[comp.dcom.modems] SupraModem 2400 problem

scott@grlab.UUCP (Scott Blachowicz) (06/09/88)

I have a SupraModem 2400 from Supra Corporation in Albany, OR. It has an
intermittent problem that causes it to drop into command mode after the
"CONNECT xxxx" message shows up. The carrier is still there...I can do
an "ATO" command to reconnect, but this behavior is not very nice for my
uucp dialers to handle. I'm trying to find information from someone on
what could cause the modem to drop into command mode like that. I called
them and the person I talked to said "maybe a chip went, send it back
and we'll replace it". Well, I did that, but he tried it out and it
worked fine for him(surprise, surprise), so he sent it back saying it's
probably a software problem. We're running an HP9000/825 with HP-UX v2.0
which is using HDB UUCP.  If I can find the cause, maybe I can remedy
the problem...

Thanx,
Scott Blachowicz
USPS:  Graphicus                UUCP:    ...!hpubvwa!grlab!scott
       150 Lake Str S, #206     VoicePh: 206/828-4691
       Kirkland, WA 98033       FAX:     206/828-4236

crash@tsc3b21.UUCP (Colossus @ The Forbin Project) (06/10/88)

From article <840001@grlab.UUCP>, by scott@grlab.UUCP (Scott Blachowicz):
> I have a SupraModem 2400 from Supra Corporation in Albany, OR. It has an
> intermittent problem that causes it to drop into command mode after the
> "CONNECT xxxx" message shows up. The carrier is still there...I can do
> an "ATO" command to reconnect, but this behavior is not very nice for my
> uucp dialers to handle. I'm trying to find information from someone on
> what could cause the modem to drop into command mode like that. I called
> them and the person I talked to said "maybe a chip went, send it back
> and we'll replace it". Well, I did that, but he tried it out and it
> worked fine for him(surprise, surprise), so he sent it back saying it's
> probably a software problem. We're running an HP9000/825 with HP-UX v2.0
> which is using HDB UUCP.  If I can find the cause, maybe I can remedy
> the problem...
> 
> Thanx,
> Scott Blachowicz

Normally I'd have replied by mail, but I like the Supra2400 and thought
that perhaps others may have this problem too.

I have a Supra2400 on our 3B2/310 for dial-in/dial-out operation.  I
found that *at least* a 2 second delay is required after the modem
sends a response to the computer.  I haven't tried the numeric result
codes to see if the same delay is required.  So, I have inserted \d
before all of my outputs to the modem except the special case of ""
(if you put \d in front off the null-string code, the pair of double
quotes is actually sent to the modem -- at least on 3B2 HDB).

I had also contacted the company through their Technical Support line
and gave them my symptoms (similar, but not the same, as yours) and
this was the answer that fixed the problem.

I still think it's a great modem, and for $125 external who can beat it??

-----
"Spock, have you finished those computations yet?"
"One *damn* minute, Admiral!"
-----
Frank (crash) Edwards	...!uunet!pdn!boake2!tsc3b21!crash
TSC in Palm Harbor, FL	Phone:  (813) 785-0583  (voice)
"The Sweat Shop"	These opinions belong to no one.  Least of all me.