EXFO FTB/IQS-85100G Packet Blazer for FTB-500/IQS-600 - Manual (Page 117)

Test Setup - Test Configurator, Timer, and System
Packet Blazer 107
MAC/IP/UDP
Differentiated Services (available when DS is selected).

DSCP Codepoints:
000000 (CS0) (default), 001000 (CS1), 010000 (CS2),
011000 (CS3), 100000 (CS4), 101000 (CS5), 110000 (CS6),
111000 (CS7), 001010 (AF11), 001100 (AF12), 001110 (AF13),
010010 (AF21), 010100 (AF22), 010110 (AF23), 011010 (AF31),
011100 (AF32), 011110 (AF33), 100010 (AF41), 100100 (AF42),
100110 (AF43), 101110 (EF), 110011 (51), 110110 (54), or
User Defined.

User Defined Codes, available when User Defined has been
selected from the DSCP codepoints, allows to enter a user defined
code from hexadecimal 00 (default) to 3F once the TOS/DS
Config pop-up is closed.

ECN allows the selection of the Explicit Congestion Notification
code: 00 (Not-ECT) (default), 01 (ECT-1), 10 (ECT 0), or 11 (CE).