EXFO FTB-800 Series for FTB-1 - Manual (Page 334)

Test Results
324 FTB-700G/800 Series
S-OAM
S-OAM
From the Test menu, tap Results, and the S-OAM tab.
Loopback

Status displays the status of the test function (refer to page 364).

TX LBM indicates the count of transmitted LBM frames.

RX LBR indicates the count of received LBR frames having their source
MAC address matching the Peer MEP MAC address, the destination
MAC address matching the unit port MAC address, and VLANs
matching the unit port VLANs.

LBR Timeout
For connectivity verification (Continuous check box cleared), indicates
the count of LBR Timeout event which occurs if a reply (LBR frame
with matching Transaction ID) to a transmitted LBM frame is not
received within 5 seconds.
For diagnostic test (Continuous check box selected), indicates the
difference between the transmitted LBM frames and the received LBR
frames.

Invalid LBR
For connectivity verification (Continuous check box cleared), indicates
the count of LBR frames received from the peer MEP with incorrect
MEG/MD Level or with an unexpected Transaction ID.
For diagnostic test (Continuous check box is selected), indicates the
count of LBR frames received from the peer MEP with incorrect
MEG/MD Level.

Invalid Payload indicates the count of received LBR frames having
either a TLV type different than the one transmitted, Bit error or wrong
data value detected in the data payload of a Data TLV, Bit error, Pattern
Loss, or Pattern Type mismatch of a Test TLV.