telephone entry doorphone system 大门电话对讲系统 ; 大门
video doorphone system 可视对讲系统
Black-white video doorphone system 黑白可视对讲系统
Doorphone Call 门电话呼叫
Doorphone Cingl 门电话呼叫
WIRELESS intercom DOORPHONE 无线对讲门铃
Wireless Doorphone GP-MA601 无线对讲门铃GP
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The hardware of the system is built on the layout network of the doorphone system, and CAN BUS is used as the trunk line of communication to improve the real time performance and reliability.
系统硬件利用楼宇访客系统的布线网络，通信干线采用CAN总线，以提高通信的实时性和可靠性。
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