只要一位網絡電話客戶有加鎖的配置菜單在h.264, h263, h263-1998 編解碼器打可視電話,該解碼器是與阿斯泰里克斯IP程控交換機配合工作的 .
（請參考阿斯泰里克斯：Asterisk is a software implementation of a telephone private branch exchange (PBX); it was created in 1999 by Mark Spencer of Digium. Like any PBX, it allows attached telephones to make calls to one another, and to connect to other telephone services including the public switched telephone network (PSTN) and Voice over Internet Protocol (VoIP) services. Its name comes from the asterisk symbol, “*”.
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