電(dian)(dian)(dian)話[英語：Telephone，出(chu)自希臘語τ?λε（tēle，意為(wei)“遠”）和φων?（phōnē，意為(wei)“聲(sheng)音”），舊譯德律(lv)風]是一(yi)種可(ke)(ke)以(yi)傳(chuan)送與接收聲(sheng)音的(de)遠程通(tong)信設(she)備。早(zao)在18世紀歐(ou)洲已有“電(dian)(dian)(dian)話”一(yi)詞，用(yong)來指用(yong)線(xian)串(chuan)成的(de)話筒（以(yi)線(xian)串(chuan)起(qi)杯子）。電(dian)(dian)(dian)話的(de)出(chu)現要歸(gui)功于(yu)亞歷山大·格(ge)拉漢(han)姆·貝爾，早(zao)期電(dian)(dian)(dian)話機(ji)的(de)原理為(wei)：說話聲(sheng)音為(wei)空氣里的(de)復合振動，可(ke)(ke)傳(chuan)輸到固體(ti)上，通(tong)過電(dian)(dian)(dian)脈沖于(yu)導電(dian)(dian)(dian)金屬上傳(chuan)遞。貝爾于(yu)1876年3月申請了電(dian)(dian)(dian)話的(de)專利權(quan)。
美國國會2002年6月15日(ri)269號決議確認(ren)安東尼奧(ao)·穆(mu)齊(qi)為電話的發明人。穆(mu)齊(qi)于1860年首次向公眾展示(shi)了(le)他的發明，并在紐約的意(yi)大(da)利語報紙(zhi)上發表了(le)關(guan)于這項(xiang)發明的介紹。
歷史上對電(dian)話(hua)(hua)的改進和發明包括：碳粉(fen)話(hua)(hua)筒、人工交(jiao)換(huan)板、撥號盤、自動電(dian)話(hua)(hua)交(jiao)換(huan)機(ji)、程(cheng)控電(dian)話(hua)(hua)交(jiao)換(huan)機(ji)、雙音多頻撥號、語音數(shu)字(zi)采(cai)樣等(deng)。近年來的新技術包括：ISDN、DSL、網絡電(dian)話(hua)(hua)、模(mo)擬移動電(dian)話(hua)(hua)和數(shu)字(zi)移動電(dian)話(hua)(hua)等(deng)。
這(zhe)一(yi)行(xing)業通常(chang)分(fen)(fen)為電(dian)(dian)話(hua)設備制造商和(he)電(dian)(dian)話(hua)網絡(luo)運(yun)營商。在(zai)歷史上，網絡(luo)運(yun)營商通常(chang)都擁(yong)有(you)全國(guo)性的(de)(de)(de)壟(long)斷。近年(nian)來，隨著全球電(dian)(dian)信市場的(de)(de)(de)開放和(he)集成(cheng)以及技術的(de)(de)(de)發展，逐漸出現多家運(yun)營商在(zai)同(tong)一(yi)市場競(jing)爭的(de)(de)(de)局面。例如(ru)，貝(bei)爾系統(tong)，即AT&T的(de)(de)(de)下(xia)屬公(gong)司(si)曾擁(yong)有(you)美國(guo)電(dian)(dian)話(hua)市場的(de)(de)(de)80%。1984年(nian)，由于美國(guo)司(si)法部反壟(long)斷訴(su)訟(song)，貝(bei)爾系統(tong)被迫分(fen)(fen)區(qu)成(cheng)多個獨立的(de)(de)(de)地(di)方貝(bei)爾公(gong)司(si)。有(you)一(yi)個說(shuo)法可(ke)以說(shuo)明這(zhe)個現象(xiang)：在(zai)AT&T未(wei)分(fen)(fen)區(qu)前，IBM是美國(guo)第二大公(gong)司(si)。在(zai)AT&T分(fen)(fen)區(qu)成(cheng)七(qi)個公(gong)司(si)后，IBM的(de)(de)(de)排(pai)名變成(cheng)第八名。
電(dian)話機是通過(guo)電(dian)信號(hao)雙向傳輸話音(yin)的終端設備。
歷史(shi)上(shang)對電話(hua)(hua)機(ji)(ji)的改進和發明包(bao)括：碳(tan)粉(fen)話(hua)(hua)筒、電話(hua)(hua)人工交(jiao)換(huan)(huan)(huan)板(ban)、撥號(hao)(hao)盤(pan)、自動電話(hua)(hua)交(jiao)換(huan)(huan)(huan)機(ji)(ji)、程控(kong)電話(hua)(hua)交(jiao)換(huan)(huan)(huan)機(ji)(ji)、雙音多頻撥號(hao)(hao)、語音數(shu)字(zi)采樣等(deng)(deng)。新(xin)技(ji)術包(bao)括：ISDN、DSL、模擬移(yi)動電話(hua)(hua)和數(shu)字(zi)移(yi)動電話(hua)(hua)機(ji)(ji)等(deng)(deng)。
電(dian)話(hua)(hua)電(dian)源(yuan)線(xian)(xian)、電(dian)話(hua)(hua)線(xian)(xian)、收線(xian)(xian)開(kai)關、受話(hua)(hua)器(qi)、增(zeng)音(yin)按(an)鈕、送話(hua)(hua)器(qi)、本機(ji)號碼(ma)(ma)片、鈴聲(sheng)及免提喇叭(ba)、記(ji)憶代(dai)碼(ma)(ma)鍵(jian)(jian)、記(ji)憶號碼(ma)(ma)片、數字按(an)鍵(jian)(jian)、記(ji)憶取(qu)出(chu)鍵(jian)(jian)、記(ji)憶儲存鍵(jian)(jian)、重撥(bo)鍵(jian)(jian)、工作(zuo)指(zhi)示燈、免提鍵(jian)(jian)、R鍵(jian)(jian)、免提送話(hua)(hua)器(qi)、鈴聲(sheng)調(diao)節開(kai)關、P/T開(kai)關、免提接收音(yin)量(liang)調(diao)節旋鈕。
電話通(tong)信(xin)是通(tong)過聲能與(yu)電能相互轉換(huan)、并利用(yong)“電”這個(ge)媒(mei)介(jie)來(lai)傳輸(shu)語言的一種(zhong)通(tong)信(xin)技術。兩個(ge)用(yong)戶要進(jin)行通(tong)信(xin)，最簡單的形式就是將兩部電話機用(yong)一對(dui)線(xian)路(lu)連接起(qi)來(lai)。
當(dang)發話(hua)者拿起電話(hua)機對著送(song)話(hua)器講(jiang)話(hua)時，聲帶的振動激勵空(kong)氣振動，形(xing)成聲波。
聲波(bo)作用于送話器上，使之產生電流(liu)(liu)，稱為話音電流(liu)(liu)。
話(hua)音電流沿著線路傳送(song)到(dao)對方電話(hua)機的受話(hua)器內。
而受話器作用(yong)與送話器剛(gang)好相反(fan)——把電(dian)流轉(zhuan)化為聲波，通過空氣(qi)傳至人的耳朵中。
這樣(yang)，就完成了最(zui)簡(jian)單(dan)的(de)通(tong)話(hua)過程。
電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)是美(mei)國人A.G.貝(bei)爾于1876年(nian)(nian)發(fa)(fa)(fa)明的(de)。他用(yong)兩(liang)根(gen)導線(xian)連接(jie)(jie)兩(liang)個(ge)結構完全(quan)相同、在(zai)電(dian)(dian)(dian)(dian)(dian)磁鐵上裝有(you)振動(dong)膜片的(de)送(song)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)器(qi)和(he)受話(hua)(hua)(hua)(hua)(hua)(hua)(hua)器(qi)，首先(xian)實(shi)現(xian)兩(liang)端通(tong)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)。但通(tong)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)距(ju)離(li)短、效(xiao)率(lv)低(di)。1878年(nian)(nian)出(chu)(chu)現(xian)了(le)炭(tan)精送(song)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)器(qi)，使電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)送(song)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)器(qi)效(xiao)率(lv)大(da)大(da)提高(gao)。受話(hua)(hua)(hua)(hua)(hua)(hua)(hua)器(qi)結構也有(you)改(gai)進。最早的(de)電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)是磁石電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)，靠自備電(dian)(dian)(dian)(dian)(dian)池(chi)供電(dian)(dian)(dian)(dian)(dian)，用(yong)手搖發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)發(fa)(fa)(fa)送(song)呼叫(jiao)信號(hao)。1880年(nian)(nian)出(chu)(chu)現(xian)共電(dian)(dian)(dian)(dian)(dian)式(shi)電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)，改(gai)由共電(dian)(dian)(dian)(dian)(dian)交(jiao)(jiao)換(huan)(huan)機(ji)(ji)(ji)(ji)集中供電(dian)(dian)(dian)(dian)(dian)，省去手播發(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)和(he)干電(dian)(dian)(dian)(dian)(dian)池(chi)。1891年(nian)(nian)出(chu)(chu)現(xian)了(le)旋轉(zhuan)撥(bo)號(hao)盤式(shi)自動(dong)電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)，它可以發(fa)(fa)(fa)出(chu)(chu)直(zhi)流撥(bo)號(hao)脈沖(chong)，控制(zhi)自動(dong)交(jiao)(jiao)換(huan)(huan)機(ji)(ji)(ji)(ji)動(dong)作(zuo)，選擇被叫(jiao)用(yong)戶，自動(dong)完成交(jiao)(jiao)換(huan)(huan)功(gong)能(neng)。從(cong)而(er)把電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)通(tong)信推向(xiang)一(yi)個(ge)新(xin)階段。到20世(shi)紀60年(nian)(nian)代末期出(chu)(chu)現(xian)了(le)按鍵式(shi)全(quan)電(dian)(dian)(dian)(dian)(dian)子電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)。除(chu)脈沖(chong)發(fa)(fa)(fa)號(hao)方(fang)式(shi)外(wai)，又出(chu)(chu)現(xian)了(le)雙(shuang)音多頻(pin)(pin)（DTMF）發(fa)(fa)(fa)號(hao)方(fang)式(shi)。隨(sui)著程控交(jiao)(jiao)換(huan)(huan)機(ji)(ji)(ji)(ji)的(de)發(fa)(fa)(fa)展，雙(shuang)音頻(pin)(pin)按鍵電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)已逐(zhu)步普及。電(dian)(dian)(dian)(dian)(dian)子電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)路正在(zai)向(xiang)集成化邁(mai)進，話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)專(zhuan)用(yong)集成電(dian)(dian)(dian)(dian)(dian)路已廣泛(fan)用(yong)于話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)路各組(zu)成部分。各種多功(gong)能(neng)電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)和(he)特(te)種用(yong)途電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)也應運而(er)生。到20世(shi)紀90年(nian)(nian)代初，已有(you)了(le)將撥(bo)號(hao)、通(tong)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)、振鈴三種功(gong)能(neng)集于一(yi)塊(kuai)集成電(dian)(dian)(dian)(dian)(dian)路上的(de)電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)。隨(sui)著話(hua)(hua)(hua)(hua)(hua)(hua)(hua)音識別技(ji)術的(de)發(fa)(fa)(fa)展，直(zhi)接(jie)(jie)用(yong)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)音“撥(bo)號(hao)”的(de)新(xin)型電(dian)(dian)(dian)(dian)(dian)話(hua)(hua)(hua)(hua)(hua)(hua)(hua)機(ji)(ji)(ji)(ji)也正在(zai)出(chu)(chu)現(xian)。
最初的電(dian)(dian)(dian)話機(ji)(ji)（終端）是由微型發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)和電(dian)(dian)(dian)池(chi)構(gou)(gou)成的磁石式電(dian)(dian)(dian)話機(ji)(ji)，打電(dian)(dian)(dian)話時，使(shi)用者用手搖微型發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)機(ji)(ji)發(fa)(fa)(fa)(fa)出電(dian)(dian)(dian)信(xin)號呼叫對(dui)(dui)方，對(dui)(dui)方啟機(ji)(ji)后構(gou)(gou)成通(tong)(tong)話回路(lu)。后來，1877年(nian)愛迪(di)生（T.E.Edison）發(fa)(fa)(fa)(fa)明了碳素送話器(qi)和誘導(dao)線路(lu)后通(tong)(tong)話距離延(yan)長了。同(tong)一年(nian)又發(fa)(fa)(fa)(fa)明了共(gong)電(dian)(dian)(dian)式電(dian)(dian)(dian)話機(ji)(ji)。1891年(nian)終于發(fa)(fa)(fa)(fa)展到A.B.Strowger發(fa)(fa)(fa)(fa)明了自(zi)動式電(dian)(dian)(dian)話機(ji)(ji)。
電(dian)話機設(she)置在電(dian)話通信起點(dian)和終(zhong)點(dian)的(de)(de)用戶側，是(shi)(shi)電(dian)話網的(de)(de)用戶終(zhong)端設(she)備。現代的(de)(de)電(dian)話機能夠方便地實現終(zhong)端用戶之間的(de)(de)呼(hu)叫和通話，是(shi)(shi)經過(guo)一百多年來許(xu)多人的(de)(de)研究和無數次的(de)(de)改進而形成(cheng)的(de)(de)。盡管它們的(de)(de)式(shi)樣千差萬(wan)別，但一般都有如(ru)下基本功能：
1、聲電互換
因為要進(jin)行快速的、遠距離(li)的通(tong)信(xin)，不能直接傳送(song)聲(sheng)(sheng)音，而必須先把聲(sheng)(sheng)音變成電(dian)(dian)信(xin)號（即以電(dian)(dian)作(zuo)為載體），到對方后再把電(dian)(dian)信(xin)號還原成為聲(sheng)(sheng)音。
2、摘機識別
當主叫方拿起電(dian)話機時(shi)，交換(huan)機應有能(neng)知道“有人要(yao)打(da)電(dian)話”的(de)功能(neng)，以便交換(huan)機做(zuo)好接(jie)續(xu)準備。
3、發送信號
自動電話機(ji)(ji)正是(shi)通(tong)過(guo)發(fa)送撥號(hao)信號(hao)來指揮電話交換機(ji)(ji)的工作(zuo)，并進而(er)建(jian)立兩個電話機(ji)(ji)之間的連(lian)接的。
4、響鈴
即在(zai)對(dui)方(fang)來電(dian)話時，電(dian)話機能以鈴聲(sheng)告訴主人(ren)：“有人(ren)來電(dian)話了。”
5、電接續
電話機中，實現這五大功能(neng)的部件依(yi)次是：送受話器(qi)、叉(cha)簧、撥(bo)號盤(pan)（或按鍵盤(pan)）、電話鈴和電話回路(lu)。
電(dian)(dian)(dian)話(hua)(hua)(hua)(hua)機(ji)具(ju)有(you)(you)將(jiang)(jiang)(jiang)(jiang)終端的(de)(de)(de)(de)(de)(de)(de)音(yin)(yin)波轉(zhuan)換為(wei)電(dian)(dian)(dian)子信號，通過電(dian)(dian)(dian)話(hua)(hua)(hua)(hua)線傳(chuan)送(song)(song)(song)(song)(song)到(dao)遠距離的(de)(de)(de)(de)(de)(de)(de)對(dui)方(fang)，同時將(jiang)(jiang)(jiang)(jiang)對(dui)方(fang)傳(chuan)送(song)(song)(song)(song)(song)來的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)子信號再生為(wei)語(yu)音(yin)(yin)（音(yin)(yin)波），使其通話(hua)(hua)(hua)(hua)的(de)(de)(de)(de)(de)(de)(de)功能，以及發(fa)(fa)送(song)(song)(song)(song)(song)可從多個對(dui)方(fang)中選擇的(de)(de)(de)(de)(de)(de)(de)信號（撥號脈(mo)沖），告知(zhi)對(dui)方(fang)的(de)(de)(de)(de)(de)(de)(de)呼(hu)叫(jiao)音(yin)(yin)等功能。電(dian)(dian)(dian)話(hua)(hua)(hua)(hua)機(ji)由(you)將(jiang)(jiang)(jiang)(jiang)語(yu)音(yin)(yin)轉(zhuan)換為(wei)電(dian)(dian)(dian)流(liu)發(fa)(fa)送(song)(song)(song)(song)(song)到(dao)電(dian)(dian)(dian)話(hua)(hua)(hua)(hua)線的(de)(de)(de)(de)(de)(de)(de)送(song)(song)(song)(song)(song)話(hua)(hua)(hua)(hua)機(ji)、將(jiang)(jiang)(jiang)(jiang)對(dui)方(fang)傳(chuan)送(song)(song)(song)(song)(song)來的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)流(liu)還原為(wei)語(yu)音(yin)(yin)的(de)(de)(de)(de)(de)(de)(de)受話(hua)(hua)(hua)(hua)機(ji)、呼(hu)叫(jiao)對(dui)方(fang)的(de)(de)(de)(de)(de)(de)(de)撥號或按鈕、發(fa)(fa)送(song)(song)(song)(song)(song)呼(hu)叫(jiao)音(yin)(yin)的(de)(de)(de)(de)(de)(de)(de)鈴聲(sheng)、將(jiang)(jiang)(jiang)(jiang)這些連接(jie)在電(dian)(dian)(dian)話(hua)(hua)(hua)(hua)線上執(zhi)行其功能的(de)(de)(de)(de)(de)(de)(de)線路網等組成(cheng)。送(song)(song)(song)(song)(song)話(hua)(hua)(hua)(hua)機(ji)內有(you)(you)裝滿碳(tan)素(su)顆粒的(de)(de)(de)(de)(de)(de)(de)小箱子，其前方(fang)有(you)(you)薄(bo)硬鋁合金(jin)振動(dong)板。振動(dong)板根據(ju)語(yu)音(yin)(yin)振動(dong)，振動(dong)碳(tan)素(su)顆粒，碳(tan)素(su)顆粒傳(chuan)導電(dian)(dian)(dian)流(liu)，隨著顆粒的(de)(de)(de)(de)(de)(de)(de)接(jie)觸(chu)程度，電(dian)(dian)(dian)阻發(fa)(fa)生變化(hua)，生成(cheng)語(yu)音(yin)(yin)電(dian)(dian)(dian)流(liu)。受話(hua)(hua)(hua)(hua)機(ji)接(jie)受對(dui)方(fang)的(de)(de)(de)(de)(de)(de)(de)語(yu)音(yin)(yin)電(dian)(dian)(dian)流(liu)后(hou)，在線圈上生成(cheng)語(yu)音(yin)(yin)電(dian)(dian)(dian)流(liu)引起的(de)(de)(de)(de)(de)(de)(de)磁(ci)力(li)，振動(dong)鐵(tie)振動(dong)板，發(fa)(fa)出聲(sheng)音(yin)(yin)。
無線環(huan)路-無繩電話
電話子母機
數字無繩電話
模擬無繩電話
移動電話手機
小靈通（無線電話）
隨著IT技術的(de)不斷的(de)飛速發展，嵌入式終端設備的(de)處理(li)能力越(yue)來越(yue)強，21世紀初出(chu)現(xian)了一(yi)種帶(dai)個人數據助(zhu)理(li)（PDA）的(de)電話機“智能電話”。
智能(neng)(neng)(neng)(neng)(neng)電(dian)話(hua)(hua)除(chu)了(le)有(you)(you)完整的固(gu)(gu)定電(dian)話(hua)(hua)功能(neng)(neng)(neng)(neng)(neng)外，通常還具有(you)(you)大容(rong)量的名(ming)片管理(li)(li)功能(neng)(neng)(neng)(neng)(neng)、來去電(dian)管理(li)(li)功能(neng)(neng)(neng)(neng)(neng)、防止(zhi)電(dian)話(hua)(hua)騷(sao)擾（電(dian)話(hua)(hua)防火(huo)墻）功能(neng)(neng)(neng)(neng)(neng)、企業集團電(dian)話(hua)(hua)名(ming)片（內部名(ming)片）管理(li)(li)功能(neng)(neng)(neng)(neng)(neng)，以及輔助(zhu)辦公的許多功能(neng)(neng)(neng)(neng)(neng)，比如：日程安排、便(bian)箋、日歷、計算(suan)器(qi)等功能(neng)(neng)(neng)(neng)(neng)。早期(qi)的智能(neng)(neng)(neng)(neng)(neng)電(dian)話(hua)(hua)通過撥(bo)號上網，具有(you)(you)一定的信息交換能(neng)(neng)(neng)(neng)(neng)力(li)，實現了(le)發(fa)送短信、接收文字(zi)信息的功能(neng)(neng)(neng)(neng)(neng)。隨著(zhu)固(gu)(gu)網智能(neng)(neng)(neng)(neng)(neng)電(dian)話(hua)(hua)在中(zhong)國近十年的發(fa)展，其(qi)處理(li)(li)能(neng)(neng)(neng)(neng)(neng)力(li)加強，逐漸地增加了(le)智能(neng)(neng)(neng)(neng)(neng)手(shou)機（Smartphone）具有(you)(you)的功能(neng)(neng)(neng)(neng)(neng)。
智(zhi)能(neng)電話(hua)已有(you)通(tong)過因特網上網的(de)能(neng)力(li)及較強的(de)多媒的(de)體功(gong)能(neng)。可(ke)以進行網絡瀏覽、音視(shi)頻的(de)播放、具有(you)電子(zi)書、電子(zi)相框等功(gong)能(neng)。同時智(zhi)能(neng)電話(hua)在輔助辦公、輔助營(ying)銷、娛樂等方面的(de)功(gong)能(neng)也有(you)了(le)大大的(de)加強。在對傳統固(gu)定電話(hua)顛覆的(de)基礎上，實(shi)現(xian)了(le)更多的(de)商務功(gong)能(neng)和PDA功(gong)能(neng)。
環境溫(wen)度(du)：-10℃~40℃
相對(dui)濕度(du)：45%~95%
大氣(qi)壓力：860~1060mbar
環境(jing)噪聲：≤60dB(A)
1、工作頻率：300~3400HZ
2、脈沖通斷比(bi)：1.6±0.2∶1
3、雙音(yin)頻(pin)(pin)撥號頻(pin)(pin)偏：≤±1.5%
4、雙音頻(pin)(pin)(pin)(pin)信號電平：①低頻(pin)(pin)(pin)(pin)群：-9±3dB；②高(gao)頻(pin)(pin)(pin)(pin)群：-7±3dB；③頻(pin)(pin)(pin)(pin)率組(zu)合中高(gao)頻(pin)(pin)(pin)(pin)分(fen)量(liang)比低頻(pin)(pin)(pin)(pin)分(fen)量(liang)高(gao)2±1dB
5、振(zhen)鈴聲級：≥70dB(A)
6、電聲性能：
①在(zai)0公(gong)里時(shi)(shi)，客(ke)觀(guan)(guan)發送(song)參(can)考(kao)當量≥+3；在(zai)3公(gong)里時(shi)(shi)，客(ke)觀(guan)(guan)發送(song)參(can)考(kao)當量≤+15；在(zai)5公(gong)里時(shi)(shi)，客(ke)觀(guan)(guan)發送(song)參(can)考(kao)當量≤+15。
②在0公(gong)里時(shi)，客觀(guan)(guan)接(jie)收(shou)參(can)考(kao)當(dang)量(liang)≥－5；在3公(gong)里時(shi)，客觀(guan)(guan)接(jie)收(shou)參(can)考(kao)當(dang)量(liang)≤+2；在5公(gong)里時(shi)，客觀(guan)(guan)接(jie)收(shou)摻考(kao)當(dang)量(liang)≤+2。
③在(zai)0公(gong)里時(shi)，客觀側(ce)音參(can)考(kao)當(dang)量(liang)≥+3；在(zai)3公(gong)里時(shi)，客觀側(ce)音參(can)考(kao)當(dang)量(liang)≥+10；在(zai)5公(gong)里時(shi)，客觀側(ce)音參(can)考(kao)當(dang)量(liang)≥+10。
高(gao)(gao)科(ke)技電(dian)(dian)話(hua)(hua)機(ji)的發(fa)(fa)展(zhan)(zhan)都(dou)是(shi)隨著(zhu)無線通信(xin)(xin)的發(fa)(fa)達而形成的。電(dian)(dian)話(hua)(hua)機(ji)的發(fa)(fa)展(zhan)(zhan)趨勢經過Digital電(dian)(dian)話(hua)(hua)機(ji)和PCS后發(fa)(fa)展(zhan)(zhan)到可(ke)以(yi)用衛星通信(xin)(xin)的IMT-200服務。IMT-200支持信(xin)(xin)息的高(gao)(gao)速傳送(song)，Packet，畫像等多媒體的服務，將來(lai)世界各(ge)個地方都(dou)可(ke)以(yi)使(shi)用所有聲音電(dian)(dian)話(hua)(hua)，電(dian)(dian)報用戶(hu)直通電(dian)(dian)路(lu)，傳呼和電(dian)(dian)子郵件；隨著(zhu)電(dian)(dian)子郵件的普及，網(wang)絡(luo)也日益化，網(wang)絡(luo)電(dian)(dian)話(hua)(hua)已(yi)是(shi)不(bu)可(ke)阻擋的發(fa)(fa)展(zhan)(zhan)趨勢。現有的固(gu)(gu)定電(dian)(dian)話(hua)(hua)，已(yi)經不(bu)能提(ti)供(gong)人們(men)的需(xu)要了。未來(lai)的固(gu)(gu)定電(dian)(dian)話(hua)(hua)講裝備攝像頭，帶有色彩的液晶顯示器，我們(men)在(zai)接(jie)固(gu)(gu)定電(dian)(dian)話(hua)(hua)的時候，都(dou)能夠看到雙方。
精靈世界
】編輯上傳提(ti)供，詞(ci)條屬于開放詞(ci)條，當前(qian)頁面所展示的(de)(de)詞(ci)條介紹(shao)涉及宣傳內(nei)容屬于注冊用戶個人編輯行(xing)為，與【電話機】的(de)(de)所屬企業/所有人/主體無(wu)關，網(wang)站不完全保證內(nei)容信息的(de)(de)準(zhun)確性(xing)、真(zhen)實性(xing)，也不代表本站立(li)場，各項(xiang)數據信息存在更(geng)新不及時(shi)的(de)(de)情況，僅(jin)供參考，請(qing)以官方發布(bu)為準(zhun)。如(ru)果頁面內(nei)容與實際情況不符，可點擊“反(fan)饋”在線向(xiang)網(wang)站提(ti)出修改，網(wang)站將(jiang)核實后進行(xing)更(geng)正。
反(fan)饋
