
Watson Ethernet
Operating Manual
Watson-Ethernet-Manual.doc
Version 3.3-01
rates an auxiliary +5 V
DC
which is used to pull-up the open collector alarm output
stages of the plug-ins.)
Both minirack mechanics and the plug-in tabletop housing have urgent and non-
urgent alarm relay contacts.
Urgent Alarm:
At least one of the plug-in – LEDs displays an urgent alarm
Power failure of any one of the plug-ins
Power failure of the auxiliary +5V
DC
auxiliary supply on the ACU
Power failure of both –48V
DC
supplies
Non-urgent Alarm:
At least one of the plug-in – LEDs displays a non-urgent alarm and none of
the plug-in – LEDs displays an urgent alarm
Power failure of any one of the plug-ins
Power failure of the auxiliary +5V
DC
auxiliary supply on the ACU
Power failure of one of the –48 V
DC
supplies
5.5 Initialization Errors
At system startup, various hardware selftests are performed. If any initialization
errors occur, the startup procedure will be aborted and appropriate error mes-
sages are sent to the serial interface (RS-232).
On the Watson Ethernet tabletop an initialization error code in hexadecimal re-
presentation is sent to the serial interface:
Microcontroller RAM test failure
Framer initialization failure
DSL transceiver failure (Loop A)
DSL transceiver failure (Loop B)
Ethernet interface initialization failure
Software Copyright Protection Error
Table 5-6: Software Initialization Errors (tabletop modem).
If several errors are detected simultaneously then the error code displayed is a
combination (OR) of the individual error codes, e.g. 0x83 will be displayed if dur-
ing selftest the RAM test fails, the EEPROM test fails and the Ethernet interface
cannot be initialized.
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