MTU-M Front Panel
7-2
7900-A2-GB20-00
March 1998
MTU-M Front Panel LEDs
The MTU-M front panel LEDs indicate the presence of system, network, and loop
error conditions. If a Major or Abnormal alarm condition exists in the network or
loop, the MAJOR and ABNML alarm LEDs light indicating there is an alarm
condition. Further isolation of the alarm condition is performed using the system
terminal. Minor alarm circuitry is not currently used.
Alarm Cut Off (ACO)
The ACO push button and LED allow you to manually shut off external alarms
generated by the MTU-M. After pressing ACO, the ACO LED lights indicating
ACO is active. ACO does not prevent alarms from being reported to the MTU-M
system terminal.
Reset
The RESET push button allows you to manually reset the MTU-M. This feature
performs the same reset of the MTU-M provided by the Reset option from the
Main Menu screen.
Summary of Contents for HOTWIRE 7900
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