Specifications

Watson-Ethernet-Manual.doc
Version 3.3-01
Watson Ethernet
Operating Manual
Revision: 2010-01-20
5-3
5.2.2 Back LEDs
The Watson Ethernet tabletop modem is fitted with 2 LEDs on the backpanel in-
dicating the status of the Ethernet interface: (Activity ACT and High-Speed HS
indicator):
Status LED
ACT (Green)
HS (Amber)
Link down
Off
Off
Link up, 10 Mbps, no activity
On
Off
Link up, 100 Mbps, no activity
On
On
Link up, 10 Mbps, activity
Blinking
Off
Link up, 100 Mbps, activity
Blinking
On
Table 5-5: Tabletop backpanel Ethernet LED indications
5.3 Alarm Conditions
An alarm condition is displayed on the LEDs if one of the following conditions oc-
curs:
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)
 Plug-in 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 ac-
tive (LOOP1, LOOP2, BERT)
 Link integrity alarm on Ethernet user interface
 Alarm cut off is activated (ACO)
5.4 Alarm Relays
5.4.1 Plug-in
Plug-in alarms can be signaled through relay contacts present on the ACU2R
which is normally installed 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 Ethernet plug-in.
Under normal plug-in power conditions the two output stages of each plug-in are
controlled by its microcontroller. In case of a power failure on an plug-in, both the
“Urgent” and “Non-urgent” alarms will be activated on the ACU. (The ACU gene-