EXFO FTB-8100 Series Transport Blazer for FTB-500 - Manual (Page 449)

Next-Generation Tabs
SONET/SDH Application 435
GFP Channel TX
GFP Channel TX
Press TEST, GFP, and Channel (under GFP TX).
Configuration
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Client Data Frames FCS enables the presence of the payload FCS for
the client frames. This setting is enabled by default. Not supported with
GFP-F over OPU2 and GFP-T over OPU0.
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Client Management Frames FCS enables the presence of the payload
FCS for the management frames. This setting is disabled by default.
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CID (Channel IDentifier) selects the communication channel used for
the signal transmission. Choices are from 00000000 through 11111111
(0 to 255). The default value is 0 when EXI is set to Linear. CID not
available when EXI is set to Null (see GFP Frame TX on page 432).
Note: The CID value is the same for both the Client Management and Data
Frames. CID is not available with GFP over OPU2.