[hylafax-users] Ring detected without successful handshake

[Steven Kurylo <skurylo@xxxxxxxxxxxx>]

So far this month I've had 43 calls with the above error, all the logs 
look like

Mar 03 09:12:48.69: [ 5602]: SESSION BEGIN 00006369 XXXXXX
Mar 03 09:12:48.69: [ 5602]: HylaFAX (tm) Version 4.1.7
Mar 03 09:12:48.69: [ 5602]: <-- [19:AT+FCC=,,,,,0,,0;A\r]
Mar 03 09:13:37.49: [ 5602]: --> [7:+FHS:11]
Mar 03 09:13:37.49: [ 5602]: REMOTE HANGUP: No answer (T.30 T1 timeout) 
(code 11)
Mar 03 09:13:37.49: [ 5602]: ANSWER: Ring detected without successful 
handshake
Mar 03 09:13:37.49: [ 5602]: SESSION END

Looking at syslog the modem state before and after this missed call 
seems to be the same each time

Mar  3 12:47:30 fax FaxGetty[5602]: STATE CHANGE: ANSWERING -> RUNNING 
(timeout 30)
Mar  3 12:47:30 fax FaxGetty[5602]: MODEM input buffering disabled
Mar  3 12:48:06 fax FaxGetty[5602]: STATE CHANGE: RUNNING -> LISTENING
Mar  3 12:48:06 fax FaxGetty[5602]: MODEM input buffering enabled
Mar  3 12:48:07 fax FaxGetty[5602]: --> [4:RING]
Mar  3 12:48:07 fax FaxGetty[5602]: STATE CHANGE: LISTENING -> ANSWERING
Mar  3 12:48:07 fax FaxGetty[5602]: MODEM input buffering enabled
Mar  3 12:48:54 fax FaxGetty[5602]: ANSWER: Ring detected without 
successful handshake
Mar  3 12:48:54 fax FaxGetty[5602]: <-- [5:ATH0\r]
Mar  3 12:48:54 fax FaxGetty[5602]: --> [2:OK]
Mar  3 12:48:54 fax FaxGetty[5602]: MODEM set DTR OFF
Mar  3 12:48:55 fax FaxGetty[5602]: MODEM set DTR OFF
Mar  3 12:48:55 fax FaxGetty[5602]: DELAY 75 ms
Mar  3 12:48:55 fax FaxGetty[5602]: MODEM set DTR ON
Mar  3 12:48:55 fax FaxGetty[5602]: DELAY 2600 ms

This seems to be a normal behaviour: the fax is idle, receives a ring, 
produces the session log, and once done (in this case an error) starts 
initializing the modem again.  Am I missing something?  Where else can I 
look?  Previously this error has been quite rare, for the three days 
this month its happened more often than faxes we've properly received.  
THe modem is a MODEM MULTI-TECH SYSTEMS MT5634ZPX-PCI-U/1.32f in class 2.0.

We've also been getting a lot of No carrier detected message this month, 
which is the subject of my next email.

Thanks.

--
Steven Kurylo



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