Hardware Interface Line Interface
Centillion 1200N ATM Switch User Manual 6-7
NTP 297-8103-903
Figure 6-6: DS3 Frame Format
Figure 6-7: DS3 PLCP Frame Format
...
16-bit 84-bit 680-bit
7 Subframe, each with 680 bits = 1 M-Frame with 4760 bytes
INFO.PYLD.(Information Payload)= 4704 bytes available for the PLCP
Each INFO.PYLD.block = 84 bits
The symbol . . . represents an INFO.PYLD.block
X, Fn
where n = 1001
, C, P, Mn
where n = 010
= DS3 Overhead Bit
Subframe
X INFO.PYLD. F1 INFO.PYLD. C CINFO.PYLD. F0 F0 C INFO.PYLD.
P
M1
M0
X
P
INFO.PYLD. F1 INFO.PYLD. C CINFO.PYLD.
F0
F0 C INFO.PYLD.
INFO.PYLD. F1INFO.PYLD. C CINFO.PYLD. F0 F0 C INFO.PYLD.
INFO.PYLD. F1INFO.PYLD. C CINFO.PYLD. F0 F0 C INFO.PYLD.
INFO.PYLD. F1INFO.PYLD. C CINFO.PYLD. F0 F0 C INFO.PYLD.
INFO.PYLD. F1INFO.PYLD. C CINFO.PYLD. F0 F0 C INFO.PYLD.
M0INFO.PYLD. F1INFO.PYLD. C CINFO.PYLD. F0 F0 C INFO.PYLD.
A1 A2
A1 A2
A1 A2
A1 A2
A1 A2
A1 A2
A1 A2
A1 A2
A1 A2
A1 A2
A1 A2
A1 A2
P11
P10
P9
P8
P7
P6
P5
P4
P3
P2
P1
P0
Z6
Z5
Z4
Z3
Z2
Z1
X
X
X
B1
G1
C1
ยต
0
sec
PLCP
Framing
POI POH
PLCP Payload
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
POI : Path Overhead Indicator
BIP8 : Bit Interleaved Parity - 8
