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Centillion 1200N ATM Switch User Manual 6-9
NTP 297-8103-903
Figure 6-9: G.751 E3 Frame Format
Figure 6-10: G.832 (G.751) E3 PLCP Frame Format
J
FAS : Frame alignment signal
RAI : Alarm indication to the remote di
g
ital multiplex e
q
uipment
N.U : Bit reserved for national use
JSB : Justification service bits
BTAJ : Bits from tributaire available for
j
ustification
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
A1
A1
A1
A1
A1
A1
A1
A1
A1
A2
A2
A2
A2
A2
A2
A2
A2
A2
Z3
Z2
Z1
F1
B1
G1
M2(1)
M1(2)
C1P
0
P1
P
2
P
3
P
4
P
5
P
6
P
7
P
8
ATM CellLast
ATM Cell
First
53 octets11 1 1
18(17) to 20(21) octets
Trailer
125
s
A1,A2
P0-P8
C1
M1,M2
G1
B1
F1
Z1-Z3
:
:
:
:
:
:
:
:
framing octets.
path overhead idenfier octet.
cycle stuff counter.
DQDB layer management information octets.
PLCP path status.
Bit Interleaved Parity-8 (BIP-8)
PLCP path user channel.
.
g
rowth octets.