I- Network Switch Phone Network (PSTN) yiqoqo lehlabathi leenkcukacha ezixubileyo ekusetyenzisweni ukuxhasa uxhulumaniso lwezwi olujikelezayo. I-PSTN inikeza iNkonzo yeeNdawo zeNgcaciso zeNgcaciso zeNgcaciso (i-POTS) yeeNdawo zeNgcaciso zeNgcaciso (i-POTS) - eyaziwa ngokuba yinkonzo yefowuni yomhlaba . Iingxenye ze-PSTN nazo zisetyenziselwa iinkonzo zokuxhumeka kwi-intanethi kubandakanya i- Digital Subscriber Line (DSL) kunye ne- Voice Over Internet Protocol (VoIP) .
I-PSTN yenye yezobuchwepheshe bokusekwa kwee- telephony - i-electronic voice communications. Nangona iifom zangaphambili ze-telephony eziquka i-PSTN zonke zixhomekeke ekubonakalisweni kwe-analog, ubuchwepheshe be-telephony banamhlanje basebenzisa ukubonakaliswa kweedigrikhi, sebenzisa idatha yedijithali, kunye nokuxhasa uxhumano lwe-intanethi. Ukugqithiswa kwe-intanethi ye-intanethi kuvumela zombini ilizwi kunye nedatha ukwabelana ngamanethiwekhi afanayo, uguquko lokuba imboni yehlabathi yonxibelelwano ihambela phambili (ngenxa yezizathu zemali). Umngeni obalulekileyo kwi-intanethi ye-intanethi kukufezekisa ukuxhomekeka okuphezulu kakhulu kunye namanqanaba omgangatho ukuba iinkqubo zenkcubeko zendabuko zifezekiswe.
Imbali yePSTN Technology
Unxibelelwano lweefonti zandisiwe emhlabeni jikelele ngee-1900 njengoko iifowuni zaziqhelanisa ngokuqhelekileyo emakhaya. Amanethiwekhi omnxeba asebekhulile asetshenziselwa ukubonakaliswa kwe-analog kodwa aphuculwe ngokukhawuleza ukusebenzisa iziseko zedijithali. Uninzi lwabantu ludibanisa i-PSTN kunye necandelo lobhedu olufumaneka kumakhaya amaninzi nangona isiseko se-PSTN esetyenziswayo namhlanje sisebenzisa i- fiber optic cables kwaye ishiya ubhedu kuphela ngokuba okuthiwa "i-mile yokugqibela" yocingo phakathi kwekhaya kunye nesevisi yokunxibelelana kwee-telecommunication iququzelele.I-PSTN isebenzisa i- SS7 mqondiso we protocol.
Iifowuni ze-PSTN zixutywe kwiingxube zodonga ezifakwe kumakhaya zisebenzisa iicingo zomnxeba kunye neeRJ11. Iindawo zokuhlala azihlali zineenkcukacha kwiindawo zonke ezifanelekileyo, kodwa abanini bezindlu bangafaka zabo iifowuni zeefowuni ngolwazi olusisiseko ngombane wombane.
Ikhonkco enye ye-PSTN isekela iikhilobithi ezingama-64 ngeyesibini (Kbps) zebhanwidth yedatha. Umgca wefowuni ye-PSTN ungasetyenziswa kunye neemodem zenethiwekhi zokudibanisa ezemveli zokuxhuma ikhompyutha kwi-intanethi. Kwiintsuku zokuqala zeWebhu yeWebhu yeWebhu (WWW) , le nto yayiyindlela yokuqala yokufikelela kwi-Intanethi kodwa yayingagqibekanga ngeenkonzo ze-Intanethi. Ukunxibelelana kwe-intanethi ye-intanethi kuxhaswe kwi-56 Kbps.
PSTN kunye ne-ISDN
I-Network Integrated Network Network (ISDN) yaphuhliswa njengenye indlela eya kwi-PSTN enika iinkonzo zombini kunye nenkxaso yedatha yedijithali. I-ISDN yafumana ukuthandwa kwamashishini amakhulu ngenxa yokukwazi kwayo ukuxhasa amaninzi amfowuni kunye neendleko zokufakela ezantsi. Kwakhona kunikwa abathengi njengenye indlela yokufikelela kwi-intanethi exhasa i-128 Kbps.
PSTN vs VoIP
I-Voice phezu kwe-Intanethi ye-Intanethi (i-VoIP) , ngamanye amaxesha iphinda ibizwa ngokuba yi- IP telephony , yenzelwe ukutshintsha iinkonzo zeefowuni ezitshintshileyo zombini ze-PSTN kunye ne-ISDN kunye nenkqubo yokuguqula ipakethi ngokusekelwe kwi- Intanethi ye-Intanethi (IP) . Izizukulwana zokuqala zeenkonzo zeVoIP zithinteka ngokuthembeka kunye nemigangatho esemgangathweni yezinga eliphezulu kodwa zancincike ngokukhawuleza ngokuhamba kwesikhathi.