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Windows Server 2003 modem not answering

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by dbraff

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I have Windows Server 2003 with an external USRobotics serial modem. The modem is configured for incoming connections. I have been diagnosing a problem wherein the modem will not answer a dial-in attempt.

I found that when the modem works, the CS (Clear-to-Send) and TR (Terminal Ready) lights are on. When the modem does not answer, the TR light is off.

When I replaced the modem with another modem, the TR light did not come on. If I disable the modem via Control Panel>Device Manager>Modems>General tab, the TR light goes off (and I cannot enable it again from that display).

The only way I have found to get the modem to answer (i.e., get the TR light on) is to do a restart of the server. During the restart, I see the server query the modem. Shortly after the logon prompt window appears, the modem TR light comes on, and all is well.

I expect there is a way to reset the modem without doing a complete restart, but I have not found it yet. Any suggestions would be appreciated.

Thanks.

1 reply

by sgt_shultz

so you are saying, you can go into Hyperterminal and give it the at commands to answer (ATA) and see the TR light come on?
gee. if we had a model number maybe we could help better. without more data, i would say, sounds like you are hot on the trail. lots of ways to force a reset. i would be examining the dip switches on the thing and visiting the usr website for help and manuals...

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