HP OMNIBER 718 HP 37718A - Manual (Page 87)

77
Making Measurements
Measuring Service Disruption Time
Measuring Service Disruption Time
Description: Protection switching ensures that data integrity is maintained and
revenue protected when equipment failure occurs. The speed of operation
of the protection switch can be measured.
The sequence of events involved in measuring the switching time is:
• Pattern Synchronization (no errors) is achieved.
• The protection switch is invoked - Pattern Synchronization is lost.
• The standby line is in place - Pattern Synchronization is regained.
The time interval between pattern sync loss and pattern sync gain is a
measure of the disruption of service due to protection switching.
Service Disruption is chosen on the page except for the
following configuration:
• If you choose a DSn or SONET interface and an ANSI (DS1, DS3)
framed, unstructured payload you must select Service Disruption on
the Transmitter and Receiver
display.
RESULTS
TEST FUNCTION