Each ZDL-12AC interphone extension has a wall-mounted, easy to wall install,
Using the screws fix the wall-mounted on the wall, Aligning the wall-mounted on
 interphone extension appropriate slot, and  Pressing gently down the interphone
extension to fix.

OPERATION INSTRUCTION
1. Unlocking  and intercom function
The visitor press the "call" button on the door station, all the indoor phone
will ring, Arbitrarily an extension picked up the receiver can do a dual-way
 intercom, more than extensions can do Multi-intercom , make sure the visitors,
 pressing extension No. 1 button unlock. (indoor phone group calls switch "P"
must be set  "open" state)

2. Internal intercom function
Extension: 1, 2, 3, 4, 5, 6, 7, 8 ,9, 10, 11, 12 can call and do an intercom each other,
When you pick up the receiver to press extension number ,the other party answer.
It can do dual-way intercom.

3. PG Broadcast function.
Picking up the receiver, Pressing " pg "key long time, It can do broadcast
function with all the extension. (The group calling switch "p"on the back
of extension must be set at "open" state)

4. Group calling functions
Picking up the receiver and press the groupcall number on the extension, when
the other party answer , It can do Multi-way intercom.

5. Amplifying  function 
Each extension has a inbuilt audio to enlarge circuit, It can connect a loudspeaker
from outside.(Many extensions connect with high- pitched loudspeakers in the
same environmental area, the calling maybe Interference)

SPECIFICATION

Power sourceDC 12V / 1A

Current consumption: 100mA

Effective distance: 100M/0.5mm ;  300M/0.75mm;  500M/1.0mm

Wiring: 4common wires