Izinsiza zesimanje zisebenza ngejubane lapho isimemezelo esisodwa esingekho singaphazamisa ukusebenza, silibazise amaqembu, noma sicindezele ukuphepha. Izinhlelo ze-IP paging sezibe ngumgogodla wezokuxhumana ezinkampanini, zithatha indawo yama-intercom akudala angasebenzi kahle kanye namanethiwekhi e-PA angalawuleki. Enkabeni yalolu shintsho kukhona i-SIP speaker, i-audio endpoint eyakhelwe kunethiwekhi exhuma ngqo kwingqalasizinda yakho yedatha ekhona. Ngokungafani namadivayisi avamile okumemezela, i-SIP speaker ixhumana ngenethiwekhi efanayo ye-Internet Protocol ethwala izingcingo zakho, amakhompyutha, namaseva. Lolo khetho olulodwa lwezakhiwo luletha ukonga okukhulu ezintanjeni, ekugcinweni, nasekuphathweni kwansuku zonke. Kulesi sihloko, sihlola ukuthi ama-SIP speaker asebenza kanjani, kungani edlula ezinye izindlela zakudala, nokuthi kungani i-OPA Co., Ltd. isiphenduke igama elithembekile kulo mkhakha.

I-OPA Co., Ltd., esebenza njenge-Guangzhou Oudim Electroacoustic Technology Co., Ltd., ingumkhiqizi osebenza ngokunemba kwezixazululo zobuchwepheshe bezinto zokuzwa ezinomsindo, enethonya eliqinile emakethe yomhlaba wonke yomsindo. Le nkampani ihlanganisa ukuqina kwezobunjiniyela nolwazi olusebenzayo lwasemkhakheni ukuze ikhiqize imishini yokumemezela esebenza ngokuthembekile ezindaweni eziyinselele zentengiselwano. Wonke umkhiqizo we-OPA udlula ekuhlolweni okuqinile kwekhwalithi, kusukela ekulinganiseni komsindo kuya ekuhlolweni kokuxhumana kwenethiwekhi, ngaphambi kokuthi ufinyelele kumakhasimende. Lokhu kuzibophezela ekhwalithini yikho okwenza abahlanganisi bezinhlelo nabaphathi bezakhiwo baqhubeke bekhetha i-OPA ekusetshenzisweni kwabo kwe-VoIP paging kanye ne-SIP audio. Ukuze uqonde ifilosofi engemuva kwalemikhiqizo, ungafunda okwengeziwe ku-Mayelana Nathi ikhasi, noma ubuke izibuyekezo zakamuva zobunjiniyela ku-Izindaba ikhasi. Ingxenye esele yalo mhlahlandlela igxile ezinzuzweni zobuchwepheshe nezohwebo ze-SIP speaker ye-OPA nokuthi ingena kanjani ohlelweni lwanamuhla lokusakaza lwe-IP.

Isipikha se-SIP iyithuluzi lokuzwa lenethiwekhi elizimele elibhalisa ngqo ku-IP PBX noma kuseva ye-SIP, njengefoni yasedeskini noma i-softphone. Lisebenzisa i-Session Initiation Protocol ukusungula izingcingo, ukuthola imisakazo yomsindo, nokwenza imiyalo yokumemezela ngaphandle kwe-analog converter noma i-external amplifier. Lapho i-dispatcher ishaya inombolo yangaphakathi noma icindezela inkinobho yokumemezela, i-PBX ihambisa iseshini kuzo zonke izipikha ze-SIP endaweni eqondiwe, futhi ithuluzi liguqule ngokushesha i-digital stream libe umsindo ocacile, okhulisiwe. Ngenxa yokuthi isipikha siyatholakala kunethiwekhi, abaphathi bangahlanganisa amadivayisi abe yizindawo, bahlele izimemezelo, futhi bazihlanganise namashejuli ezinsimbi noma amasistimu aphuthumayo. Lokhu kwenza isipikha se-SIP sihluke ngokuyisisekelo kwi-PA horn yendabuko encike kuma-amplifier amakhulu nasezintanjeni ezinde zezipikha ezikhethekile. Ngamafuphi, isipikha se-SIP siyisisekelo esibalulekile sanoma iyiphi isistimu yokumemezela ye-VoIP yesimanje, sinikeza ukulawula kwe-point-to-point okungafinyeleleki empahleni yakudala.

Ukuhlanganiswa nenethiwekhi ye-VoIP kulula ngokuphawulekayo ngoba i-SIP iyiphrothokholi evulekile, esezingeni. Isipikha se-SIP se-OPA sisekela kokubili ukubhaliswa kwe-SIP kanye nokumemezela ngamaqembu (multicast paging), okunikeza izinhlangano ithuba lokusingatha izingcingo zokuxhumana komuntu nomuntu kanye nezimemezelo zokusakaza komunye nomunye ngomshini owodwa. Ama-switch enethiwekhi akhona, ama-router, namaphoyinti okufinyelela e-Wi-Fi athwala umsindo wedijithali, okusho ukuthi akukho zintambo ezintsha ezidingekayo ezinkonzweni eziningi zokufaka kabusha. Umshini futhi wenza ukuhumusha komsindo (audio decoding) endaweni yawo, ngakho izidingo zomkhawulokudonsa zihlala zilinganiselwe noma ngabe kufakwa izipikha ezingamashumi amaningi esikhungweni. Emabhizinisini asevele esebenzisa i-IP PBX, ukwengeza isipikha se-SIP kulula njengokuxhuma eswitshini ye-Power over Ethernet nokufaka imingcele embalwa yokucushwa. Umphumela uhlelo lokumemezela nge-IP olwakhiwa ngokushesha, olulula ukulwandisa, futhi olunobuhlakani obukhulu kakhulu kunezindlela zangaphambilini ezisebenzisa ithusi.

Ukusebenza ngendlela enezindleko eziphansi kuvame ukuba yisizathu sokuqala sokuthi izinkampani zisuke ekusetshenzisweni kwama-pager endabuko ziye ezixazululweni ezisekelwe ku-SIP. Izinhlelo zokusakaza ezindala (PA systems) zidinga ama-amplifier azinikezelwe, ama-audio router, kanye nezintambo eziningi zamandla kagesi aphansi, konke lokhu kuthwala izindleko ezinkulu zezinto zokwakha nokusebenza. Isipikha se-SIP sisusa iningi laleyo hardware ngoba sisebenzisa inethiwekhi yedatha ekhona kanye ne-Power over Ethernet kokubili ukuxhumana namandla. Izindleko zokunakekela nazo ziyehla, ngoba onjiniyela benethiwekhi bangahlola futhi balawule zonke izipikha bekude, kunokuba bakhuphuke ngezitebhisi bezohlola izintambo ze-analog. Ngaphezu kwalokho, ukwengeza izindawo ezintsha noma ukuhambisa amahhovisi akusadingi kagesi, ngoba ukuxhumeka kwenethiwekhi kuphela okudingwa idivayisi. Lapho izinhlangano ziqhathanisa izindleko zokunikela ngobunikazi (total cost of ownership) esikhathini seminyaka emihlanu, ukonga okuvela ekusetshenzisweni kwe-VoIP paging ngezipikha ze-SIP kuhlala kukhanga ngokuqinisekile.

Ukuguquguquka nokwandiseka yilapho izipikha ze-SIP zikhanya ngempela kunezanduleli zazo. Ngoba isipikha ngasinye siyindawo yokugcina yenethiwekhi ezimele, ungasiqala ngeqembu elincane lamayunithi ehhovisi elilodwa bese ukhula ufinyelele emakhulwini amadivaysi ezakhiweni eziningi ngaphandle kokuklama kabusha uhlelo. Ukucushwa kwezoni kwenziwa kusofthiwe, ngakho ukushintsha izindawo zokumemezela kuthatha imizuzu kunokuba kuthathe amahora okufaka izintambo kabusha. Ihardware efanayo ingasebenza njengesiteshi se-intercom, idivaysi yokwazisa okuphuthumayo, uhlelo lwensimbi, nomdlali womculo wangemuva, kuye ngokuthi i-PBX ihlelwe kanjani. Izinhlangano ezinezizinda eziningi zingaxhuma ngisho izipikha ezemadolobheni ahlukene nge-VPN yenkampani futhi zizimemezele sengathi zisegumbini elilodwa. Lokhu kwandiseka okungokwemvelo kwenza isipikha se-SIP sibe ukukhetha okungokwemvelo kwamabhizinisi akhulayo angakwazi ukubikezela izidingo zawo zokumemezela esikhathini esizayo.

Ukuthuthukiswa kokucaca komsindo nokwethembeka kuyimiphumela eqondile yokudluliswa kwedijithali kusukela emthonjeni kuya kusipikha. Izinhlelo zokumemezela ze-analog zehlisa ikhwalithi yesignali emagejini amade ezintambo futhi zihlushwa ukukhala, ukuxutshwa kwesignali, kanye nomsindo wangemuva. Ngokuphambene, isipikha se-SIP sithola umsindo wedijithali ohlanzekile futhi senze ukukhuliswa kwendawo, ngakho izimemezelo zihlala ziqondakala ngisho nasezindaweni ezinomsindo wokukhiqiza noma ezindaweni zokwamukela ezinamazwi ananela. Ukucishwa kwemvunulo kwesimanje kanye nokulawula ukukhuliswa okuzenzakalelayo kuqhubekisela phambili ulwazi lokulalela, kuqinisekisa ukuthi abashayeli nezigqila bezwa wonke amagama. Izici zokwethembeka ezisekelwe kunethiwekhi ezifana nokudlulisela kwe-SIP nokubhaliswa kabusha okuzenzakalelayo zigcina izipikha zixhumekile ngisho nalapho i-PBX ithola ukuphazamiseka kwesikhashana. Ezindaweni ezibalulekile lapho ukungaqondwa kahle kwesimemezelo kungaba nemiphumela emibi, leli zinga lokucaca akulona ukunethezeka, liyisidingo.

Isipikha se-SIP se-OPA saklanywa ngokugxila okukodwa okungenakuphikiswa: ukukhishwa komsindo wekhwalithi ephezulu ofinyelela kuyo yonke ingxenye yesakhiwo sakho. Iyunithi ngayinye ihlanganisa idrayiva elungiselelwe ngenjongo nebhokisi eliklanywe ngokunembile eliveza amafrikhwensi ezwi ngokuqondakala okumangalisayo. Amaphethini okusabalalisa kucatshangelwe ngokucophelela ukuphakama kophahla okujwayelekile nezindawo zokufaka odongeni, ukuze isipikha esisodwa sikwazi ukusebenza ngempumelelo endaweni evulekile noma umhubhe omude. Ukusabela kwefrikhwensi ebanzi futhi kusekela umculo wangemuva nokudlalwa kwe-chime ngaphandle kokuhlanekezela kwensimbi okuvamile kwamahorni okumemezela ashibhile. Ilabhorethri ye-acoustic ye-OPA ikala yonke ibhaji yokukhiqiza ukuze iqinisekise izinga lokukhishwa, ukuhlanekezela, nokusabalalisa ngaphambi kokuba amayunithi ashiye ifektri. Umphumela uyisipikha se-SIP esizwakala sikhokhelekile egumbini lomkhandlu futhi sisakwazi ukunqamula umsindo we-workshop ematasa.

Ukufakwa kalula nokucushwa kuyizici eziyinhloko zefilosofi yokuklama ye-OPA. Isipikha sisekela i-Power over Ethernet, okusho ukuthi intambo eyodwa yenethiwekhi iletha idatha namandla, kususa isidingo sama-adaptha odongwe nochwepheshe bakagesi. Ukucushwa kwenziwa ngesikhathi esibonakalayo se-web noma ngamafayela okuhlinzeka, okuvumela abasebenzi be-IT ukuthi bacushe amayunithi amaningi ngaphambi kokufakwa ngokomzimba. I-OPA ihlinzeka ngemihlahlandlela eningiliziwe yokufakwa namathempulethi ezinkundla ezidumile ze-PBX, inciphisa isikhathi sokumisa kusuka emahoreni kuye emizuzwini. Izibuyekezo ze-firmware zilethwa ukude, ngakho ukuthuthukiswa nezichibiyelo zokuphepha zifinyelela kuyo yonke idivayisi ngaphandle kokuvakashelwa endaweni. Noma ngabe ungumhlanganisi wezinhlelo ophethe ukukhishwa okukhulu noma umphathi wehhovisi engeza iyunithi eyodwa, isipikha se-SIP se-OPA saklanyelwe ukuthi sisebenze ngokushesha.

Ukuhambisana nezinhlelo ezinkulu ze-PBX ezisekelwe ku-SIP kungenye yamandla ayinhloko omkhiqizo we-OPA. Izipikha zihlolwe futhi zaqinisekiswa ngokuqhathaniswa namapulatifomu ahamba phambili, okuhlanganisa i-Asterisk, i-FreePBX, i-Yeastar, i-3CX, i-Grandstream UCM, ne-Cisco Call Manager, kanye nezinsiza ezidumile ze-cloud PBX. Lokhu kusebenzisana okubanzi kusho ukuthi awukaze uboshwe ohlelweni olungokwakho uma ukhetha i-OPA. Idivayisi futhi isekela amaphrothokholi ajwayelekile afana ne-SIP 2.0, i-RTSP streaming, kanye ne-multicast paging, okunikeza abahlanganisi izindlela eziningi zokuyixhuma engqalasizinda ekhona. Ezinhlanganweni ezisuka ohlelweni oludala, ukuhambisana kwe-OPA kunciphisa ubungozi nezindleko zokuhlanganisa kakhulu. Imininingwane eningiliziwe yobuchwepheshe nezibonelo zokumisa ziyatholakala ku-Imikhiqizo ikhasi kuyo yonke imodeli ebangeni.

Amaphrothokholi okuvikeleka namanethiwekhi aqinile avikela isikhulumi kanye nenethiwekhi yebhizinisi ebanzi. Sonke isikhulumi se-SIP se-OPA sisekela izindlela zokudlulisa ezivikelekile, okuhlanganisa ukubethela kwe-TLS kokusayina kanye ne-SRTP yemithombo yokusakaza ebetheliwe. Idivayisi ihambisana ne-802