雖然雙絞(jiao)(jiao)線(xian)(xian)主要(yao)是用來傳(chuan)(chuan)(chuan)輸(shu)(shu)模擬聲音(yin)信(xin)息(xi)(xi)的(de),但同樣適用于數字信(xin)號(hao)的(de)傳(chuan)(chuan)(chuan)輸(shu)(shu),特(te)別適用于較(jiao)短距離(li)的(de)信(xin)息(xi)(xi)傳(chuan)(chuan)(chuan)輸(shu)(shu)。在傳(chuan)(chuan)(chuan)輸(shu)(shu)期間,信(xin)號(hao)的(de)衰減比較(jiao)大,并(bing)且產(chan)生波形(xing)畸變(bian)。采(cai)用雙絞(jiao)(jiao)線(xian)(xian)的(de)局域(yu)網的(de)帶寬取決于所用導線(xian)(xian)的(de)質量(liang)、長度及(ji)傳(chuan)(chuan)(chuan)輸(shu)(shu)技術。只要(yao)精心選擇和安(an)裝雙絞(jiao)(jiao)線(xian)(xian),就(jiu)可(ke)以在有限距離(li)內達到每秒(miao)幾百萬位(wei)的(de)可(ke)靠傳(chuan)(chuan)(chuan)輸(shu)(shu)率(lv)。當(dang)距離(li)很短,并(bing)且采(cai)用特(te)殊(shu)的(de)電子傳(chuan)(chuan)(chuan)輸(shu)(shu)技術時(shi),傳(chuan)(chuan)(chuan)輸(shu)(shu)率(lv)可(ke)達100Mbps～155Mbps。由于利用雙絞(jiao)(jiao)線(xian)(xian)傳(chuan)(chuan)(chuan)輸(shu)(shu)信(xin)息(xi)(xi)時(shi)要(yao)向周圍(wei)幅射,信(xin)息(xi)(xi)很容易被竊聽,因此(ci)要(yao)花(hua)費額外的(de)代價加以屏蔽。

　　屏(ping)蔽雙(shuang)絞(jiao)(jiao)線電(dian)(dian)纜(lan)的(de)(de)(de)外層由鋁泊包裹,以(yi)減小幅射(she),但(dan)并不能完(wan)全消除輻射(she)。屏(ping)蔽雙(shuang)絞(jiao)(jiao)線價(jia)格相對較高,安(an)裝時要比非(fei)屏(ping)蔽雙(shuang)絞(jiao)(jiao)線電(dian)(dian)纜(lan)困難。類似于同軸電(dian)(dian)纜(lan),它必須配有支持屏(ping)蔽功能的(de)(de)(de)特殊連結器和相應的(de)(de)(de)安(an)裝技術(shu)。但(dan)它有較高的(de)(de)(de)傳輸速率,100米內可達(da)到(dao)155Mbps。

　　非屏蔽(bi)雙絞(jiao)線電纜(lan)具有以(yi)(yi)下優點: (1)無(wu)屏蔽(bi)外套,直徑小(xiao),節省所占用的(de)空間; (2)重量輕(qing)、易彎(wan)曲、易安裝; (3)將(jiang)串擾減至最小(xiao)或加以(yi)(yi)消除; (4)具有阻燃性; (5)具有獨立性和靈活性,適用于結構(gou)化綜合布線。

　　EIA/TIA為(wei)雙絞線電(dian)(dian)纜(lan)(lan)(lan)定(ding)義了五種(zhong)不同(tong)質量的(de)(de)型號(hao)。計算機網(wang)絡綜合布線使用(yong)(yong)第三、四(si)、五類(lei)(lei)。這五種(zhong)型號(hao)如下：第一類(lei)(lei)：主(zhu)(zhu)要(yao)用(yong)(yong)于(yu)(yu)(yu)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)語(yu)音(yin)(yin)(一類(lei)(lei)標(biao)準主(zhu)(zhu)要(yao)用(yong)(yong)于(yu)(yu)(yu)八十年(nian)代(dai)初之前的(de)(de)電(dian)(dian)話線纜(lan)(lan)(lan))，不用(yong)(yong)于(yu)(yu)(yu)數(shu)據(ju)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)。第二類(lei)(lei)：傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)頻率(lv)(lv)為(wei)1MHz，用(yong)(yong)于(yu)(yu)(yu)語(yu)音(yin)(yin)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)和最(zui)(zui)高(gao)(gao)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)速率(lv)(lv)4Mbps的(de)(de)數(shu)據(ju)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)，常見于(yu)(yu)(yu)使用(yong)(yong)4Mbps規范令牌(pai)傳(chuan)(chuan)(chuan)遞協議的(de)(de)舊的(de)(de)令牌(pai)網(wang)。第三類(lei)(lei):指目前在ANSI和EIA/TIA568標(biao)準中指定(ding)的(de)(de)電(dian)(dian)纜(lan)(lan)(lan)。該(gai)電(dian)(dian)纜(lan)(lan)(lan)的(de)(de)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)頻率(lv)(lv)為(wei)16MHz,用(yong)(yong)于(yu)(yu)(yu)語(yu)音(yin)(yin)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)及(ji)最(zui)(zui)高(gao)(gao)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)速率(lv)(lv)為(wei)10Mbps的(de)(de)數(shu)據(ju)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)，主(zhu)(zhu)要(yao)用(yong)(yong)于(yu)(yu)(yu)10base-T。第四(si)類(lei)(lei):該(gai)類(lei)(lei)電(dian)(dian)纜(lan)(lan)(lan)的(de)(de)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)頻率(lv)(lv)為(wei)20MHz,用(yong)(yong)于(yu)(yu)(yu)語(yu)音(yin)(yin)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)和最(zui)(zui)高(gao)(gao)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)速率(lv)(lv)16Mbps的(de)(de)數(shu)據(ju)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)，主(zhu)(zhu)要(yao)用(yong)(yong)于(yu)(yu)(yu)基于(yu)(yu)(yu)令牌(pai)的(de)(de)局域網(wang)和10base-T/100base-T。第五類(lei)(lei):該(gai)類(lei)(lei)電(dian)(dian)纜(lan)(lan)(lan)增加了繞線密(mi)度,外(wai)套一種(zhong)高(gao)(gao)質量的(de)(de)絕緣材料,傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)頻率(lv)(lv)為(wei)100MHz,用(yong)(yong)于(yu)(yu)(yu)語(yu)音(yin)(yin)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)和最(zui)(zui)高(gao)(gao)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)速率(lv)(lv)為(wei)100Mbps的(de)(de)數(shu)據(ju)傳(chuan)(chuan)(chuan)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)，主(zhu)(zhu)要(yao)用(yong)(yong)于(yu)(yu)(yu)100base-T和10base-T網(wang)絡，這是(shi)最(zui)(zui)常用(yong)(yong)的(de)(de)以(yi)太(tai)網(wang)電(dian)(dian)纜(lan)(lan)(lan)。

　　雙(shuang)絞(jiao)線(xian)分(fen)為(wei)屏(ping)蔽(bi)雙(shuang)絞(jiao)線(xian)與非屏(ping)蔽(bi)雙(shuang)絞(jiao)線(xian)兩大類(lei)。在(zai)這(zhe)兩大類(lei)中(zhong)又分(fen)100歐(ou)姆電(dian)纜(lan)(lan)、雙(shuang)體電(dian)纜(lan)(lan)、大對數電(dian)纜(lan)(lan)、150歐(ou)姆屏(ping)蔽(bi)電(dian)纜(lan)(lan)。