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Understanding the types of circuit tests

You can run two types of circuit tests in Control Center: performance metrics (PM) and intrusive tests. PM (non-intrusive) testing can be done in less than a minute and is the first type of testing that needs to be performed. Intrusive testing is a second level of testing and are only run if a PM test fails. They're more comprehensive and require your circuit be taken offline for diagnosis.

Performance metrics tests

Performance metrics (PM) tests can be run on circuits without taking them offline. For this reason, PM tests are sometimes called "nonintrusive" tests, because they don't intrude on your day-to-day work activities. You hit a button, and the test is run (almost) immediately. There's no scheduling required.

These tests:

  • Take less than a minute
  • Can be run on an as-needed basis
  • Don't require scheduling
  • Won't interrupt your service
  • Can be run once per hour
  • Available for DS1-level circuits

These tests are your first-line-of-testing defense. With PM testing, we're checking to see if the circuit is being overused or exceeding its bandwidth. If it is, you're probably experiencing latency and jitter, and the problem could be with your equipment or our network.

Intrusive circuit tests

Intrusive circuit tests require more preparation and planning than other tests. That's because they're more thorough. To run this type of test, we must take the circuit offline, which means it will be down temporarily. Consequently, these tests need to be scheduled in advance and you must provide a date/time when we can run the test/take the circuit down.

These tests:

  • Can only be run after a failed PM test
  • Can be run right away
  • Are more thorough than other tests
  • Require up to 30 minutes to complete
  • Will interrupt your service temporarily
  • Available for DS0* and DS1 physical transport types

*PM testing isn't available for DS0-level circuits. To schedule a test for a DS0 circuit, go through the steps to set up a PM test as you normally would. After you enter the circuit's service ID, you'll be prompted to schedule an intrusive test.

Did you know? Intrusive testing usually takes 20 to 30 minutes to run. If it's urgent, you can have us run the test right away. Alternately, you can schedule the test for a more convenient time. We offer four-hour windows, and frequently, customers request tests be done overnight -- say, 1 am to 4 am -- when their businesses are closed.

You can run a PM circuit test or view your circuit test history.

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