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Re: [hylafax-users] help to solve T.30 T1 timeout
On 2005.02.14 10:09 Alexandre Biancalana wrote:
Hi Lee and List !
I set the SessionTracing to 0xFFF and get the following log off an
transaction that the problem ocurred:
Feb 14 15:58:49.96: [10753]: <-- [9:AT+FRH=3\r]
Feb 14 15:58:53.07: [10753]: --> [0:]
Feb 14 15:58:53.07: [10753]: MODEM <Empty line>
Feb 14 15:58:53.07: [10753]: MODEM TIMEOUT: waiting for v.21 carrier
Feb 14 15:58:53.07: [10753]: <-- data [1]
Feb 14 15:58:53.28: [10753]: MODEM TIMEOUT: reading line from modem
Feb 14 15:58:53.28: [10753]: MODEM <Timeout>
Feb 14 15:58:53.28: [10753]: DELAY 8500 ms
Feb 14 15:59:01.79: [10753]: <-- [9:AT+FTH=3\r]
Feb 14 15:59:01.79: [10753]: --> [2:OK]
The fact that the sender did not respond outright to your prologue
isn't unusual. Sometimes senders do not respond right away and it
takes a cycle or two more.
Notice, however, that there was no "OK" response to <CAN> issued from
the modem (the "<-- data [1]") which was supposed to take it back to
command-mode (resulting in an OK), but it didn't, and the OK response
didn't come until later, after the next AT command. This lack of
response to <CAN> is pretty much a violation of T.31, so you should
probably look to your modem manufacturer for a fix there, but HylaFAX
does have a workaround:
Class1RecvAbortOK: 0
in your modem config file.
Feb 14 15:59:01.79: [10753]: DELAY 8500 ms
By this point all hope is lost, surely.
Feb 14 15:59:12.83: [10753]: <-- [9:AT+FRH=3\r]
Feb 14 15:59:15.94: [10753]: --> [0:]
Feb 14 15:59:15.94: [10753]: MODEM <Empty line>
Feb 14 15:59:15.94: [10753]: MODEM TIMEOUT: waiting for v.21 carrier
Feb 14 15:59:15.94: [10753]: <-- data [1]
Feb 14 15:59:16.15: [10753]: MODEM TIMEOUT: reading line from modem
Feb 14 15:59:16.15: [10753]: MODEM <Timeout>
Feb 14 15:59:16.15: [10753]: DELAY 8500 ms
Feb 14 15:59:24.66: [10753]: <-- [9:AT+FTH=3\r]
Feb 14 15:59:24.66: [10753]: --> [2:OK]
You see, it's a chronic problem.
Lee.
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