EXFO FTB/IQS-85100G Packet Blazer for FTB-500/IQS-600 - Manual (Page 187)

Test Results
Packet Blazer 177
Alarms/Errors
GFP (Generic Framing Procedure)
Note: Available from the GFP-F/GFP-T sub-tab.
Alarms

GFP-LFD (GFP - Loss of Frame Delineation)
RX: Indicates that the GFP engine is out of synchronization.
TX: Generates a sufficient number of cHEC uncorrectable errors to
avoid synchronization.

GFP-EXM (GFP - Extension Header Mismatch)
RX: The EXM alarm is declared when the EXI received is different from
the expected EXI (refer to EXI on page 90) without uncorrectable
cHEC, tHEC, eHEC, and no pFCS errors.

GFP-UPM (GFP - User Payload Mismatch)
RX: The UPM alarm is declared when the UPI received is different from
the expected Client Data UPI without uncorrectable cHEC, tHEC,
eHEC, and no pFCS errors. The GFP-F/GFP-T on page 90 displays the
expected UPI value based on the test structure. Refer to page 388 for
more information on UPI values.

GFP-DCI (GFP - Defect Clear Indication)
RX: The DCI alarm is declared when CMF frame is received with an
UPI set to “0000 0011”.
TX: Generates a client DCI by setting the UPI field to “0000 0011”.