The MMU has a fully "Remote Control" mode where the following can be done.
Change the settings at the modem units.
Generate a log file containing an overview of the disabled modems.
Force a hardware reset.
By using a separate "sysop" line to have access to these features the MMU can, if there is still an error, force modem disabling commands per modem individually.
|Read/write date of internal clock||Switch modem off|
|DCD time-out||Switch modem on|
|DTR check time-out||Select rack|
|DTR drop||Reset modem|
|DTR set||Reset all modems of all racks|
|DTR connected to MMS back||Reset all modems in rack|
|Get rack settings||Set # of rings before reset|
|Telephone line disconnected (busy)||Connect serial to modem|
|Telephone line connected||Reset after RXD time-out|
|Get log file||Save string to MMU memory|
|Delete the log file||Send saved string to modem(s)|
|Modem serial settings||Set password|
|Automatic reset/off check MMI||Status of modems|
|Read/write time of internal clock||Reset after TXD time-out|