Operation and Maintenance
This chapter includes miscellaneous operating and maintenance procedures,
including:
9000-A2-GB33-20
Modem Operation
on page 4-2
—
Activating the Modem PassThru Feature
—
Canceling Modem PassThru Operation
—
Manually Disconnecting the Modem
—
Verifying Modem Operation
ISDN DBM Operation
on page 4-4
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Forcing Backup (Disruptive)
—
Placing a Test Call (Nondisruptive)
—
Verifying ISDN Lines
—
Verifying That Backup Can Take Place
FTP File Transfers
on page 4-7
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Upgrading System Software
—
Upgrading ISDN BRI DBM Software
—
Determining Whether a Download Is Completed
—
Changing Software
—
Changing Software
Turning Off the System Alarm Relay
Hardware Maintenance for Models 9520, 9520-ILM, and 9820-45M
page 4-14
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Cleaning the Front Panel Assembly
—
Replacing the Front Panel Assembly
—
Replacing a Power Module
May 2003
on page 4-13
4
on
4-1