as necessary to compensate for test point or cable attenuation characteristics.
E1 Pulse Mask
E3 Pulse Mask
21.2 E1 APS Service Disruption Testing
This function measures the Automatic Protection Switching (APS) limits of the network. APS applies the Multiple E1 Links and
enables network elements to reroute traffic to a backup circuit in the event of network failure or problems.
Test Procedure:
1. The should be connected to transmission system to ensure that the switching time is measured for the service
transported by the E1 links.
2. Ensure that no errors or alarms are present on the transmission system because this will impact the measurement.
3. The measurement will be triggered by an Alarm Indication Signal (AIS) or a Test Sequence Error (TSE) event of >1 x 10-4
4. The measures how long the AIS or TSE event remains present after the event is first recognized and will
continue to measure the total disruption time in the event of multiple disruptions
E1 APS Testing
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