System information

WellGate 3804 User Manual

4. Disconnect Tone Configuration

This application note is going to describe the procedures of configuring the

disconnect tone on WellGate 3804 FXO gateway in order to release LINE ports of

WellGate 3804 after PSTN/PBX caller party is hung up.

4.1 What is Disconnect Tone

A caller make a telephone call to Gateway from PSTN side, WellGate 3804 will

answer the call automatically. If the IP side of other VoIP devices do not answer

the call and the caller hang up the call, the PSTN/PBX will give Gateway a

disconnect tone automatically. Or, both devices are installed with WellGate 3804

and connect to local PSTN. If both parties are in talk mode, one side hang up the

call the WellGate has to recognize the disconnect tone from local PSTN. The

WellGate 3804 gateway will recognize this disconnect tone and release the LINE

port with the pre-defined busy tone or reorder tone from WellGate 3804 tone table.

If the other VoIP device of IP side hangs up the phone, the gateway will release

the LINE port automatically without analyzing disconnect tone from PSTN/PBX.

There are three parameters received from PSTN/PBX.

- High level frequency and Low level frequency

- Tone Cadence (ON/OFF intervals)

- Tone level

These parameters have to be properly configured to WellGate 3804 in order to

recognize disconnect tone correctly. Each different PSTN/PBX have different

parameters. So, WellGate 3804 has to configure tone table when LINE port

connect to different PSTN/PBX.

IP-

Network

PSTN or

PBX

WellGate

3804

Other VoIP

devices

IP Side PSTN side

Caller