A lab network access server is disclosed in accordance with an embodiment of the present invention. The lab network access server is coupled to a customer network server through a packet switching network. The customer modem device includes a customer modem device and is coupled to an end-user modem...http://www.google.com.tw/patents/US6898186?utm_source=gb-gplus-share專利 US6898186 - Modem pass through for remote testing
