EXFO FTB-8500 Series for FTB-500 - Manual (Page 242)

Stream Generation Tabs
228 FTB-8500 Series and FTB-8120NGE/8130NGE
Frame Configuration (Fibre Channel)

EOF: The EOF represents the End Of Frame delimiter. The default
setting is EOFt for Framed Layer 1 and is the only choice for Framed
Layer 2. Choices for Framed Layer 1 are:
EOF Description
EOFt EOF - Terminate
EOFdt EOF - Disconnect-Terminate Class 1 or
EOF - Deactivate-Terminate Class 4
EOFa EOF - Abort
EOFn EOF - Normal
EOFni EOF - Normal-Invalid
EOFdti EOF - Disconnect-Terminate-Invalid Class 1 or
EOF - Disconnect-Deactivate-Invalid Class 4
EOFrt EOF - Remove-Terminate Class 4
EOFrti EOF - Remove-Terminate-Invalid Class 4