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aaronfitz
Premium
join:2004-03-06
Cedar Rapids, IA
| [Broadvox Direct] DTMF tones.. I'll be honest. I used to think all of you that were hearing DTMF tones while on the phone with women were just having your chains pulled. 
Now I'm having this issue myself. It only happens with one girl, but it's extremely annoying. I am using G.711 on my line (one of the main reasons I switched off of Packet8). I submitted a ticket to technical support about the tones, figuring they'd be able to turn down a DTMF sensitivity setting or something on my adapter. I got a response today about it, with the tech saying he changed my codec to G.729 and it should fix it.
Now, a question for you all: did he take the easy way out? Is there any other way to fix the DTMF? The G.711 makes my life a lot better, I find myself saying "what?" on the phone less than I did with Packet8.
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"Time is in abundance for procrastinators," So you should become one like me! I claim no responsibility if anyone is unable to understand my twisted, sarcastic sense of humor... | |
|  | jgwilliams
Premium,VIP
join:2003-09-16
Chesterland, OH
clubs:
| The CODEC actually has nothing to do with this issue. Other devices have been known for this problem, some of which on a persistent basis. The Broadvox DTA to the best of my knowledge has not been accused of this in the past, however anything is possible.
The reason that the CODEC can not affect this situation is that DTMF tones are sent out-of-band and therefore not a part of the voice path. If they were part of the voice path (in-band) then nobody using a compressed codec would be able to interact with ACD systems such as those interfaces (press 1 for this 2 for that).
I do not know if a 'sensitivity' setting for something like this is present in our device however I have forwarded the report to our interop people.
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Jeffery Williams
CIO
Broadvox, Llc
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aaronfitz
Premium
join:2004-03-06
Cedar Rapids, IA | Re: [Broadvox Direct] DTMF tones.. I figured it didn't. Thanks Jeff 
I'll figure out a way to get her to keep the pitch of her voice down for now. Hmm.. | |
| | | jgwilliams
Premium,VIP
join:2003-09-16
Chesterland, OH
clubs: | Re: [Broadvox Direct] DTMF tones.. lol
Well you could.
Never mind.  | |
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daly
@mc.videot | Re: [Broadvox Direct] DTMF tones.. jf, can you help me to resolve ticket number 00102527 posted today to broadvox for the caller id outgoing to canada. | |
| | | | | jgwilliams
Premium,VIP
join:2003-09-16
Chesterland, OH
clubs:
| Re: [Broadvox Direct] DTMF tones.. I am sorry, I am not a support representative, nor am I here to provide Broadvox support. I dedicate some of my time to entertain discussions regarding VoIP, technology, and generic Broadvox related questions from time to time.
I don't want to come across as unhelpful however I simply can not become involved with technical support related issues. For one I am not qualified, and I simply don't have the time. I presently work nearly 100 hours per week, and spend a great deal of time here.
Whenever a problem comes about, and in particular software related (That is my area of expertise) I generally read and react. You will notice that I seldom become involved in those conversations unless there is a widespread issue and I need to gain additional information.
If you contact technical support I am sure that they can address your questions. If not you can always request a supervisor in that area.
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Jeffery Williams
CIO
Broadvox, Llc
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aaronfitz
Premium
join:2004-03-06
Cedar Rapids, IA
2 edits | Re: [Broadvox Direct] DTMF tones.. Hey Jeff, you thought it was funny before? Read this
Every time it beeps now, she hears it. This makes her squeal "stop hitting buttons!", which, of course, makes it beep again. Then she goes into a high pitched yelling about it, during which I'm convinced the DTMF tones actually are working as a profanity filter
You might want to ignore the rest of the post, it's babbling that results from me not sleeping at 2AM
I called the automated weather line here a few minutes ago, and it started beeping when the lady on there talks (well, the recording of her talking plays). Seems to be getting more touchy. Is it possible this is happening at the PSTN gateway here? My inbound caller ID is no longer working- they're all coming up as anonymous. Even says so on the portal. But then again I had a ticket about outgoing caller ID the other day, the support guy might have broken the incoming while looking into the outgoing. Who knows? I opened a ticket about the incoming caller ID. Just thought I'd mention it in the slight chance they're related.
EDIT: I wouldn't have brought that up, but I find it weird that if the adapter were regenerating DTMF tones it would send them out on her side, too. I had asked her before if she heard the tones, and she said no. 
Now that I've sufficiently rambled in my half-asleep state, I'm going to bed.
--
"Time is in abundance for procrastinators," So you should become one like me!
I claim no responsibility if anyone is unable to understand my twisted, sarcastic sense of humor... | |
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aaronfitz
Premium
join:2004-03-06
Cedar Rapids, IA
| Re: [Broadvox Direct] DTMF tones..... said by usa2k  :HEY EDIT: If this is the far end . . . it would be the phone switch, of their phone company??? I was just taking blind stabs. It just doesn't make sense to me why a generated tone would be sent back to the party that supposedly hit the button as well.
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"Time is in abundance for procrastinators," So you should become one like me! I claim no responsibility if anyone is unable to understand my twisted, sarcastic sense of humor... | |
| jgwilliams
Premium,VIP
join:2003-09-16
Chesterland, OH
clubs:
| DTMF tones are ALWAYS out-of-band. This can be set by a VoIP carrier, on some switches anyway. To that end they are one or the other, not dynamically based upon CODEC.
DTMF tones are generated by the CPE and that is why you hear it on one end. The device will interpret sound from In-Band transmission, and then regenerate that sound as exact DTMF within the CPE.
Why you ask? Well legacy PSTN does not have the same communication concept. There are channels rather than bands, and because your voice conversation does not traverse the switch on th VoIP provider side the switch can not 'listen' to the channels. The end result is that the CPE will listen to the audio channel and regenerate the tone when heard.
Now you are wondering why would the CPE regenerate the DTMF if it can be heard on the in-band audio spectrum? Well because the other devices like auto attendants and such are picky about what they hear to understand the various digits. Even with G711 which is a non-compressed 'loss-less' CODEC could have "SOME" loss even if you do not hear it. It is this slight loss that can change the tonality of the DTMF and thereby make communicating with automated systems spotty. The regeneration of these tones locally by the CPE insure an exact duplication of the digits pressed. These are carrier out-of-band to insure that they are not 'stepped on'.
While I am not technically certain I believe you can apply the same principal to modem communication. With G711 you can connect with the right connection (your broadband, the VoIP carrier). The least little variation will disconnect you or slow the connection to a crawl as a result of error correction.
Things like T.38 work as the protocol is designed to take advantage of the rule set that fax machines follow. A fax transmission can be paused, you can resend packets more than with a standard modem. There are other factors here but the point is that T.38 will handle error correction and 'manage' the transmission of a fax rather than straight G711. Think of it as a mediator, the protocol listens to instructions from the receiving fax, or sends instructions to the sending fax; give me more data, say that again, etc...
We are looking into the sensitivity for this DTMF translation, not sure yet if there is something that can be done.
--
Jeffery Williams
CIO
Broadvox, Llc
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Re: [Broadvox Direct] DTMF tones.....