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Unable to detect dial tone

By kozmo_kramer ·
We have run into an interesting situation. We run our core application on an IBM RS6000 F80. We send files thru a Motorola UDS V.3229 modem to a remote vendor. Last week our program (modem?) no longer connects to the phone line. We get a message that the modem is unable to detect a answer tone. We have a backup site where all the same equipment works fine, we transported all the hardware to our main location and experience the same problem using the hardware that works great at the backup site. Our pbx vendor says there are no problems on their system, our phone company says there are not problems on the phone lines. Both vendors say the modem is bad, except it (and all the other hardware involved) works great from the backup site.
I am, of course, supposed to make it work. Not being a genius, I have turned to the site that I most respect for dispensing help.

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by Joseph Moore In reply to Unable to detect dial ton ...

Can you plug a normal telephone handset into the modem line and make sure you get a dial tone? I would do that, just to make sure the phone line is really ok.
Also, do you need to dial 9 or something else to get an outside line? Test this, and make sure your software does the same if needed.
Lastly, and I realize this is a weird thought, but could there be Call Waiting on that phone line? And if so, could there be a call on hold on it? If so, then when you first pick up the line, you would get the click-click-click that indicates Call Waiting. I know that modems really hate that, unless they are programmed to wait a few seconds before they dial. Anyway, something to think about.

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by kozmo_kramer In reply to

The problem seems to have disappeared with no outside influences. Our phone company did some 'tests' on the line and now it works fine. However, they are quick to point out that they did not make any changes to the line and therefore it could not be caused by them. Joseph:Yes, there was a dial tone. We could dial into the modem and it would answer then start training. Yes, we need a nine; however using an outside line(no 9 required) had the same results. No call waiting on any of our lines. Thanks for responding.

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by kozmo_kramer In reply to Unable to detect dial ton ...

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