OTDR測(ce)試(shi)(shi)延(yan)長(chang)線(xian)與光(guang)纖跳(tiao)線(xian)類似，光(guang)纖中(zhong)(zhong)部沒有任何(he)熔接頭，一般放(fang)置在(zai)盒式結構中(zhong)(zhong)，體積小，重(zhong)量輕，攜(xie)帶方便。在(zai)光(guang)纖測(ce)試(shi)(shi)過(guo)程中(zhong)(zhong)，OTDR測(ce)試(shi)(shi)延(yan)長(chang)線(xian)主要用來(lai)彌補OTDR測(ce)試(shi)(shi)盲區。
