MX3100N Fax trouble

[tmaged]

Fax Error.pdf
Thought I'd post here just to see if anyone had any ideas. The fax line comes in on a fractional T1 which I know, isn't supported. It will send fine, but I've not been able to get it to receive a single fax. I've used the 2 wire line that came with it. Turned off error correction mode & bumped the modem speed down. It seems to always error with the DCN (disconnect) signal. I'll try any ideas.
Thanks,

[ZOOTECH]

I haven't tried it myself, but our surge protectors come with a DSL line splitter. It has a Line, DSL, and Phone connection. Who knows, it might work with the T1 line.

[mojorolla]

If the coding is JBIG, change it to MMR. JBIG works with ECM. You can also turn down the baud rate. I have one Sharp that will only work at 4800db. Digital phones with analog fax can be a nighmare.

[rayjeek]

I have had a similar situation where where ARM201 could send fax but could not receive.
we tried everything we could but unsuccessful. We tried changing the country destination code on the fax from United Kingdonm to New Zealand then it was able to receive fax. You can give a go to that, just try any other country destination. Good Luck

[tmaged]

Thanks for the input. I'm going to try to go tomorrow. I'll let you know if anything works.

[tmaged]

Nah, nothing worked. I've told them not much I can do using a T1. They'll need a dedicated line to make it work right.
Thanks,

[mojorolla]

What about a fax sync circuit? It takes the distortion out of the line. What codec is the T1 line? The ideal codec would be G.711 to even have a fighting chance. If it is G.729, it will be a constant battle. Vonage offers a VOIP fax line starting at $10 a month.

[tmaged]

What about a fax sync circuit? It takes the distortion out of the line. What codec is the T1 line? The ideal codec would be G.711 to even have a fighting chance. If it is G.729, it will be a constant battle. Vonage offers a VOIP fax line starting at $10 a month.

Umm....you're way over my head now.
It's with McleodUSA/Paetec. Not really sure what codec. I just told my customer it's not supported so there's not much I can do.

[blackcat4866]

What about a fax sync circuit? It takes the distortion out of the line. What codec is the T1 line? The ideal codec would be G.711 to even have a fighting chance. If it is G.729, it will be a constant battle. Vonage offers a VOIP fax line starting at $10 a month.

Sorry I don't follow any of that either, but I would welcome an educated explanation.

From what I can read from your error report the initial handshake is successful. It's an FTT or failure to train, which is an unreadable training signal. I would set up a fax simulator (if you've got one), just to see it receive a few faxes, then be prepared to hold your ground on the "incompatibility" issue. =^..^=

[mojorolla]

A sync circuit is basically a filter. As for the codec, the 729 is a VOIP codec for voice, A 711 line is a non-compressed line used for faxing, although it doesn't always works