Knowledge Base

Err Msg: Another Program Is Using the Selected Telephony...

Article ID: 158370

Article Last Modified on 11/1/2006

Microsoft Windows NT Server 4.0 Standard Edition
Microsoft Windows NT Workstation 4.0 Developer Edition

This article was previously published under Q158370

SYMPTOMS

When you add a second modem to a computer and attempt to use it, you may receive the following error message:

Another program is using the selected telephony device. Try again after other program completes.

CAUSE

This error message occurs if a telephony program was started before the modem was added.

RESOLUTION

You must shut down and restart the computer before you can use the second modem.

MORE INFORMATION

When a modem is used, the following components are loaded into memory:

Modem.sys
Tapisrv.exe
Unimodem.tsp

Until these components are unloaded, a TAPI-aware program cannot use a modem that was added after these components were started.

Additional query words: prodnt

Keywords: kbsetup KB158370