Re: [hylafax-users] DTMF Detection Followup

[Neil Dugan <hylafax@xxxxxxxxxxxxxxxxxxxxxxxx>]

John Dell'Aera wrote:
> Hello
>
> I did the following experiment as a follow up to my previous experiment with cu and DTMF detection:
>
> I pressed fax start on my fax machine and waited for the long low frequency tone from my modem (AT+VTS=[200,200,500])
> Then I disconnected the fax machine cable from the fax machine and connected it to a touchtone phone and dialed 1234.
> I hung up the phone and reconnected the phone cable to the fax machine to let the fax transmission continue.
> I received the fax in the recvq directory. I dumped the variables collected from faxrcved:
>
> ######################################################################
> This indicates that the DTMF tones were read by faxgetty and passed to faxrcved.
> ######################################################################
> SENDER=**********
> DEVICE=modem
> CIDNUMBER=1234
> SUBADDR=
> CIDNAME=
> DESTINATION=
> CALLID=
>
>
>
> ######################################################################
> /var/log/syslog excerpt: This indicates that the DTMF tones were read by faxgetty.
> ######################################################################
> Oct 14 17:25:00 EfaxServ FaxGetty[6746]: MODEM INTEL CORPORATION 537EP/537EP  PRE-Release 2.70.95.0  - Jul 26 2005
> Oct 14 17:25:00 EfaxServ FaxGetty[6746]: <-- [5:ATM0\r]
> Oct 14 17:25:00 EfaxServ FaxGetty[6746]: --> [2:OK]
> Oct 14 17:25:00 EfaxServ FaxGetty[6746]: STATE CHANGE: RECEIVING -> RUNNING (timeout 30)
> Oct 14 17:25:00 EfaxServ FaxGetty[6746]: MODEM input buffering disabled
> Oct 14 17:25:00 EfaxServ FaxQueuer[6775]: FIFO RECV "+modem:RPcaf9c77f:ff"
> Oct 14 17:25:00 EfaxServ FaxQueuer[6775]: MODEM modem: READY, capabilities Pcaf9c77f:ff
> Oct 14 17:26:13 EfaxServ FaxGetty[6746]: STATE CHANGE: RUNNING -> LISTENING
> Oct 14 17:26:13 EfaxServ FaxQueuer[6775]: FIFO RECV "+modem:B"
> Oct 14 17:26:13 EfaxServ FaxQueuer[6775]: MODEM modem: BUSY
> Oct 14 17:26:13 EfaxServ FaxGetty[6746]: --> [4:RING]
> Oct 14 17:26:20 EfaxServ FaxGetty[6746]: --> [4:RING]
> Oct 14 17:26:20 EfaxServ FaxGetty[6746]: <-- [12:AT+FCLASS=8\r]
> Oct 14 17:26:20 EfaxServ FaxGetty[6746]: --> [2:OK]
> Oct 14 17:26:20 EfaxServ FaxGetty[6746]: <-- [9:AT+VLS=1\r]
> Oct 14 17:26:20 EfaxServ FaxGetty[6746]: --> [2:OK]
> Oct 14 17:26:20 EfaxServ FaxGetty[6746]: <-- [21:AT+VTS=[200,200,500]\r]
> Oct 14 17:26:25 EfaxServ FaxGetty[6746]: MODEM TIMEOUT: reading line from modem
> Oct 14 17:26:29 EfaxServ FaxGetty[6746]: MODEM HEARD DTMF: 1
> Oct 14 17:26:29 EfaxServ FaxGetty[6746]: MODEM HEARD DTMF: 2
> Oct 14 17:26:29 EfaxServ FaxGetty[6746]: MODEM HEARD DTMF: 3
> Oct 14 17:26:30 EfaxServ FaxGetty[6746]: MODEM HEARD DTMF: 4
> Oct 14 17:26:30 EfaxServ FaxGetty[6746]: ANSWER: Call ID 1 "1234"
> Oct 14 17:26:30 EfaxServ FaxGetty[6746]: STATE CHANGE: LISTENING -> ANSWERING
> Oct 14 17:26:30 EfaxServ FaxGetty[6746]: Apply CanonicalNumber rules to "+1.650.555.1212"
> Oct 14 17:26:30 EfaxServ FaxGetty[6746]: --> match rule "[^+0-9]+", result now "+1650.555.1212"
> Oct 14 17:26:30 EfaxServ FaxGetty[6746]: --> match rule "[^+0-9]+", result now "+1650555.1212"
> Oct 14 17:26:30 EfaxServ FaxGetty[6746]: --> match rule "[^+0-9]+", result now "+16505551212"
> Oct 14 17:26:30 EfaxServ FaxGetty[6746]: --> return result "+16505551212"
>
>
>
>
> This result tells me that the touchtone pad on my fax machines is disabled during a fax transmission.
> But that seems strange because I can tell that a lot of work went into HylaFax to support DTMF tone detection for routing.
> If the touchtone pad were truly disabled on many fax machines during a fax transmission DTMF detection support would 
> be virtually useless. And I assume that's not the case.
>
> So my question is what am I doing wrong that prevents me from sending/detecting  DTMF tones DIRECTLY FROM my fax machine?
> Thank tou.
> John 

If you put both the fax machine and the touch phone on the same line 
with a line splitter, you should be able to send with the fax machine, 
 listen on the phone (maybe disable its microphone) then use the 
phones number pad to do the extra tones and then hang the phone up. 
Leaving the fax machine to finish the fax.

Same when you have two phones on the same line and when a phone call 
is in progress, the other phone is mistakenly used to place a call. 
You hear the tones on the first phone.

Neil.







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