广东厂家直供消防壁挂二总电话主机
【已经过期】：请登录重发或删除过期商品

详细信息

1,20门总线电话，布线只需二根且不分极性

2,主分互叫；分机摘机即通话，主机显号
3,可三方通话
4,通话时自动启动数字录音

2-Bus Control Telephone Panel(Wall-mounted structure)
1, Only a twisted-pair wire without polarity is needed.
2, A total of 20 extensions can be provided for the main phone.
3, Each extension can call the main phone without dialing. And the main phonecan call any of the fitted extension too. What’s more, the extension numberdisplays when it is calling.
4,The systems can start digital recording when communicating.