Microsoft KB Archive/244347

= PRB: Failure to Connect with Built-in Modems =

Article ID: 244347

Article Last Modified on 4/14/2004

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APPLIES TO


 * Microsoft Windows CE 3.0 for the Handheld PC
 * Microsoft Windows CE 2.12 for the Handheld PC
 * Microsoft Windows CE 2.11 for the Handheld PC
 * Microsoft Windows CE 2.0 for the Handheld PC
 * Microsoft Windows CE 1.0

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This article was previously published under Q244347



SYMPTOMS
A failure to make a connection with the built-in modem



CAUSE
The default modem settings in use cause a Unimodem modem to assume that a modem can only be issued commands of 40 characters at a time. If a modem command is longer than 40 characters, Unimodem sends the command in separate chunks using a semicolon as the command continuation character. The OEM must verify that the modem command parser can correctly process a semicolon as the command continuation character.



RESOLUTION
For Windows CE Operating System versions prior to 2.12, the OEM must ensure that the built-in modem correctly parses a semicolon ";" as the command continuation character.

For version 2.12 and later, you can use the Unimodem registry key for the built-in modem. In the registry key, you can specify which line continuation character to use in the DWORD value named DialSuffix. Also, if the modem can accept commands longer than 40 characters, you can specify the maximum command length in the DWORD value named MaxCmd.

Keywords: kbprb KB244347

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