ITU-T G.766 (11 1996) (英) Facsimile demodulation remodulation……

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1、INTERNATIONALTELECOMMUNICATIONUNION)45 4'TELECOMMUNICATION(11/96)STANDARDIZATIONSECTOROFITUSERIESG:TRANSMISSIONSYSTEMSANDMEDIADigitaltransmissionsystems–Terminalequipments–Principalcharacteristicsoftranscoderanddigitalmultiplicationequipment&ACSIMILEDEMODULATIONR

2、EMODULATIONFORDIGITALCIRCUITMULTIPLICATIONEQUIPMENTITU-TRecommendationG.766(PreviouslyCCITTRecommendation)ITU-TG-SERIESRECOMMENDATIONS42!.3-)33)/.3934%-3!.$-%$)!INTERNATIONALTELEPHONECONNECTIONSANDCIRCUITSG.100–G.199).4%2.!4)/.!,!.!,/'5%#!22)%23934%-GENERALCH

3、ARACTERISTICSCOMMONTOALLANALOGUECARRIER-G.200–G.299TRANSMISSIONSYSTEMSINDIVIDUALCHARACTERISTICSOFINTERNATIONALCARRIERTELEPHONEG.300–G.399SYSTEMSONMETALLICLINESGENERALCHARACTERISTICSOFINTERNATIONALCARRIERTELEPHONEG.400–G.449SYSTEMSONRADIO-RELAYORSATELLITELINKSANDINTERCO

4、NNECTIONWITHMETALLICLINESCOORDINATIONOFRADIOTELEPHONYANDLINETELEPHONYG.450–G.49942!.3-)33)/.-%$)!#(!2!#4%2)34)#3$)')4!,42!.3-)33)/.3934%-3TERMINALEQUIPMENTSG.700–G.799GeneralG.700–G.709CodingofanaloguesignalsbypulsecodemodulationG.710–G.719Codingofanaloguesignalsby

5、methodsotherthanPCMG.720–G.729PrincipalcharacteristicsofprimarymultiplexequipmentG.730–G.739PrincipalcharacteristicsofsecondordermultiplexequipmentG.740–G.749PrincipalcharacteristicsofhigherordermultiplexequipmentG.750–G.7590RINCIPALCHARACTERISTICSOFTRANSCODERANDD

6、IGITALMULTIPLICATIONEQUIPMENT''Operations,administrationandmaintenancefeaturesoftransmissionequipmentG.770–G.779PrincipalcharacteristicsofmultiplexingequipmentforthesynchronousdigitalG.780–G.789hierarchyOtherterminalequipmentG.790–G.799DIGITALNETWORKSG.800–G.

7、899GeneralaspectsG.800–G.809DesignobjectivesfordigitalnetworksG.810–G.819QualityandavailabilitytargetsG.820–G.829NetworkcapabilitiesandfunctionsG.830–G.839SDHnetworkcharacteristicsG.840–G.899DIGITALSECTIONSANDDIGITALLINESYSTEMG.900–G.999GeneralG.900–G.909Parametersforo

8、pticalfibrecablesystemsG.910–G.919Digitalsectionsathierarchicalbitratesbasedonabitrateof2048kbit/sG.920–G.929Digitall