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Making Measurements
Measuring Round Trip Delay
Measuring Round Trip Delay
Description: The time taken for voice traffic to pass through the network is very
important. Excessive delay can make speech difficult to understand.
The Round Trip Delay feature of the HP 37717C measures the delay in a
64 kb/s timeslot.
A test pattern is transmitted in the 64 kb/s timeslot and a timer is set
running. A loopback is applied to the network equipment to return the
test signal. The received pattern stops the timer and the Round Trip
Delay is calculated.
NOTE You can only measure Round Trip Delay on a 64 kb/s test signal.
HOW TO: 1 If measuring on an SONET interface, set up the SONET transmit and
receive interfaces and payload required. See “Description” page 6 and
“Setting SONET Receive Interface” page 21.
2 If measuring on a PDH interface, set up the PDH transmit and receive
interfaces and payload required. See “Setting PDH Transmit
Interface” page 2 and “Setting PDH Receive Interface” page 18.
3 Connect a loopback to the network equipment.
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