ISDN txhais li cas? Integrated Services Digital Network (ISDN) yog cov txheej txheem kev sib txuas lus rau tib lub sijhawm digital kis ntawm lub suab, yees duab, cov ntaub ntawv, thiab lwm yam kev pabcuam hauv lub network hla cov kab ke ib txwm muaj ntawm cov pej xeem hloov xov tooj.
Leej twg tsim ISDN?
ISDN tau qhia los ntawm CCITT (ITU-T) hauv xyoo 1988 thiab muaj nws lub sijhawm kub thaum xyoo 90s, raug xa mus nrog ntau yam kev vam meej hauv lub tebchaws thoob ntiaj teb xws li Nyiv, Australia, India thiab United States.
ISDN siv rau dab tsi?
ISDN lossis Integrated Services Digital Network is a circuit-switched phone network system uas xa ob qho tib si cov ntaub ntawv thiab lub suab hla ib kab digital. Koj tseem tuaj yeem xav tias nws yog cov qauv kev sib txuas lus los xa cov ntaub ntawv, suab, thiab teeb liab. Cov kab digital no tuaj yeem yog kab tooj liab.
D sawv cev rau dab tsi hauv ISDN?
Kev Pabcuam Kev Sib Txuas Digital (ISDN) yog cov txheej txheem kev sib txuas lus rau kev sib txuas xov tooj digital thiab xa suab thiab cov ntaub ntawv hla kab digital.
ISDN hom yog dab tsi?
Types of ISDN Services
- Kev pabcuam nkag lossis 2B + D. Ob 64 Kbps bearer 'B' channels (rau lub suab lossis cov ntaub ntawv) Ib 16 Kbps tswj kev taw qhia 'D' channel.
- tuaj yeem ntsia tau hla cov xov tooj uas twb muaj lawm (yog tias tsawg dua 3.5 mais)
- Yuav tsum muaj BRI kev sib txuas tshwj xeeb kawg.
