Microsoft KB Archive/158370

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

Article ID: 158370

Article Last Modified on 11/1/2006

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APPLIES TO


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

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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

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