Button Presses Not Registering in GV Voicemail
jra85:
Thanks again Steve! I'll verify the alarm still works. Understood on the reliability concerns of VoIP/GV with alarm systems, have read up on that in the past but have never had an issue with central station failing to respond when previously connected through Vonage, so I'm giving GV a chance before changing monitoring solutions.
Any insight why InBand would work for DTMF tones on outgoing calls except for GV Voicemail?
SteveInWA:
I have no idea. It should work with DTMF set to Auto.
Just a wild-ass guess that it's your Panasonic phone system. In-band DTMF is just sending the audio sounds generated by the touch-tone keypad on the phone, mixed in with the rest of the audio (your voice, background noise, etc.) It depends on having a high-quality audio stream to the other end, using the G.711 codec, with few dropouts and low jitter.
That's why I suggested trying a different telephone as a troubleshooting step.
Switching to RFC2833 is telling the network to interpret and then send the tones as separate RTP data packets, thus minimizing negative impacts from the network quality. As long as the ATA can interpret and encode the DTMF tones it "hears" over the analog interface, there is no issue sending the tones as encoded messages.
If you have trouble sleeping: https://www.ietf.org/rfc/rfc2833.txt
jra85:
Just to update this thread, I have another Obi200 connected to GV with another Panasonic cordless phone (different model from the phone mentioned in the original post), and the communicating base for this phone is connected directly to the Obi rather than to the house wiring. If I enable the "Use This Service for a Security Alarm Line" option in the settings for SP1 (the GV account), just as I had for the other Obi device that wouldn't respond to button presses in GV Voicemail, it automatically changes the DTMF Method to InBand in the Obi Expert configuration. Upon doing this, GV Voicemail prompts fail to respond to button presses, same as the other Obi setup.
If I disable the "Use This Service for a Security Alarm Line" option, the DTMF method is automatically set to Auto and GV Voicemail correctly responds to button presses with this setting. Which method does the "Auto" setting actually utilize? Does it intelligently pick one based on the service provider being used? Does it always just use RFC2833?
I guess it comes down to the Panasonic phones failing to properly communicate with GV Voicemail when using an InBand DTMF Method, even though it seems to work with other prompt-driven systems (though I have discovered one other system that fails to respond to button presses over the last week). Or maybe it's due to Obi's (or GV's?) handling InBand tones?
EDIT: Did a little searching and found this thread. Looks like this isn't a new problem:
https://www.obitalk.com/forum/index.php?topic=6281.0
SteveInWA:
I consider the "use for security alarm" setting to mean: use the OBi only for an alarm, and not for regular GV use. Obihai made some undocumented changes to support that feature, and I have no idea what they are.
I seem to recall a setting on Panasonic cordless phones that does something to the DTMF method. Sorry to be so vague, but I don't use those phones anymore.
Seriously: for a more reliable security communicator, use a cellular/IP communicator, not an OBi.
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