PXB4340E Datasheet, PDF (37/185 Pages) Infineon Technologies AG – ICs for Communications

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configured as an
F5 orginating end point
configured as an
F4 originating end point and
F5 originating segment point
configured as an
F4 intermediate point
configured as an
F4 intermediate point
configured as an
F4 terminating end point and
F5 intermediate point
configured as an
F5 terminating segment and
F5 terminating end point
1
F5 Segment
LB
4
4
set LB indication
flag to 0
2
LB cell
looped back
5
3
LB cell
looped back
AOPE
configured as an
F5 terminating end point
AOPE
LB status = 1
configured as an
F4 terminating end point and
F5 terminating segment point
AOPE
LB status = 1
configured as an
F4 intermediate point
AOPE
LB status = 0
configured as an
F4 intermediate point
AOPE
LB status = 0
AOPE
configured as an
F4 originating end point and
F5 intermediate point
configured as an
F5 originating segment and
F5 originating end point
insertion of F5 LB cell
drop LB cell to µP
receive cell buffer
set LB indication
flag to 0
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If the LB indication of an LB cell is equal to 0 (LB cell already looped) and the connection is in
LB state (LB state = 1) and the LB source ID of the LB cell is equal to the network element ID
(LB source ID match) the LB cell is copied into the receive cell buffer of the µP and the LB cell
is forwarded to the terminating segment point. If the LB source ID flag of a connection is disabled
the LB cell is also copied into the receive cell buffer of the µP and the LB cell is forwarded to the
terminating segment point.
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1
don’t care enabled
match
• set LB indication to 0
• LB cell is looped back
• forward of LB cell to terminating
segment point
enabled
disabled
mismatch
don’t care
forward of LB cell to terminating
segment point
0
0
don’t care
don’t care
forward of LB cell to terminating
segment point
1
disabled
don’t care
• copy of LB cell to µP receive cell
enabled
match
buffer
• forward of LB cell to terminating
segment point
enabled
mismatch
forward of LB cell to terminating
segment point
Data Sheet
2-37
04.2000