EXFO FTB-8100 Series Transport Blazer for FTB-500 - Manual (Page 455)

Next-Generation Tabs
SONET/SDH Application 441
GFP OH TX
³
Type Header
³
PTI (Payload Type Identifier): Allows overwriting the Payload Type
Identifier for the selected frame type.
³
PFI (Payload Frame Check Sequence Identifier): Allows
overwriting the Payload FCS Indicator.
³
EXI (Extension Header Identifier): Allows overwriting the
Extension Header Identifier.
PTI Description
000 Client Data Frame
100 Client Management Frame
001, 010, 011, 101, 110, and 111 Reserved
PFI Description
0 FCS Absent
1 FCS Present
EXI Description
0000 Null Extension Header
0001 Linear Frame
0010 Ring Frame
From 0011 to 1111 Reserved