[hylafax-users] DTMF Detection Followup

["John Dell'Aera" <dellaera@xxxxxxxxxxx>]

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