Cisco ONS 15454 Manual page 82

DLP-G782 Configuring OTDR Port Values
• Reflection Sensitivity (dB)
• Capture Start Point (km/miles)
• Capture End Point (Km/miles)
• Pulse Width (microseconds)
• Measure Time (s)
• Resolution (m)
• Scan Status (Display only)
• Recurrence (Display only)
• Fail Error Message
The OTDR measurement ranges are categorized based on the fiber spans defined for each range. The OTDR
measurement sectors are:
• Zone #1 - 0 to 1 km
• Zone #2 - 0 to 25 km
• Zone #3 - 0 to 80 km
• Zone #4 - Full span
• Expert Mode
• Auto mode (System detect)
Note
Note
Table 7: Loss Sensitivity Value Range for Four Zones
Sector
Zone #1
Zone #2
Zone #3
Turning Up a Node
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Only Loss Sensitivity (dB) and Reflection Sensitivity (dB) column values can be edited in the first
four sectors, Zone #1 to Zone #4, and the Auto mode sector. All the columns in the table, except
Scan Status and Recurrence columns, can be edited in the Expert Mode sector.
The Capture End Point value (length of the fiber span for OTDR scan) is defined automatically for
the Auto mode sector. The other values for the scan (Pulse Width, Measure Time, and Resolution)
are then configured accordingly. The length of the fiberspan is defined based on one of the following
values in the given order:
• Total span loss—It is the sum of fiber span loss between two nodes and Equipment Insertion
Loss for OTDR.
• Configured value in the Fiber attribute—The value of the Fiber attribute is retrieved from the
facing node for the scan from LINE-RX and from the near end node for the scan towards
LINE-TX direction. You can check the value of the configured Fiber attribute at Provisioning
> WDM-ANS > GMPLS/WSON > Fiber Attributes.
• Maximum supported dynamics by OTDR is 21 dB span loss or 100 km length of fiber.
Min (dB)
0.4
0.6
1.5
Max (dB) Default (dB)
5 0.4
5 0.6
5 1.5
Turning Up a Node