PSTN lines stay active on hang up

[Simsek]

Hi,
I am from Germany. i have got same problem. I think I have got the solution.
Grandstream HT488
FW: 1.0.3.86

1) Download this program http://www.audacity.de
2) Record this sound for hung up
3) You can see the ms between break and sound.
For example
Tuuuuuuuut = 240 ms
No tone = 240 ms

HT 488 FXO configuration:

PSTN AC Termination : Global complex impedance
Enable PSTN Disconnect Tone Detection : YES
PSTN Disconnect Tone : Frequency f1 440 hz / f2 440 Hz
PSTN Disconnect Cadence: Coice 1: on 240 Off 240
PSTN Silence Timeout: 60 ms
Enable Current Disconnect : YES
If Current disconnect enable, use threshold: 50

And I have got it. HT488 hung up. It function very well
Tuut…. Tuut…. Tuut = hung up.
I think, it is the solution. My English is not so very well. I think you can understand me.
--THANKS--

 

[pishkom]

Please note that some countries use Current disconnect and some countries use bz tone detection for disconcerting the PSTN line. The US is using current disconnect and most of the other countries are using bz tone detection.

Also the disconcert signal is a simple wing that comes from the CO and it is dependent on line length and impedance which can add some time to the line settling process and therefore increase the wink time by a bit. Also it is good to know that this wink is actually presented in the offhook settling of the line. So if you are using Grandstream gxw410x and you are trying to make outbound calls on a 1 stage dialing with the wait for dial tone option disabled then you need to be careful because this line settling wink can eat up your first digits and you’ll be dialing short numbers. In this case its good to have the current threshold set a little higher or

 

[miraportuga]

Digital recepcionist has this issue, yes, picks up the call and after the call ends it wont end the call. This can be solved thoug by setting up the right disconect tone for your PSTN line. I know this works, i've been trying to make it work has well, but i didnt managed to find out what was the disconection tone for me, tried a few without sucess. Even asking to my PSTN provider, they dont know what it is, or more probably i talked to the wrong person.... :|

Cheers and good luck