Specifications

Watson TDM

Operating Manual

Watson-TDM-Manual-W.doc

Version 2.0-01

6-4

Revision: 2008-02-07

6.4 Alarm Relays

The ACU2R [2], the minirack mechanics [7] and the plug-in tabletop housing [8]

have two alarm relays to signal urgent and non-urgent alarms:

Urgent Alarm:

• At least one of the plug-in LEDs displays an urgent alarm

• Power failure of both –48V

supplies

Non-urgent Alarm:

• At least one of the plug-in LEDs displays a non-urgent alarm and none of the

LEDs displays an urgent alarm

• Power failure of one of the –48 V

supplies

6.5 Initialization Errors

At system startup, various hardware selftests are performed. If any initialization

errors occur, the startup procedure will be aborted and the monitor will display an

initialization error code in hexadecimal representation. The table below lists the

possible initialization errors and their corresponding error codes:.

Error Code Initialization Error

0x01

Microcontroller RAM test failure

0x04

Framer initialization failure

0x08

DSL transceiver failure (Loop A)

0x10

DSL transceiver failure (Loop B)

0x1000

DSL transceiver failure (Loop C)

0x2000

DSL transceiver failure (Loop D)

0x40

Nx64 interface initialization failure

0x100

E1 interface initialization failure

0x8000

Software Copyright Protection Error

Table 6-6: Software Initialization Errors

Several initialization errors might occur simultaneously. In this case the error

code displayed is the logical OR of the individual error codes. For example if

both the microcontroller RAM test fails (error code 0x01) and the framer initializa-

tion fails (error code 0x04) then code 0x05 will be displayed.