN DMT G C G H G G T1 E1 10 JTG995.

12 2 POTS ISDN G kbit/s G kbit/s G G G TC-PAM G B1Q CAP G.992.x 1 DSL G G.992.x DSL G G G G G G DSL G G G G G G.99x G G G G G.990 G G G.992.x eoc ADSL G G G eoc G.992.x ( G G.99x 2 1 I.410 N-ISDN 6.1 G.99x I.411 N-ISDN xdsl Access Management Core SNI Q Access 1 T NT2 S TA G.99x R ser Terminal T ( JTG995.

13 ( 4 2(NT2 5 (TA 6 7 Q ( Q ( T ( T ( ATM T/ NT2 T S NT2 ( ATM NT2 /2 NT NT NT TA G.99x 2 ( ( ( 1 DSL ( G JTG995.

14 Core SNI Access T NT2 S W TA R ser Terminal Broadband network P H Y -C AT-C NT AT-R T-R P H Y T/S Customer Premise network SM Narrow-band network GSTN or ISDN -C 2 h p l p Splitter C -C -R h p l p Splitter R -R 2 POTS or ISDN service SM Telephone set voiceband modem, or ISDN terminal T ( Signal lines Interfaces 2 G G ADSL 1 ( 2 ADSL : 1 ADSL (AT-C 2 POTS ADSL POTS 3 ADSL 1 ADSL (AT-R 2 / 3 4 ADSL-NT2 G T ( -C-R-CT-R -C -R G R -C -C T-R -C (STM ATM 13 JTG995.

15 -C T-R ( AT-C AT-R -C2 -R2 -C -R ( SONET/SDH -C T/S G T-R T/S ADSL-NT( NT2 3 1 G Core SNI Access T NT2 S TA R ser Terminal Broadband network P H Y -C AT-C NT T-R AT-R P H Y T/S Home network SM -C 2 h p SM Narrow-band network GSTN or ISDN h p l p Splitter C -C -R Home POTS wiring -R l p (optional Telephone set voiceband modem, or ISDN terminal T ( Signal lines Interfaces G G G POTS POTS POTSISDN G G R2 G G JTG995.

16 ser Terminal R S T Access TA NT2 SNI Core HDSL Core Access Digital Section Application Interface Customer side I M C H DLL REG DLL H C M I Application Interface NT ( Termination nit NOTE 1 LT (Line Termination nit T ( C H I M REG DLL = =HDSL = = = = 1 HDSL G HREG DLL 2: REG 4 G HDSL 4 HDSL (H HDSL (DLL kbit/s2 1168kbit/s kbit/s HDSL ( (C HDSL HDSL HDSL (REG HDSL (I (M (LT ( (NT ( HDSL HDSL 15 JTG995.

17 5 1 G S R T ser Terminal TA NT2 Access Core SNI ser Terminal T/S -R -C -R -C -R -C DLL DLL DLL ST-R SR ST-C CO ser Terminal T/S (Optional T ( (Optional 5 G G SHDSL DLL SHDSL SR ST-C ST-R ST-C 1 SHDSL SR ST SR DLL ST- SR -R -C ST-C ST-R NT2 ST-R 1 T/S 6 1 G JTG995.

18 Core SNI Access T NT2 S TA R ser Terminal HST-C HST-R T/S ser Terminal CO Line Circuit -C2 -C -R -R2 Splitter Loop Plant Splitter POTS Set G T ( G G.992.1/G G G ( (HSTG G G HST-C HST-R NT2TA HST-R 7 1 G JTG995.

19 Access Management Q Core SNI Access T NT2 S TA R ser Terminal Q AN Management Entity NT Management Entity TE Broadband P H Y XT-C Loop Plant XT-R P H Y Home TE -C -C -R T-R T/S Management Interface in G.ploam T ( G G G G G xdsl (XTG G G (AN NT Q AN NT XT-R NT2TA 8 1 G JTG995.

20 Core SNI Access T NT2 S TA R ser Terminal XT-C XT-R CO Line Circuit -C2 -C -R Home POTS Wiring -R2 Splitter Test Loop Splitter G POTS Set T ( G G G XT G.992.1G G.99x POTS 2 ( G XT-CPOTS POTS POTS XT-R G.99x 9 DSL 19 JTG995.

21 , NT2/1 AT-R AT-C LT Transport Protocol (e.g. ATM TPS-TC TPS-TC PMS-TC PMS-TC PMD PMD Prem. Wiring γ-r γ-c β α Physical Transmission Media Transport Protocol (e.g. ATM TPS-TC PMS-TC Private PMD Internal Interface S/T LT Internal Interface T ( : TPS-TC PMS-TC LT R C ( ATM xdsl ( ADSL T-R-C ( AT-C AT-R PMDTPS-TC PMS-TC OSI 3 (LT AT-C NT2/1 AT-R T/S / LT T / NT2 S / 10 G G JTG995.

22 , NT2/1 AT-R AT-C LT Transport Protocol (e.g. ATM γ-r γ-c Transport Protocol (e.g. ATM TPS-TC TPS-TC β α TPS-TC PMS-TC PMD PMD PMD Private Premises Wiring Physical Transmission Media Internal Interface S/T LT Internal Interface T ( G G G G PMD PMS-TC 2 1 PMD PMD G G G.991.1, NT2/1 AT-R AT-C LT Transport Protocol (e.g. ATM γ-r γ-c Transport Protocol (e.g. ATM TPS-TC PMS-TC PMD PMD1 TPS-TC PMD2 β α PMD1 TPS-TC PMD2 Private Prem. Wiring Physical Transmission Media Internal Interface S/T LT Internal Interface T ( G PMD G JTG995.

23 , NT2/1 ST-R ST-C LT Transport Protocol (e.g. SDH Not Specified ser Data Interface TPS-TC PMS-TC PMD γ R γ C β α Physical Transmission Media TPS-TC PMS-TC PMD Transport Protocol (e.g. SDH Not Specified Internal Interface S/T LT Internal Interface T ( G G PMD PMS-TC PMS-TC ST-C ST-R TPS-TC TPS-TC SHDSL TPS-TC r c TPS-TC r c G JTG995.

24 AT-R AT-C HSS-TC PMD Physical Transmission Media HSS-TC PMD T ( G G G G G PMD (HSS-TCG G G G G.992.1G G G.99x G.997.1, NT2/1 AT-R AT-C LT Management Protocol (s Management Protocol (s MPS-TC TPS-TC TPS-TC MPS-TC Private PMS-TC PMS-TC Private PMD PMD Prem. Wiring Physical Transmission Media Internal Interface S/T LT Internal Interface T ( G.99x 14 MPS-TC 4 PMD PMS-TC( AOCEOC 23 JTG995.

25 (MPS-TC( SNMP TPS-TC( ATM G ISDN RST CPE ISP CPE-CPE GII 2 NT2 15 G.902 GII G G (Access Section - Management Q N-ISDN Reference Points R S T T Terminal Equipment TA NT2 Access Core Access ISP SNI ISP SNI T ( G.902 GII Reference Points xdsl 24 JTG995.

26 T 16 T T TE Access Core Access ISP SNI ISP SNI T ( T G ISDN T TE NT2 TA 17 G JTG995.

27 Q Access Node TE Service Splitter Copper Plant Service Splitter LT Phone T -R -C PSTN T ( T G G Q Phone Optional Low pass Filter Access Node TE Copper Plant Service Splitter LT Phone T -R -C PSTN T ( T G T TE Access Core Access ISP SNI SNI ISP T ( JTG995.

28 G TE (GII TE T TE NT2 ( TA 20 G Q Access Node TE Service Splitter Copper Plant Service Splitter LT Phone -R -C PSTN G T ( G TE (GII TE T TE B-NT2 ( TA 21 G Q Phone Access Node S TE Copper Plant Service Splitter LT Phone -R -C PSTN T ( G JTG995.

29 DSL : β γ-c γ-r ( / ( / XDSL ( ADSLT-R-C XDSL ( ADSLT-R-C ADSL Crceocaoc OAM FEC ADSL AS0 OAM crceoc FEC AT-C AT-R ADSL I II DMT (IDFT 1 {ZI} DMT {xn}(idft {ZI} (=4 kbaud AT-C AT-R DSL IT-T G.991.1G.992.1G.992.2G.994.1G.996.1G Sum(Bf>0 Sum(Bi>0 FEC OAM G G JTG995.

30 LS0 DSL AT-R AT-C G AT-C AT-R ( 1 1 Sum(Bf>0 Sum(Bi>0. SNI (SNI (ADSL ( POTS POTS IDFT Zi 68 1 ((69/68*4.0=4.0588kbaud AOCeoc IB DMT FEC G [ACK](1 (NAK AT-R AT-C 04kHz kHz POTS POTS xdsl 29 JTG995.

31 1 G G.961 ISDN (2B+D144kbps G (HDSL 4 G (SHDSL 5 G (ADSL G (ADSL G (DSL G (DSL G (DSL I.411 ISDN JTG995.

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