EXFO FTB-8500 Series for FTB-500 - Manual (Page 370)

TCP Throughput Tabs
356 FTB-8500 Series and FTB-8120NGE/8130NGE
TCP Throughput Analysis

Window Size
Last: Indicates the last TCP window size.
Minimum: Indicates the smallest TCP window size.
Maximum: Indicates the highest TCP window size.
Unit: Select the window size unit. Choices are Bytes, KBytes, and
MBytes. The default setting is KBytes.
TCP Statistics
TCP Statistics are gathered from packets having good Ethernet FCS, IP
header checksum, TCP header checksum, and socket.

Total Transmitted Frames: Indicates the total of frames transmitted by
the local unit excluding the re-transmitted frames.

Total re-Transmitted Frames: Indicates the total of frames that have
been re-transmitted by the local unit.

Round Trip Time (ms)
Last: Indicates the last round trip time in ms gathered from the TCP
Throughput test.
Minimum: Indicates the minimum round trip time in ms gathered from
the TCP Throughput test.
Maximum: Indicates the maximum round trip time in ms gathered
from the TCP Throughput test.
Average: Indicates the average round trip time in ms gathered from the
TCP Throughput test.