I'm unable to get faxes working over tdm400p (4fxs modules) Too many errors sending and receiving faxes with an analog fax 1) echocancel=no on the zap channels 2) ztmonitored the channel for a good/low audio volume I'm trying to send fax between zap fxs channels. No way to get it working right Has someone else the same problem?
On January 18, 2005 03:24 am, Sergio wrote:> I'm unable to get faxes working over tdm400p (4fxs modules) > Too many errors sending and receiving faxes with an analog fax > 1) echocancel=no on the zap channels > 2) ztmonitored the channel for a good/low audio volumeI have two fax machines, a Canon IR3300 and an old Epson laser fax. I also have a stamp machine that calls in for more money. When these devices were connected to * via a T100P and Adit600 channel bank everything worked *great*. I could send and receive faxes without issue, and the stamp machine had no trouble. I got rid of the channel bank since I use a PRI connection between our KSU and * now. I bought a TDM430P for these three devices. I can now send faxes just fine, but I cannot for the life of me get reliable fax reception, nor can I get the stamp machine to work well. I took out the T100P so there was only one TDM card in the machine (in case there was a problem with interrupts or something) but that was not the problem. There is just something about either the TDM400P card itself or its driver which makes fax reception (and modem communications to a greater extent) unreliable. As I said, fax transmission works great. Weird eh? My solution was to use app_rxfax() and some glue to have faxes automatically converted to PDFs and placed in a samba share. -A.
>>I'm unable to get faxes working over tdm400p (4fxs modules) >>Too many errors sending and receiving faxes with an analog fax >>1) echocancel=no on the zap channels >>2) ztmonitored the channel for a good/low audio volume >> >> > >I can now send faxes just fine, but I cannot for the life of me get reliable >fax reception, nor can I get the stamp machine to work well. I took out the > >thanks for the reply andrew. Yes the fax "sometimes" works sending and receiving but it's not working as I was expected. Something wrong in the TDM or in the drivers. Maybe it's just a low power problem I will try to change the pci slot and the power connector but I think tdm is good for voice not for data.>My solution was to use app_rxfax() and some glue to have faxes automatically >converted to PDFs and placed in a samba share. > >yes I was trying it out. I'm using an eicon diva with integrated softmodem and I can use capiAnswerFax but I would be able to use an old analog fax. Maybe I should buy one of those sip->fxs converters Sergio
>>My solution was to use app_rxfax() and some glue to have faxes automatically converted to PDFs and placed in a samba share. >> >> >Could you describe more detaily how this could be done. I plan to do >ou can start from here ftp://ftp.opencall.org/pub/spandsp I had to manually modify the apps/Makefile to get a clean compile but it is working here you can find a guide to get it working in your dialplan http://scottstuff.net/scott/archives/000152.html Sergio
> Sending works nearly perfect. It's the receiving that is a pain. > Well, txfax/rxfax is not exactly what we're talking about here.yes that is right. I have problems sending and receiving I'm using a v90 modem/fax to test the analog fax from a different tdm400p port you can hear some "click" during the handshake between the v90 and the analog fax and I think that is disturbing the handshake or the connection. Too many ECM retransmission so something is going wrong. Maybe it's just an hardware issue. I should try to change the pci slot and the power cord from the PSU. Well I'm still curious to know if someone has got fax over tdm400p working. Sergio
> The situation is opposite here: I have a Philips fax connceted to an > fxs port of a TDM31B, and receiving from the fax to * with rxfax works > great, while transmitting with txfax *never* works...did you hear something wrong during the fax handshake? any micro interruption (click sound) or something similar? thx Sergio