CANOGA PERKINS 9145E NID Software Version 4.10 - Manual (Page 90)

9145E NID Software User’s Manual Diagnostics
Network Performance
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Duration specifies the amount of time the test will run in minutes and seconds (00:01-
10:00). When the test
Test lets you enable the test. You must enable this field in order to run a test.
2. Set the Test to Enable and press Enter
The test begins immediate and a count is displayed of the number of Packets sent and
Round trip Packets. When the test completes, the Test Field is set to Disable.
3. To view the Latency results, type V and press Enter.
4. To view the Jitter results, type M and press Enter.
4.6.10 Service Availability Monitoring
Provided as a licensed option within the NID, Service Availability Monitoring (SAM) is responsible
for scheduling and performing service availability tests across the network. Service availability is
the percentage of time a given service instance is available to the customer for use in a given
time period. The feature uses a frame loss metric to determine the state transitions between
available and unavailable.
Service Availability for Point-to-Point EVC is defined as in MEF 10.2 Technical Specification
subsection 6.9.7. Service Availability for a Multipoint EVC is defined as in MEF 10.2 Technical
Specification subsection 6.9.8.
There are several parameters used to control the SAM option, as defined below.
Figure 4-34 SAM Parameters
The ∆t time is constrained to be a multiple of the Sample Period. This is accomplished by having
the user define the number of test packets in the FLR period (NTP) rather than the ∆t period.
Therefore, the ∆t period = Sample Period x NTP. Therefore, the range on NTP = ∆t / Sample
Period.
• The relative values of Ca and Cu need to be constrained by having Ca < Cu. This is nec-
essary to avoid undesirable behavior of the availability test results.
The availability computation is done as follows: