1. I-PoE engekho mgangathweni kunye ne-PoE esemgangathweni

Kumgangatho we-PoE ohambelana nemigangatho ye-IEEE 802.3af/at/bt kwaye ineprothokholi yokuxhawula izandla.I-PoE engekho mgangathweni ayinayo iprotocol yokuxhawula izandla, kwaye ibonelela nge-12V, 24V okanye i-48V DC esisigxina yombane.

Ukutshintshwa kombane oqhelekileyo we-PoE une-chip yokulawula i-PoE ngaphakathi, enomsebenzi wokufumanisa ngaphambi kokunikezelwa kwamandla.Xa isixhobo siqhagamshelwe, unikezelo lwamandla lwe-PoE luya kuthumela isignali kwinethiwekhi ukuze ibone ukuba i-terminal kwinethiwekhi sisixhobo sePD esixhasa unikezelo lwamandla lwe-PoE.Imveliso yePoE engeyiyo eyomgangatho sisixhobo esinyanzelweyo sonikezelo lwentambo yombane yenethiwekhi, ebonelela ngamandla ngokukhawuleza xa ilayitiwe.Akukho nyathelo lokufumanisa, kwaye inika amandla kungakhathaliseki ukuba i-terminal sisixhobo esinikwe amandla se-PoE, kwaye kulula kakhulu ukutshisa isixhobo sokufikelela.

2. Iindlela eziqhelekileyo zokuchongwa kweeswitshi ze-PoE ezingekho mgangathweni

Ngoko ke ungahlula njani iiswitshi ze-PoE ezingekho mgangathweni?Ezi ndlela zilandelayo zinokuzanywa.

a.Jonga umbane

Okokuqala, jonga ngokufanelekileyo kwi-voltage yokubonelela.I-IEEE 802.3 af/at/bt protocol imisela ukuba uluhlu lombane lwe-PoE port output luphakathi kwe-44-57V.Onke amandla ombane asemgangathweni ngaphandle kwe-48V ayimveliso engekho mgangathweni, njengemveliso eqhelekileyo ye-12V kunye ne-24V yombane.Nangona kunjalo, unikezelo lwamandla lwe-48V lusenokungabi yimveliso eqhelekileyo ye-PoE, ngoko ke isixhobo sokulinganisa amandla ombane esifana ne-multimeter siyafuneka ukuyichonga.

b.Ukulinganisa nge-multimeter

Qala isixhobo, uhlengahlengise i-multimeter kwindawo yokulinganisa umbane, kwaye uchukumise izikhonkwane zobonelelo lwamandla kwisixhobo se-PSE ngeepeni ezimbini ze-multimeter (ngokuqhelekileyo 1/2, 3/6 okanye 4/5, 7/8 ye-RJ45 port ), ukuba isixhobo esinemveliso ezinzileyo ye-48V okanye amanye amaxabiso ombane (12V, 24V, njl.) ilinganiswa, yimveliso engeyiyo eqhelekileyo.Ngenxa yokuba kule nkqubo, i-PSE ayiboni izixhobo ezinikwe amandla (nantsi i-multimeter), kwaye isebenzisa ngokuthe ngqo i-48V okanye amanye amaxabiso ombane kunikezelo lwamandla.

Ngokwahlukileyo, ukuba i-voltage ayinakulinganiswa kwaye inaliti ye-multimeter igxuma phakathi kwe-2 kunye ne-18V, yi-PoE eqhelekileyo.Ngenxa yokuba ngeli nqanaba, i-PSE ivavanya i-terminal ye-PD (nantsi i-multimeter), kwaye i-multimeter ayiyona iPD yomthetho, i-PSE ayiyi kunika amandla, kwaye akukho mbane ozinzile uya kuveliswa.

c.Ngoncedo lwezixhobo ezifana ne-PoE detectors

Ukuze kuququzelelwe ukufakwa kweprojekthi kunye nabasebenzi bolawulo ukuchonga ngokukhawuleza kwaye babone imigca yenethiwekhi ye-PoE, qaphela ukuba isignali yenethiwekhi inokunikezelwa kwamandla e-PoE, nokuba i-PoE isebenza ngokuqhelekileyo, kwaye ingaba isixhobo singumgangatho wePoE okanye imveliso ye-PoE engeyiyo, i-Utop uphuhlise isixhobo sokubona iPoE.

Le mveliso ixhasa ukubonwa kwe-middle-span (4/5 7/8) kunye nokufumanisa ukuphela kwexesha (1/2 3/6), ixhasa i-IEEE802.3 af/kwi-PoE eqhelekileyo kunye ne-PoE engeyiyo eqhelekileyo;Probe PoE interface okanye intambo.Qhagamshela nje i-detector ye-PoE kwinethiwekhi esebenzayo, kwaye i-LED ebekwe kwi-PoE detector iya kukhanyisa okanye i-blink.Ukuqhwanyaza kuthetha i-PoE esemgangathweni, ukukhanya okuzinzileyo kuthetha i-PoE engekho mgangathweni.Isixhobo esincinci sokufumanisa sinokubonelela ngokulula kulwakhiwo lobunjineli.