Междуградски разговор

Въведение

Long-distancecallreferstoacalltoaspecificarea,usuallywithanareacodeorprefixthatisdifferentfromalocalcall.Long-distancecallsgenerallychargeadditionalfees,dependingonthecompanythatprovidestheservice,andareoftenaffectedbyfactorssuchasmarketcompetition.Internationalcallsarecallsconnectedtodifferentcountries,andthechargesaregenerallyhigher.Callchargesareusuallypaidbythedialingparty,unlessthereceivingpartyagreestoacceptacollectcall.

Beforedirectlong-distancecallswerelaunchedonthemarketin1951,alllong-distancecallsrequiredtheassistanceofaspeciallong-distanceoperator,evendirectdialcallsbetweenlocalexchangeoffices.Intercitycallsatthattimewereverytime-consumingandcostly,becauseeachcallhadtobehandledbyoperatorsinmultiplecities.Inaddition,thecalltimeoflong-distancecallsalsoneedstoberecordedmanuallyinordertobecharged.

Вътрешна междуградска фиксирана мрежа

Itreferstothetelephoneserviceprovidedbetweendifferent"long-distancenumber"areas,thatis,betweendifferentlocaltelephonenetworksthroughlong-distancetelephonenetworks(includingISDNnetworks).Auseronalocaltelephonenetworkcancallauseronthelocaltelephonenetworkinanotherlong-distancenumberingareabyaddingthedomesticlong-distanceprefixandlong-distanceareacode.

Fixednetworkdomesticlong-distancetelephoneservicesincludethefollowingmainbusinesstypes:

  • End-to-endtwo-wayvoiceservicesacrosslong-distancenumberingareas.Long-distance call

  • Факс услуги от край до край и услуги за данни със средна и ниска скорост в междуселищни номерационни зони.

  • Varioussupplementaryservicessuchascallforwardingacrosslong-distancenumberingareas,three-waycalling,andcallingnumberdisplay.

  • Theintelligentnetworkserviceacrossthelong-distancenumberingareajointlyprovidedbythelocaltelephonenetwork,long-distancenetworkandintelligentnetwork.

  • Базирана на ISDN услуга за номериране на дълги разстояния.

Theoperatorsoffixed-linedomesticlong-distancetelephoneservicesmustestablishtheirowndomesticlong-distancetelephonenetworkfacilities,andthetypesofdomesticlong-distancetelephoneservicesprovidedcanbepartorallofthem.Thelocaltelephonenetworkandlong-distancetelephonenetworkthroughwhichadomesticlong-distancetelephoneserviceisprovidedcanbethenetworkofthesameoperatororcanbejointlycompletedbythenetworksofdifferentoperators.

Международна междуградска фиксирана мрежа

referstointernationaltelephoneservicesprovidedthroughinternationaltelephonenetworks(includingISDNnetworks)betweencountriesorbetweencountriesandregions.AdomestictelephonenetworkusercandialatelephonenetworkuserinanothercountryorregionbydialingtheIDprefixandcountry(region)code.

Fixednetworkinternationallong-distancetelephoneservicesincludethefollowingmainbusinesstypes:

  • Двупосочни гласови услуги от край до край в различни страни или региони.

  • Факс услуги от край до край и услуги за данни със средна и ниска скорост в различни страни или региони.

  • Cross-countryorregionalintelligentnetworkservicesjointlyprovidedbylocaltelephonenetworks,long-distancenetworks,internationalnetworksandintelligentnetworks,suchasinternationalclosedusergroupvoiceservices.

  • Базирани на ISDN преносни услуги в различни страни или региони.

  • Theinternationalclosedusergroupvoiceserviceprovidedbytheinternationaldedicatedlinebelongstothefixednetworkinternationallong-distancetelephoneservice.

Fixednetworkinternationallong-distancetelephoneserviceoperatorsmustsetuptheirowninternationallong-distancetelephoneservicenetwork,andoperatorswithouttherighttooperateinternationalcommunicationfacilitiesservicesarenotallowedtoconstructinternationaltransmissionfacilities.Internationaltransmissionfacilitiesmustbeleasedfromoperatorswithcorrespondingoperatingrights.Thetypeofinternationallong-distancetelephoneserviceprovidedcanbepartorall.Theprovisionoffixed-lineinternationallong-distancetelephoneservicesmustgothroughaninternationalcommunicationgatewayestablishedwiththeapprovalofthestate.Thelocaltelephonenetwork,thedomesticlong-distancetelephonenetworkandtheinternationalnetworkthroughwhichaninternationallong-distancetelephoneserviceisprovidedcanbethenetworkofthesameoperator,orcanbejointlycompletedbythenetworksofdifferentoperators.

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