EXFO FTB-8500 Series for FTB-500 - Manual (Page 187)

Traffic Analyzer Tabs
Ethernet and Fibre Channel Application 173
Flow Control
Note: When entering a value in μs/ns it will be rounded to the closest multiple of
0.512 μs for 1000 Mbps, 5.12μs for 100 Mbps, 51.2μs for 10 Mbps, and
51.2 ns.
Unit: Select the measurement unit. Choices are Quanta and μsns
(nanoseconds). The default setting is Quanta.
Inject Pause button: Injects the defined packet pause time.

Destination MAC Address
Enable: Allows enabling the destination MAC address. This setting is
disabled by default.
Destination MAC Address: Allows entering the destination MAC
address once enabled. The default setting is the control protocol
multicast address: 01:80:C2:00:00:01.