[hylafax-users] MODEM <Empty line>

I'm currently using hylafax-4.2.1 on a Linux RedHat 9.0. My modem is a U.S. Robotics 56K FAX EXT V4.11.2 (as shown at /var/log/messages). I had an old server with the same modem attached with hylafax-4.1.8 and Linux RedHat 9.0.

At first, I tested hylafax sending a test fax from a Macintosh PowerBook G3 Series (Wallstreet). It has an integrated 56K modem. Everything was fine.

The problem is that sometimes, when a customer sends a fax, there are errors and the fax is not recieved. The following is part of the log:

Feb 14 13:31:33.80: [ 3149]: SESSION BEGIN 000000024 5114457732
Feb 14 13:31:33.80: [ 3149]: HylaFAX (tm) Version 4.2.1
Feb 14 13:31:33.80: [ 3149]: <-- [13:AT+FCLASS=1A\r]
Feb 14 13:31:39.09: [ 3149]: --> [7:CONNECT]
Feb 14 13:31:39.09: [ 3149]: ANSWER: FAX CONNECTION DEVICE '/dev/ttyS0'
Feb 14 13:31:39.09: [ 3149]: RECV FAX: begin
Feb 14 13:31:39.09: [ 3149]: <-- data [32]
Feb 14 13:31:39.09: [ 3149]: <-- data [2]
Feb 14 13:31:39.15: [ 3149]: --> [7:CONNECT]
Feb 14 13:31:39.15: [ 3149]: <-- data [23]
Feb 14 13:31:39.15: [ 3149]: <-- data [2]
Feb 14 13:31:39.87: [ 3149]: --> [7:CONNECT]
Feb 14 13:31:39.87: [ 3149]: <-- data [10]
Feb 14 13:31:39.87: [ 3149]: <-- data [2]
Feb 14 13:31:42.06: [ 3149]: --> [2:OK]
Feb 14 13:31:42.06: [ 3149]: <-- [9:AT+FRH=3\r]
Feb 14 13:31:45.16: [ 3149]: --> [0:]
Feb 14 13:31:45.16: [ 3149]: MODEM <Empty line>
Feb 14 13:31:45.16: [ 3149]: <-- data [1]
Feb 14 13:31:45.17: [ 3149]: --> [2:OK]
Feb 14 13:31:45.17: [ 3149]: DELAY 1500 ms
Feb 14 13:31:46.67: [ 3149]: <-- [9:AT+FTH=3\r]
Feb 14 13:31:46.71: [ 3149]: --> [7:CONNECT]
Feb 14 13:31:46.71: [ 3149]: <-- data [32]
Feb 14 13:31:46.71: [ 3149]: <-- data [2]
Feb 14 13:31:46.88: [ 3149]: --> [7:CONNECT]
Feb 14 13:31:46.88: [ 3149]: <-- data [23]
Feb 14 13:31:46.88: [ 3149]: <-- data [2]
Feb 14 13:31:47.60: [ 3149]: --> [7:CONNECT]
Feb 14 13:31:47.60: [ 3149]: <-- data [10]
Feb 14 13:31:47.60: [ 3149]: <-- data [2]
Feb 14 13:31:49.78: [ 3149]: --> [2:OK]
Feb 14 13:31:49.78: [ 3149]: <-- [9:AT+FRH=3\r]
Feb 14 13:31:52.88: [ 3149]: --> [0:]
Feb 14 13:31:52.88: [ 3149]: MODEM <Empty line>
Feb 14 13:31:52.88: [ 3149]: <-- data [1]
...

It repeats 4 more times and then:

Feb 14 13:32:23.76: [ 3149]: --> [0:]
Feb 14 13:32:23.76: [ 3149]: MODEM <Empty line>
Feb 14 13:32:23.76: [ 3149]: <-- data [1]
Feb 14 13:32:23.77: [ 3149]: --> [2:OK]
Feb 14 13:32:23.77: [ 3149]: RECV FAX: No answer (T.30 T1 timeout)
Feb 14 13:32:23.77: [ 3149]: RECV FAX: end
Feb 14 13:32:23.77: [ 3149]: SESSION END

Quite strange. I have a fax on the same line, an HP OfficeJet 5500 series all-in-one. It is supposed that this fax receives the faxes when hylafax cannot, but it only reports errors.

There's a log that shows the following and maybe it's part of the problem. Dunno.

Feb 15 14:31:13.17: [ 3069]: SESSION BEGIN 000000027 5114457732
Feb 15 14:31:13.17: [ 3069]: HylaFAX (tm) Version 4.2.1
Feb 15 14:31:13.17: [ 3069]: <-- [4:ATA\r]
Feb 15 14:31:30.06: [ 3069]: --> [4:+FDM]
Feb 15 14:31:30.06: [ 3069]: ANSWER: DATA CONNECTION
Feb 15 14:31:30.06: [ 3069]: runGetty::initgroups: Operation not permitted
Feb 15 14:31:30.06: [ 3069]: GETTY: START "/sbin/agetty -h ttyS0 dx_19200", pid 3739
Feb 15 14:31:40.12: [ 3069]: GETTY: exit status 0400
Feb 15 14:31:40.12: [ 3069]: SESSION END

I've googled for these errors and I found no problem solved :(

The big problem is that this error ocurred on my old server without any notice. I didn't even know that this was happening and almost half of the time this problem ocurred.

Could you please help me? If necessary, I can send more information like config, config.ttyS0 or some other configuration files.