EXFO FTB-800 Series for FTB-1 - Manual (Page 186)

Test Setup - Test Configurator, Timer, and System
176 FTB-700G/800 Series
RFC 2544 - Subtests
Frame Loss Configuration
The objective of this test is to find the percentage of frames that are lost
due to lack of resources. Starting at the specified maximum rate (Max.
Rate), the test is performed for a specific frame size and for the specified
duration (Trial Duration). The test is repeated by decreasing the rate by
10 %, then the test is repeated again until there are two successive trials in
which no frames are lost. The test is performed for each defined frame
size.

Max. Rate is the maximum rate the test should begin with, in terms of
a percentage of the line rate (%), Mbit/s, or Gbit/s. The accepted
values are as shown in the Max. Rate table on page 173. For Dual Test
Set, Max. Rate is configurable for both local to remote (L -> R) and
remote to local (R -> L) directions.

Trial Duration represents the time value for each trial in
minutes:seconds: 1 second to 30 minutes (default is 00:01).