ITU-T G.108.1 (03 2004) (英) Guidance for assessing conversational……

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1、INTERNATIONALTELECOMMUNICATIONUNIONITU-TG.108.1TELECOMMUNICATION(05/2000)STANDARDIZATIONSECTOROFITUSERIESG:TRANSMISSIONSYSTEMSANDMEDIA,DIGITALSYSTEMSANDNETWORKSInternationaltelephoneconnectionsandcircuits–GeneraldefinitionsGuidanceforassessingconversationalspeechtransm

2、issionqualityeffectsnotcoveredbytheE-modelITU-TRecommendationG.108.1(FormerlyCCITTRecommendation)ITU-TG-SERIESRECOMMENDATIONSTRANSMISSIONSYSTEMSANDMEDIA,DIGITALSYSTEMSANDNETWORKSINTERNATIONALTELEPHONECONNECTIONSANDCIRCUITSG.100–G.199GeneraldefinitionsG.100–G.109General

3、RecommendationsonthetransmissionqualityforanentireinternationaltelephoneG.110–G.119connectionGeneralcharacteristicsofnationalsystemsformingpartofinternationalconnectionsG.120–G.129Generalcharacteristicsofthe4-wirechainformedbytheinternationalcircuitsandnationalG.130–G.

4、139extensioncircuitsGeneralcharacteristicsofthe4-wirechainofinternationalcircuits;internationaltransitG.140–G.149GeneralcharacteristicsofinternationaltelephonecircuitsandnationalextensioncircuitsG.150–G.159Apparatusassociatedwithlong-distancetelephonecircuitsG.160–G.16

5、9TransmissionplanaspectsofspecialcircuitsandconnectionsusingtheinternationaltelephoneG.170–G.179connectionnetworkProtectionandrestorationoftransmissionsystemsG.180–G.189SoftwaretoolsfortransmissionsystemsG.190–G.199INTERNATIONALANALOGUECARRIERSYSTEMGENERALCHARACTERISTI

6、CSCOMMONTOALLANALOGUECARRIER-G.200–G.299TRANSMISSIONSYSTEMSINDIVIDUALCHARACTERISTICSOFINTERNATIONALCARRIERTELEPHONEG.300–G.399SYSTEMSONMETALLICLINESGENERALCHARACTERISTICSOFINTERNATIONALCARRIERTELEPHONEG.400–G.449SYSTEMSONRADIO-RELAYORSATELLITELINKSANDINTERCONNECTIONWIT

7、HMETALLICLINESCOORDINATIONOFRADIOTELEPHONYANDLINETELEPHONYG.450–G.499DIGITALTRANSMISSIONSYSTEMSTERMINALEQUIPMENTSG.700–G.799DIGITALNETWORKSG.800–G.899DIGITALSECTIONSANDDIGITALLINESYSTEMG.900–G.999Forfurtherdetails,pleaserefertothelistofITU-TRecommendations.ITU-TRecomme

8、ndationG.108.1GuidanceforassessingconversationalspeechtransmissionqualityeffectsnotcoveredbytheE-modelSummaryThisITU-