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Power Consumption and Heat Dissipation
Performance Parameters
Based on the monitored parameters, the COLU derives the following performance parameters:
•
MAR – A measure of the ratio of signal power to noise power, in dB, at a receiver point. A value of 0 dB
means that the predicted transmission BER is equal to 10
BER is equal to 10
value. You can set the high and low values of this parameter for the COLU and the RT at the
Types Screen" on page 37
View the results of these settings at the
•
LOSW – The COLU detected an error in one or more bits in five consecutive HDSL SYNC words. Five
consecutive SYNC words must be received without error to clear this condition. A LOSW condition generally
indicates the loop is down, thus data cannot be transmitted. The COLU uses this parameter to derive UAS
performance parameter. You can set the severity of the alarm at the
page
39. View the results of these settings at the
•
HDSL ES – An interval of 1 second during which at least one CRC is detected at the incoming HDSL port.
You can set the value of this parameter for the COLU and the RT at the
page 37,
and at the
severity of the alarm. View the results of these settings at the
•
HDSL UAS – An interval of 1 second during which a loop is down. You can set the value of this parameter
for the COLU and the RT at the
Screen" on page 37
Summary Screen" on page
Alarms
The COLU generates alarms for problem conditions on the HDSL transmission facility and at the application
interface. You can view the alarm status from the
•
MAR – The margin default value or a value you selected has been reached, or the unit is below the current
threshold value set.
•
ES – The errored seconds are measured by both 15-minute or 24-hour thresholds. The threshold has been
reached or exceeded if an alarm exists.
•
UAS – The unavailable seconds are measured by both 15-minute or 24-hour thresholds. The threshold has
been reached or exceeded if an alarm exists.
•
PFO – The COLU cannot power the RTs due to an open circuit.
•
PFS – The COLU cannot power the RTs due to a short circuit.
•
PGF – The COLU cannot power the RTs due to HDSL Tip or Ring Fault to GND.
•
LOSW – If the alarm is on the COLU, then the COLU cannot synchronize with the A or B RT, then both the
COLU and the A or B RT are out of service. If the alarm is on the RTs, then the A or B RTs cannot
synchronize with the COLU, and the COLU and either RT A or B are out of service.
•
MISPWRn – Power supply n is missing (where n is A or B).
•
MISMATCHn – Incompatible RTn unit is installed (where n is A or B). For example, a COLU List 1 has been
connected to a 2 ISDN RT.
•
NORTSWn – RTn has no application software and is awaiting software download (where n is A or B).
4
-10
. The Main menu option Status Summary displays continuous updates of the margin
and the severity of the alarm at the
"Main Summary Screen" on page 18
"From the CONFIG submenu you can perform the following tasks:" on page 33
"System Alarm Types Screen" on page 37
set the severity of the alarm. You can view the results of these settings at the
21.
January 6, 2003
-7
, a value of 6 dB means the predicted transmission
"System Alarm Types Screen" on page
"HDSL Alarm Thresholds Screen" on
"HDSL Summary Screen" on page
"HDSL Summary Screen" on page
"COLU Main Screen" on page
SCP-PLL720-020-03H
"System Alarm
21.
"System Alarm Types Screen" on
21.
and at the
"System Alarm Types
"HDSL
16.
PLL-720, PLL-721 List 2's
37.
set the
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