Specifications

W5-Ethernet-Manual.doc

Version 2.0-01

Watson 5 Ethernet

Operating Manual

Revision: 2006-04-27 5-3

5.3 Alarm Conditions

An alarm condition is displayed on the LEDs if one of the following conditions occurs:

Urgent alarm (red):

! Hardware or software failure (blinking)

! Loss of signal / frame alignment on the DSL side (LOSW)

! DSL block-error-rate according G.826 ≥ 30% (BER-H)

! plugin only: overcurrent detected in remote power feeding circuit (CLD)

Non-urgent alarm (amber):

! DSL block-error-rate according G.826 > 15% (BER-L)

! Either Loop 1, Loop 2, Analog Loopback, or the Regenerator Loopback is active (LOOP1,

LOOP2, BERT)

! Link integrity alarm on Ethernet user interface

! Alarm cut off is activated (ACO)

5.4 Alarm Relays

5.4.1 Plugin

Plugin alarms can be signaled through relay contacts present on the ACU2R which is normally in-

stalled in the subrack. Two relays are present on the ACU2R for urgent and non-urgent alarms.

Note: The ACU-48R is not compatible with the Watson 5 Ethernet plugin.

Under normal plugin power conditions the two output stages of each plugin are controlled by its mi-

crocontroller. In case of a power failure on an plugin, both the “Urgent” and “Non-urgent” alarms will

be activated on the ACU. (The ACU generates an auxiliary +5 V

which is used to pull-up the open

collector alarm output stages of the plugins.)

Both minirack mechanics and the plugin tabletop housing have urgent and non-urgent alarm relay

contacts.

Urgent Alarm:

! At least one of the plugin – LEDs displays an urgent alarm

! Power failure of any one of the plugins

! Power failure of the auxiliary +5V

auxiliary supply on the ACU

! Power failure of both –48V

supplies

Non-urgent Alarm:

! At least one of the plugin – LEDs displays a non-urgent alarm and none of the plugin – LEDs

displays an urgent alarm

! Power failure of any one of the plugins

! Power failure of the auxiliary +5V

auxiliary supply on the ACU

! Power failure of one of the –48 V

supplies

Note: If alarm cut off is activated (ACO = on), the alarm relays are disabled.