Re: Multitech MT5634ZBA vs Mainpine IQ Express

On 07/29/2016 10:32 AM, Andras Kende wrote:
> I’m running 4 fax servers with about 50 modems, everything works great...
>
> Just wondering if a Mainpine IQ Express board would work even better than a MT5634ZBA
>
>
> HylaFAX+ 5.5.8
> Fedora 23 Server
> Multitech MT5634ZBA USB
> Dell optiplex core2 cpu, usb external hubs

All else the same, with the IQ Express you would expect to see the same 
or better results as with the MT5634ZBA.

The modem chipset that the IQ Express uses is a later generation from 
the one that the MT5634ZBA uses.  (Lucent --> Agere --> LSI)

If with a well-developed modem (such as the IQ Express and MT5634ZBA) 
you are experiencing significantly higher-than-expected failures due to 
protocol failures in Class 1/1.0 such as...

4461	COMREC received DCN (sender abort) {E108}
4083	V.21 signal reception timeout; expected page possibly not received in full {E111}
2540	No response to PPS repeated 3 times. {E147}
2327	T.30 T2 timeout, expected signal not received {E118}
2232	Failure to train remote modem at 2400 bps or minimum speed {E137}
1639	RSPREC error/got DCN (sender abort) {E103}
1607	DIS/DTC received 3 times; DCS not recognized {E136}
1583	No response to MPS repeated 3 tries {E150}
655	No receiver protocol (T.30 T1 timeout) {E126}
648	Failed to properly detect high-speed data carrier. {E112}
638	Failure to transmit clean ECM image data. {E143}


... then generally the problem has more to do with the quality of the 
line audio than it does with the modems.

You can't usually control line audio quality on the remote end, but you 
generally can control it on your end and on your carrier's end (even if 
that requires switching providers and carriers).

Thanks,

Lee.

-- 
*Lee Howard*
*Mainpine, Inc. Chief Technology Officer*
Tel: +1 866 363 6680 | Fax: +1 360 462 8160
[email protected] | www.mainpine.com