
ring down

telephonylo, ringdown anedi operatorku sanketam ichhe oka paddhati, dheenilo telephone ringing karentnu line operate cheyadaaniki ledhaa "drop" anie piluvabade selph-locking rile yokka operationku kaaranamayyelaa linepy pampabadutundi.
ringdown anedi manueval operationlo upayoginchabadutundi, mariyu oka sankhyanu dial cheyadam dwara automatic signalling nundi vaeru cheyabadutundi. eee sankethamlo rekhapai prasaram cheyabadina nirantara ledhaa pulsed alternating current (esi) sanketam untundi. dheenini telephone switchboardutho ledhaa lekunda upayoginchavacchu. eee padam magneto telephone signalinglo udbhavinchindi, dheenilo magneto generator, telephone setlo vileenam cheyabadi ledhaa anusandhaaninchabadina ringer baxlo unchabadi, daani gantanu "ring" cheyadame kakunda, telephone exchange switchboard vadda "down" padipovadaaniki kooda kaaranamavutundi, idhi magneto telephone parikaram anusandhaaninchabadina line sankhyatho gurtinchabadindi. 
united stateslo chivari ringdown telephone exchange maineloni bryant cheruvulo undhi, 400 + mandhi chandaadaarulanu kaligi undhi mariyu october 1983loe dial sevagaa maarchabadindi.
ringdown operator.
manueval chandaadaarula kosam ledhaa dial cheyaleni paayintla kosam suduura automated exchangeela nundi calls vachhe telephone vyavasthalalo, tarachugaa oka ringdown operator (npa + 181 dial cheyadam dwara suduura operator console nundi cherukovacchu) untaaru, vaaru party line ledhaa toll stationlo kaavalasina chandaadaarulaku manyuvalga coll chestaaru. konni vyavasthalalo, eee functionnu invered operator (npa + 121) nirvahinchindi. rendu sandarbhaallo, idhi gamyasthaanamlo unna telephone operator, athanu inbound toll calls meeda itara operatorlaku matrame sahayam andistaadu; ringdown operator namamatramga chandaadaaru dwara neerugaa dial cheyabadadu.
naan-operator upayogam.
telephone operator thoo kuudina "kaadu" anae application loe, rendu-paayintla automatic ringdown circuit ledhaa ringdown, prati chivara telephone untundi. oka vaipuna unna phone off-hook ayinappudu, maroka vaipuna unna phone ventane mogutundi. dial cheyadam ledhu, anduvalla dial laeni telephone setlanu konnisaarlu upayogistaaru.
aneka ringdown circuitlu rendu disalalo panicheestaayi. konni sandarbhaallo circuit oka disalo matrame panicheyadaaniki roopondinchabadindi. antey, oka chivara off-hook (end eah) kii velladam maroka chivara (end bii) kii ring avutundi. end b vadda off-hook cheyadam anedi eah end vadda etuvanti prabhavam chuupadu.
ringdown lakshanaalu tarachugaa keelaka telephone vyavasthalo bhaagamgaa untaayi. bell system 1a2 yokka wire spring rile kii servies unitlalo, circuitnu nirvahinchadaaniki modal 216 automatic ringdown upayoginchabadindi. 400-syries unitlalo, aneka rakaala ktusలు 415 namuunaatoe sahaa ringdown nuu nirvahistaayi (paryaveekshistaayi). itara paristhitulalo, ringdown telephone exchange lopala parikaraala dwara saktini pondutundi mariyu nirvahinchabadutundi.
private branch exchange (pbx) switch unna samsthala vishayamlo, ring down nuu pbx kii dwara nirvahinchavacchu. nirvachinchina podigimpu (calling phone) off-hook ayinappudu nirdishta podigimpunu (coll chesina phone) ring cheyadaaniki switch programme cheyabadutundi. pii. bii. ex. coll podigimpuku dial tone andinchaduh idhi aann-hook ledhaa off-hook sthithini matrame gurtistundi.
vois ovar aipi adapterlanu network chesi, svayamchaalaka ringdown andinchadaaniki dial plannu enchukovadam dwara configure cheyavachu, idhi khaalii stringnu mundugaa nirvachinchina sankhya ledhaa sip chirunamatho bharti chestundi, ventane dial cheyabadutundi. (konni sisko voip phonelu mariyu analog adapterlu (s0 <: 1234567890>) dial plannu hotline aakruteekaranagaa pariganistaayi, idhi phone off-hook ayina tarvaata 1-234-567890 sunna sekanlaku dial chestundi, udaaharanaku).
eee circuitlu upayoginchabadataayih
konni sandarbhaallo, automatic ringdown circuitlu okati nundi aneka aakruteekaranalanu kaligi untaayi. oka phone off-hook ayinappudu, phonela samuuham ekakaalamlo ring cheyabadutundi.
circuit yokka okati ledhaa rendu chivaralanu kii telephone vyavasthalo muginche sandarbhaallo, paryaveekshanha calling party controll (sipisi) signalnu andiste tappa baga roopondinchina vyavasthaku ringdown circuitlo etuvanti hold feature undadu.
plar.
private line automatic ringdown (plar) anedi telephone aadhaarita vyavasthalalo tarachugaa upayoginche oka rakamaina analog signalling. oka parikaranni off-hook chesinappudu, lineloni itara stationlanu apramattam cheyadaaniki ringing voltage svayamchaalakamgaa circuitku vartinchabadutundi. maroka stationlo samadhanam icchinappudu, circuit meeda coll nirvahinchabadutundi. telephone company switch eee prakriyaloo paalgonaledu, idhi private linega maarutundi.