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美国视讯公司（ＶＴＥＬ）会议电视设备在北京—新加坡国际ＩＳＤＮ成功运行１９９７年６月９日－１４日在新加坡举行的第四届亚洲电信展览会上，由邮电部和北京电信局提供参展的美国视讯公司（ＶＴＥＬ）生产的会议电视设备，成功地进行了北京—新加坡的国际ＩＳＤＮ视像...
VTEL Conference TV Equipment Successfully Operated in Beijing-Singapore International ISDN The United States of America (USA), exhibiting by the Ministry of Posts and Telecommunications and the Beijing Telecommunications Bureau, was held at the 4th AsiaTelecommunications Exhibition in Singapore on June 9-14, 1997. Videoconferencing company (VTEL) production of video conferencing equipment, the success of the Beijing-Singapore international ISDN video ...