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Publication Title | Connecting to Capstone MicroTurbineTM by Modem

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Subject: Affected:

Capstone Customer Service Toll Free 1-(877) 282-8966

Abstract: Description:


Connecting to Capstone MicroTurbineTM by Modem

All Systems with black colored (Capstone part number 509906-001) modems, manufactured by ARC Electronics, and with system software earlier than version 4.05.

System software upgrade will facilitate reliable modem connections.

Upon reboot or power-up, the MicroTurbine electronics and modem are attempting to initialize simultaneously. Control signals toggled by the UCB RS232 connections for MicroTurbine initialization during this time cause the modem to initialize incorrectly. When the modem is not allowed to initialize with clean RS232 input signals it does not answer incoming phone calls.


After the MicroTurbine has powered up, cycle modem power. This may be done by removing the modem power fuse for several seconds, then replacing it (see page 2). This will cause the modem to reinitialize, and the modem will answer reliably until the next time the MicroTurbine is rebooted, or its power is cycled.

Corrective Action:

For a permanent solution, update the MicroTurbine system software with

version 4.05.

Capstone Customer Service can perform this update for you: take the work- around action, then provide the MicroTurbine modem phone number and request the upgrade by telephone (U.S. 877-282-8966), or email (



June, 2000

This information is confidential and proprietary to Capstone. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered.

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