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Telephone signaling interface : ウィキペディア英語版 | Telephone signaling interface
There are many interface standards between analog telephone central office equipment and customer-premises equipment. Single voice paths generally include analog audio connections, either a two-wire circuit or four-wire circuit plus signaling paths to indicate call progress and status information, such as ringing, answer supervision, etc. Some of the known interface types are * FXO foreign exchange office * FXS foreign exchange station * DPO dial pulse originate * DPT dial pulse terminate * E and M signaling * KS Kewlstart * Loop start * Ground start
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Telephone signaling interface」の詳細全文を読む
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