Ethernet
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102
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The Frame Delay Variation, also known as (packet) jitter was not included in RFC 2544. Jitter is a
critical parameter for real time voice and video services. It is now part of the SAM test suite.
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RFC 2544 validates the service parameters like frame loss, throughput and latency, one after the
other, while SAM allows testing all the service critical parameters simultaneously. This results in sig-
nificant time saving compared to RFC 2544.
Comparison of RFC 2544 and Y.1564
Test Methodology
The purpose of the SAM test suite is to verify that the service is compliant to its Bandwidth Profile and Service
Acceptance Criteria. The test is broken down into two phases:
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Phase 1: Service Configuration test
: The services running on the same line are tested one by one
to verify the correct service profile provisioning.
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Phase 2: Service Performance test
: The services running on the same line are tested sim-
ultaneously over an extended period of time, to verify network robustness.
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