OBI110: Disconnect Tone Pattern
malomyasa:
Thank you very much!
OK.
Then second question: if 10 = "duration of 10seconds", then why my OBI disconnects the line after first beep in busy signal?
PS: If DetectDisconnectTone in disable state, then OBI never disconnects from the line automatically.
ianobi:
The tone pattern is confusing. I believe the OBi110 will disconnect as soon as it recognises a valid disconnect tone of any duration. Not all countries have the same disconnect tone. For example I live in the UK where the disconnect tone is 400Hz at -30dBm for 3 seconds.
All that is probable not relevant. There are all those other methods of PSTN Disconnect Detection. Your OBi110 may well be seeing a CPC signal from your local telephone exchange. CPC will be a short drop in line voltage to signal that the called party has hung up. In the US this is around 450ms, where I live it can be as low as 90ms.
If you live in the US, then the default settings should be ok for you. If you live anywhere else, then local PSTN signals may be different.
malomyasa:
I switched off all other detectors in "PSTN Disconnect Detection": DetectCPC, DetectPolarityReversal and DetectFarEndLongSilence. And only if DetectDisconnectTone enabled, then OBI disconnects from the line after first beep in busy signal. If DetectDisconnectTone disabled - never disconnects from line. And my problem exist only if DetectDisconnectTone enabled.
How change duration of detect busy signal?
ianobi:
It seems that you have done all of the logical testing that can be done! I'm not sure why your OBi110 is so sensitive to the disconnect tone. I cannot test with my OBi110 as the tones are different where I live. Please confirm which country you live in, it might be relevant.
It is hard to imagine that the OBi is receiving a false disconnect tone in the middle of a call. A mix of 480Hz and 620Hz would be hard to simulate with the human voice.
Quote
If DetectDisconnectTone disabled - never disconnects from line.
Is this the case even if you hang up?
As DetectDisconnectTone does not seem to working well for you, then maybe you should try disabling it and enabling DetectCPC.
malomyasa:
Quote from: ianobi on February 20, 2015, 07:35:52 am
It is hard to imagine that the OBi is receiving a false disconnect tone in the middle of a call. A mix of 480Hz and 620Hz would be hard to simulate with the human voice.
I'm sorry that I misled you in my first message.
String "480-30,620-30;10;(.25+.25)" - this is OBI's default parameter - has been used only for example.
In really:
1) OBI110 configured as FXO-gateway for SIP-PBX.
2) OBI's LINE-port is connected to local line of our PBX in office.
3) DisconnectTonePattern = 425-30;10;(.25+.25)
4) PBX in our office can only generate the busy tone to local lines and don't supports CPC or reversing of polarity on local lines.
After some experiments I found: second (30) and third (10) numbers of DisconnectTonePattern may be any and don't affect to detecting busy signal. It was reason of my first question.
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