Question: Standard Answering Machine Not Allowing For Messages After Greeting
chilirock:
Thanks for the replies. I'm am struggling with the assessment that the issue doesn't have anything to do with the Obi. I can directly correlate the issue to the firmware release version. Recent releases up to and including 5491 worked fine, meaning the greeting plays fine and the callers can leave messages. Releases after 5491 and up to and including 5657 don't work, meaning the greeting plays fine but the callers cannot leave messages. As soon as I revert back to 5491 from any release after 5491, messages can be received without issue.
I wonder if the issue has something to do with the Obi detecting an end of call, or treating it like a fax call. The intermittent tone that I hear after the greeting is played sounds like one a fax machine would play while it waits for the fax on the other end to start the communication link. Looking through the admin guide, I see there are some line settings that detect end of calls, eg. DetectCPC, DetectDisconnectTone, etc. I might try turning some of these on/off to see if they make a difference.
SteveInWA:
Correlation is not causation.
We've already explained that, as far as the OBi is concerned, someone or something answered the call. Turn off the answering machine. Call the number from some other phone and let it ring at least 4 times. Answer the call yourself. Can you have a two-way conversation with the other party? If so, then there is nothing wrong with the OBi settings.
If you let the answering machine grab the call, then whatever happens after that is up to the answering machine that answered that call. If the answering machine can't do its job, then either fix the answering machine (go find out exactly what those beeps mean), or get rid of that 1980s technology and use voicemail.
chilirock:
You are correct, causation and correlation are different. Upgrading to firmware to 5562 causes a tone to be played on the line and prevents callers from leaving messages. I noticed in WelshPaul's release notes for 5562 here: https://www.ukvoipforums.com/viewtopic.php?f=25&t=987 a new feature added called "FaxDetectionMethod now supports CNG or V.21 preamble". It seems that the fax detection method was changed in that release. I suspect that's what is causing the issue.
If you would consider another question, is there a way to disable fax detection in the Obi settings? I don't ever expect to receive faxes through the Obi ATA since I don't have a fax machine. If there was a way to disable fax detection altogether, I could try that to see if it makes a difference. Thanks again for your help.
SteveInWA:
WHY won't you perform the diagnostic test I described?
If the caller does, in fact, hear a 0.5 second, 1100Hz tone, followed by 3 seconds of silence, followed by another tone, , and so on, then that is the fax CNG tone sent by the device that is placing the call to the OBi's phone number. It is telling the caller that a fax machine is calling. Then, the fax machine emits the ANS tone, at 2100Hz. I seriously doubt that your Panasonic phone/answering device would emit those tones.
It would cause havoc. You have some sort of fax machine connected to the same telephone line as the Panasonic phones. It could be a HP, Canon, Epson or Brother all-in-one, or an actual fax machine, or even a PC with a fax modem.
Enter 1100 and 2100 into this website to hear the tones: http://onlinetonegenerator.com/
Find the problem. It is not inside the OBi.
Reference: http://what-when-how.com/voip/fax-and-modem-tones-basics-voip/
Konrad:
Dear chilirock you saved my life, I had the same problem, I had no idea what happened, thanks to your advice to return to "5491" everything returned to normal.
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