YC-B digital indication single page system: on the based of A type, it has the digital indication function to indicate the several calling order, bed no, time, calendar, function indication, automatically examination, scan, door lamp and also can have the corridor indication screen.  

Type and function:
Main component: 1. main phone      2. extension  

Option: 1. emergency extension     2. corridor indication screen     

Remark: all the types can have the emergency extension and purchase more extension calling wires (extension options)  

Functions: 1、Unending calling: whenever if there is a call, it can be connected.

2、Calling storage: when the extension calls the main phone, if the main phone has no answer or is working, the main phone will automatically store the extension no and indicate.

3、Main phones multiple function indication: main phone can indicate the calling order, bed no, time, calendar and LED.

4、Clock function: it can show the time and the calendar. 

5、Scan function: it can check up the room lamp setup and memo setup.

6、Automatically examination function: exam the system automatically.

7、Emergency calling: when the emergency extension calls, all the extensions can be paused.

8、Corridor indication screen: indicate the calling situation of the extension in time. When there is no calling, it indicates the time.

9、Easy installation: main phone and all the extensions, corridor indication screen just use the two normal soft wires, no polarity, parallel connection.  

I type corridor indication screen	II type corridor indication screen
I type corridor indication screen with clock	II type corridor indication screen with clock
Outer installed extension	Inner installed extension