Agilent Technologies J3972A - Manual (Page 162)

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exactly the same. Network devices based on both standards can co-exist on the
same medium, but they cannot exchange data directly without special, bilingual
software that can decode packets of both types.
EtherTwist
The Agilent Company’s version of 10Base-T.
Extended LAN
A network consisting of two or more LANs that are connected by bridges, routers,
or other similar devices. Resources on the LANs can be accessed by users on any
of the LANs. See also LAN.
Far End Alarm and Control (FEAC)
The Far End Alarm and Control signal is used to send an alarm or status
information from the far end terminal to the near end terminal and to initiate
loopbacks from the far end terminal to the near end terminal. When there are no
status or alarm conditions, the FEAC has a value of all ones.
Far End Block Error (FEBE)
The Far End Block Error (FEBE) is a 4-bit field in the Path Status octet (G1) of a
PLCP frame. The value in the FEBE field is the count of BIP-8 errors received in
the previous frame (0000 through 1000). If FEBE checking is not implemented,
the field is set to all 1s (1111).
FEAC Signal
See Far End Alarm and Control
FID2
FID2 is a 6-byte Transmission Header (TH) used for communication between
subarea nodes and peripheral nodes (PDU2).
FID4
FID4 is a 26-byte Transmission Header (TH) used for communication between
SNA subarea nodes, provided both support Explicit and Virtual Route protocols
(FID0 and FID1 are used if either node does not support Explicit and Virtual
Route protocols, where FID0 is for non-SNA traffic). FID4 supports all SNA
decodes.