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Re: [hylafax-users] COMREC Errors with MultiTech MT1932ZDX Modems
Brian S. Drexler wrote:
Greetings to all. I’ve been having a problem with my HylaFAX solution
that is growing more and more irritating. I have been getting COMREC
errors on more and more incoming faxes. I will receive two out of
three pages and then it seems to die. I can’t figure out what’s going
on. After searching the internet for the last two days, the best thing
that I have come up with to try is upgrading the firmware of my modems
(which I can’t seem to find a firmware update because they are so
old). I contacted Multi-tech out of desperation but I doubt I will get
a whole lot of help from them. Does anyone have any idea what I could
do to help this problem? I have no problem with buying new modems, but
that can get a bit pricey (especially since I’m using nine of these).
But I won’t rule that out as an option. Any help or suggestions
(including modem models I could use as a replacement) would be greatly
appreciated.
I’m running RedHat 6.2, with HylaFAX 4.2.1 (upgraded a couple days ago).
Apr 12 08:29:24.19: [26109]: --> [20:+FPTS:2,1062,158,6,0]
Apr 12 08:30:01.89: [26109]: --> [19:+FPTS:1,1057,50,4,0]
Apr 12 08:30:25.61: [26109]: --> [21:+FPTS:2,1081,337,15,0]
The bad line counts (158, 50, 337) indicate a fair amount of
communication interference occuring between the modem and the sender. As
this kind of interference increases the number of problems you'll see
will also increase. Many senders will "ignore" the meaning of an RTN
signal, and although it will retrain afterwards it will not resend the
page. Thus, you're only going to see one page here (the 2nd page) which
was not "dirty" enough to trigger RTN.
So the best thing that you could do for yourself is to figure out what
is causing the interference and fix that. However, in the short long
run, as people and businesses start migrating their PBXes and phone
infrastructure to VoIP, many senders will be trying to use it as a fax
medium, and so we're going to have to come to expect a fair amount of
interference as "normal" for uncontrolled environments.
So the next thing you should look at is getting into using ECM. If your
modem supports Class 1 then switch to it. If it doesn't then get a modem
that does.
The last thing... is that HylaFAX probably should, as part of the
"SaveUnconfirmedPages" feature, save pages that were rejected with RTN
because "most" of the time the sender will not retransmit them. So
despite the fact that the page is dirty, we'll need to keep it, because
it's all that we've got. HylaFAX doesn't do this yet.
Lee.
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