Aviat Networks ECLIPSE EDGE, Руководство пользователя

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6 Aviat Networks
Chapter 5. Eclipse Edge Commissioning and Troubleshooting
•
Confirming Link Protection for Edge on page 8
•
Hot-standby and Space Diversity for Edge on page 8
NOTE:
No protection switch operation is permitted within a 1 to 2 minute
period from power-on, which is also the time typically required
before Portal log-in is permitted.
Switch Operation Test Measurement for Edge
The procedures described are designed to confirm correct switch operation; they are
not intended to provide verification of switching times to millisecond accuracy.
• The procedures provide confirmation of switch action using errored-second time
resolution.
• Confirmation of switching times with millisecond accuracy is a FAT (factory
acceptance test) procedure. Contact Aviat Networks or your supplier for details.
The check procedures described refer to G.821 BER and G.826 link performance
error measurement:
• The BER test can be established using the built-in BER test capability (on DACs), or
an external hand-held tester.
• The built-in BER test and most hand-held BER testers only provide direct
measurement of errored period with a resolution to one second, as an
errored-second count, which depending on where the second starts and stops in
relation to the interruption may result in a count of 1 or a count of 2 for a service
interruption of less than one second. However, an estimate of the hit period can
be calculated from the Bit Error count (increment of the number of errored bits),
using the circuit data rate. For example, a bit count of 50,000 indicates an outage
of 24 ms on an E1 trib (E1 = 2,048,000 bits per second).
• The G.826 link performance test data is provided in the Performance screen.
• G.826 data provides measurement of errored period with a resolution to one
second, as an errored-second count, which depending on where the second starts
and stops in relation to the interruption may result in a count of 1 or a count of 2
for an interruption of less than one second.
• The procedures involve disconnection of the online Tx ODU cable, or setting a Tx
Mute on the online Tx ODU. These procedures are not appropriate for accurately
verifying Eclipse protection switch times.
NOTE:
The tests for protection switching provided in this section refer to
use of the built-in G.826 link performance data, or to G.821 BER test
capabilities. The built-in BER test function is used for all BER tests
except for DAC testing, when an external tester is used.
Link Protection Logic for Edge
Before testing protection switching, ensure you are familiar with the
following switch process and logic for hot-standby or space diversity
configurations.