There is a button under the receiver, called fork spring, which is the one that hangs up when pressed. Pat the fork spring (1 10 ms -800 ms) when turning the phone. After pressing the R key or the Transfer key, it is equivalent to keeping the incoming external line, and the incoming person will hear the system music at this time.

After you dial the extension number, you can hang up when you hear the other party's phone ring (if you are far away, listen to the voice waiting for the connection in the microphone). If you hear a busy signal, it means that the extension is on the phone, and you can take the fork back to the outside line.

What functions can be realized after installing the telephone extension system?

1, from 1 external line 16 extension, can be extended to any number of external lines and extensions. 2. It can be equipped with a dedicated telephone, a direct election desk and any ordinary telephone. Both dedicated telephone and ordinary telephone can be programmed, and all external lines and some internal lines of the system can be monitored through dedicated telephone.

3、? Off-hook directly to the outside line or dial 9. 4. Built-in automatic recording computer operator. Category 5 and 6 long-distance and special number restrictions. 6. Portable password, 7. Built-in caller ID function (you can still see the caller number after connecting the extension)?

8. Public address notification and transmission function. 9,2-4-bit elastic coding. (The extension number can be 1, 2,8 as the first digit) 10, and the external direct dial extension is busy, prompting to dial other numbers. 1 1, the external direct dial extension is not answered, prompting to dial other numbers. 12, including all ordinary functions of other program-controlled switches.