Cisco 15216 EDFA2 Specifications download pdf (Page 158)

8-8

Cisco ONS 15216 EDFA2/EDFA2-A Operations Guide, R2.4

July 2004

Chapter 8 Provisioning with TL1

8.8 Set Alarm Thresholds

Table 8-1 Alarm Threshold Attribute Definitions

Attribute

Variable

Definition Syntax

Maximum

Access Description

LOSTH Loss of signal

(input power)

threshold

Integer

(–3100 to

–1500,

–3000

default)

Read-write Alarm notifies operations personnel if

the optical input signal of the ONS

15216 EDFA2 drops below a level that

impacts proper operation of optical

network. Set this attribute at a value

that is appropriate for the intended

application so that the alarm condition

is meaningful. Consult with the Cisco

TAC to determine the threshold value

for your application. As a guideline,

Cisco recommends setting the

threshold value at 3 dBm below the

current input power level of the

amplifier. Valid entries are between

–3100 and –1500 dBm times 100. For

example, if the total input power of the

amplifier is –24 dBm and the loss of

input power threshold required is –27

dBm, the loss of input power alarm

threshold is –2700.

LOSHYST Loss of signal

(input power)

hysteresis

Integer

(0 to 1000,

100

default)

Read-write Used to set the amount the input signal

must increase above the LOS

Threshold level before the alarm is

cleared. This attribute, in conjunction

with the loss of input signal alarm

threshold, enables efficient clearing of

alarms. Set this attribute at a value that

is appropriate for the application so

that the alarm condition will clear

when input is stable. Consult with the

Cisco TAC to determine the correct

value for your application. As a

guideline, Cisco recommends setting

the value 1 dB above the LOS

Threshold value. With this setting, the

module will clear the alarm if it detects

a signal level of 1 dB above the current

LOS Threshold value. Valid entries are

between 0 and 1000 and are in dB

times 100. For example, if the

hysteresis required is 1 dB, the power

alarm hysteresis is 100.

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