They have proven especially useful in wide area network (WAN) installations where long-distance underground or outdoor cable runs are required and also in office buildings where a high volume of communication traffic is common.
Ha egosila na ọ bara uru karịsịa na mpaghara netwọk (WAN) ebe a na-achọ ebe dị anya ma ọ bụ n'èzí n'igwe n'èzí nakwa n'ọfịs ụlọ ọrụ ebe nnukwu ọkwa nke okporo ụzọ na-ekwukarị.