atcomsystems.ca/forum Forums Computers & Programming Computers, Software, Accessories Modem commands

I have a problem with my modem working under Procomm, ECom and HyperTerminal. It dials the number programmed, pauses accordingly, dials the necessary additional digits but then drops the call. I can monitor it and hear the call progress and everything seems fine.

I've tried AT&F, ATZ and I've even set it for X1 so that it doesn't monitor for dial tone. I've also verified that all other settings are correct.

I'm using ATE1Q0S11=200S8=13X1 as the initial setup string after AT&F.

This has been working for me for years. It causes a pause to last 13 seconds and forces the DTMF duration time to be long to dial through auto attendants.

I think that I have activated a command that tells the modem to dial then drop, but I don't know what that is. I still don't understand why initializing it wouldn't clear this, especially when I save it using AT&W0. Any ideas?

Ed -

Can you test it on another line - or on an ICM path or -48V - something just to see if it stays up.

What I'm getting at is maybe it's a line condition from the Telco.

I'll go look for modem commands, but I think I sent them away to that squid in Hawaii who needed a copy of Procomm.

Sam

No, it's not the station port I'm using. I have two different modems sharing the same extension; one works fine and the other does what I described. Of course, I don't try to use them simultaneously.

I'm pretty good with AT modem commands, but when the start getting into the %, / and $ commands, my memory fades. I have Hayes books at the office, but this is for my modem at home where I don't have the docs. I can use my cell phone as a tethered modem for tonight's project if necessary.

I swear that I recall there being a modem command like ATDTxxxxxxx:, and I think that the colon just causes it to stop dialing and await commands from the far end. If that were the case, it's certainly not waiting around for long since it drops the call upon dialing the last digit.

I may just have a bad modem, which is possible. It just seems odd that it does everything else perfectly.

Try ATDT XXXXXXX,,,,,,,,XXX.

No, I already have the comma set for 13 seconds using S8=13. It doesn't drop until after the 13 second pause and the second string of digits for the remote modem's extension number are dialed. It drops immediately after the last digit. It has always worked fine with these settings until recently, so either I screwed something up or the modem is just going bad.

I never use the S8= command. I use a default setting with the string I posted to dial at dial tone and insert however many commas I need to simulate pauses. Modem may be FUBAR.

I would, but Vodavi software doesn't allow enough spaces for that many pauses along with a toll number and a modem extension. I have to force the pause timer long to use their software. Go figure.

Seem to remember you could use L for long pause that would take the place of ,s.

Now you're making my head hurt thinking this late. :scratch:

I remember back when that this symptom was usually due to incompatible compression. The answer was to turn it off, but I do not recall the command.

Ed, the command that puts the modem in so-called "command mode" is ; (semicolon), not :
But this command does not hang up the modem, it just makes it wait for commands from the terminal.
The only other thing I can think of is a security dialback function that is somehow activated. That is, your modem dials in, and then it drops the connection so the receiving modem can initiate the connection as a security precaution.
I would suggest you dial manually through the comm software and see if it goes through.
Also, after the line is dropped, in your comm program, enter ATS86?, this may give you some info (it's the event register). You may have to enter +++ (no AT prefix) before you can communicate with the modem.
Finally in (windows) Device Manager -> your modem -> properties -> diagnostics -> view log (you may also want to check "append to log" temporarily) for some more info.