Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!virtech!cpcahil
From: cpcahil@virtech.uucp (Conor P. Cahill)
Newsgroups: comp.dcom.modems
Subject: Re: Microcom QX/V.32 problems
Keywords: Microcom QX/V.32 MNP modem V.32
Message-ID: <1990May31.012658.12207@virtech.uucp>
Date: 31 May 90 01:26:58 GMT
References: <126654@infocenter.encore.com>
Reply-To: cpcahil@virtech.UUCP (Conor P. Cahill)
Organization: Virtual Technologies Inc., Sterling VA
Lines: 74

In article <126654@infocenter.encore.com> rpainter@encore.com (Rich Painter) writes:
>
> Below I have summarized my problems.  Does ANYONE else have these or
> related or other Microcom problems?  I have been getting a cold shoulder
> from Microcom...

I have 3 QXV.32cs and 3 QX3296s and have had some of the same problems.

> 1.  Connection interruption (+++) in 9600 and 2400/REL causes improper
>     response on the serial interface.  The usual new line and OK

I run mine in SX mode so I don't see this problem.

> 2.  A problem similar to the previous occurs when the unit is left in
>     the command mode and set for no answer (S0=0).  When the telephone
>     rings the modem posts a RING string to the serial port.  Sometimes
>     it prints junk characters.

The junk characters may be comming because the modem has lost track of
what bps to run the serial port at.  I use SX mode so I can permanently
lock the serial port at a given bps.

> 3.  When NO CARRIER appears unexpectedly, the REMOTE modem
>     is permanently hung.  It keeps the telephone line off hook, will
>     not respond to anything sent to the serial port, and will not reset
>     using the reset button.  The unit must be powered off then powered
>     on to reset it.

I have seen this on both models.

> 4.  While connected at 9600 baud, the units will stop passing data.
>     The test light will flash on then off.  The connection will be

This is the same kind of stuff as with problem #3.  I have it happen
all the time on my home phone line and have to use one of my t2500's in 
PEP mode most of the time.  I hate using PEP mode for interactive stuff.
V.32 is much better, however v.32 that keeps locking up is unusable when
compared to working PEP.

I too talked to microcom and they insist that the modems will drop the 
lines (and carrier and hanup) after a short period of time while I have
seen them still on line the monday following a friday lockup.

When the lines just have noise these modems work great, but when a 
certain kind of noise is on the line, they are useless.

> 5.  The LOCAL unit exhibits strange behavior sensitivity to the
>     numbers stored in the directory.  Given a set of eight (8) specific
>     entries, the unit hangs following issuance of AT\F command.  The
>     modem will reset with the reset button.

I don't use the stored number feature.

> 6.  Remote digital loopback does not work.  It reports erroneous
>     results.

ditto.

> 7.  The unit will not connect with some modems at 2400 baud and less
>     without forcing speed to 2400 baud or less (AT%Bx).

I have run into several problems with other 2400 baud modems dialing
into our modems, but these problems are usually with cheap no-name brands
so I haven't spent much time following up with the problem.


I have used these modems to do lots of work cross country with great
results, it's just some problems with some rather noisy lines that
have dissapointed me.

-- 
Conor P. Cahill            (703)430-9247        Virtual Technologies, Inc.,
uunet!virtech!cpcahil                           46030 Manekin Plaza, Suite 160
                                                Sterling, VA 22170