[comp.dcom.modems] Problems with S92

andrew@ramona.UUCP (Andrew Ernest) (09/11/88)

Oh boy, am I having fun with the new blazer.  A day after it arrived I
discovered that it has a kink in its handling of S92=1 (what I call
"PEP-tones-last" mode).  If a human (or a salesperson) accidentally
calls the modem and then hangs up, the blazer will answer all future
calls with ONLY PEP tones, making it impossible for anything but
another blazer to talk to it.  After much experimentation (with hours
of help from a friend), we found that the modem could be induced to
return to normal if someone called it and simply waited for the blazer
to exhaust itself and hang up.  Only then would it give the expected
sequence of tones on the next call.  (Well, dialing out also fixes the
problem but this modem does *much* more answering than calling.)

So, we reluctantly switched to S92=0, which prohibits certain
blazerless systems from calling ramona.  But at least it seemed to fix
the problem.  We could call the modem from a regular phone, hang up,
and the blazer would still answer the next call normally.  Alas, today
we discovered the blazer issuing only PEP tones again but this time
refusing to return to normal even when we called it by hand and waited
for it to hang up.

So we are experiencing two different buggy behaviors, depending upon
the setting of S92.  The first one is 100% reproducible and possible
to fix remotely while the second one appears to occur randomly and
cannot be fixed remotely.  My questions to the world are:

1. Has anyone else experienced this?

2. Is this a known problem with the firmware or do I have a broken
   modem?

3. Is there something wrong with the register settings below?

I welcome responses by e-mail or postings to this group (if the
material is of interest to everyone).

Thanks very much in advance,
Andrew (uunet!ramona!andrew)

---------------Spindle, fold, and mutilate along dotted line---------------
E1 F1 M0 Q0 P V1 X1     Version BA4.00
S00=001 S01=000 S02=043 S03=013 S04=010 S05=008 S06=002 S07=060 S08=002 S09=006
S10=007 S11=070 S12=050 
S45=000 S47=004 S48=000 S49=000
S50=000 S51=255 S52=002 S53=004 S54=003 S55=003 S56=017 S57=019 S58=000 S59=000
S60=000 S61=045 S62=003 S63=001 S64=001 S65=000 S66=000 S67=000 S68=255 
S90=000 S91=000 S92=001 S95=000 
S100=000 S101=000 S102=000 S104=000 
S110=000 S111=030 S112=001 
S121=000