Cisco Systems 15216 EDFA2 manual Set Gain, Set Alarm Thresholds, Example 4-7 Setting the Gain

Chapter 4 Provisioning Using ASH and SNMP

Set Gain

F I N A L D R A F T - C I S C O C O N F I D E N T I A L

The input power (signal) should be consistent with the input power measured during the optical connection procedure. See the “Optical Connection Procedure” section on page 3-3for more information. The output power value should be 22 dB greater than the input, assuming that the default gain setting is 22 dB.

Note An input power higher than –5 dBm will return a Gain Out of Range alarm that can be cleared by correctly setting the gain value. For more information, refer to Table 2-2 on page 2-2.

4.7 Set Gain

To ensure that the ONS 15216 EDFA2 output signal is received by the transceiver in the network element, it is important that the gain is set correctly.

The desired output power per channel is dependent on the number of channels traversed in the amplifier. The user sets the gain of the amplifier depending on the input power (signal) level, the network application, and the required receiver specifications necessary for error-free operation. Gain range is provided in Table 3-1 on page 3-4.

To set the amplifier gain, enter the snmp attribute set local cerent15216EdfaConstGainOverallGain gainvalue command, where gainvalue is the desired gain multiplied by ten. For example, if the desired gain is 20 dB, the gainvalue would be set to 200. Example 4-7shows the command used to set the gain.

Example 4-7 Setting the Gain

ash:hostname:ONS15216 EDFA2> snmp attribute set local cerent15216EdfaConstGainOverallGain 200

Note Prior to changing or implementing gain changes, consult with the Cisco TAC to ensure proper network operation.

4.8 Set Alarm Thresholds

Alarm thresholds are set so that the network operator can be notified when valid alarms occur via the RJ-45 ALARM OUT and RJ-45 LAN ports on the front panel of the ONS 15216 EDFA2. (See Figure 4-1 on page 4-6.)

Cisco ONS 15216 EDFA2 Operations Guide

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