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
...
1 6 -b it 8 4-b it
6 8 0-b it
7 S u b fra m e , e a ch w ith 6 8 0 b its = 1 M -F ra m e w ith 4 7 60 b yte s
IN F O .P Y L D .(In fo rm a tio n P a ylo a d )= 47 0 4 byte s a vailab le fo r th e P L C P
E a ch IN F O .P Y L D .blo ck = 8 4 bits
T he sym bo l . . . re pre se nts a n IN F O .P Y LD .b lo ck
X , F n (w h e re n = 10 0 1 ), C , P, M n (w h ere n = 01 0 ) = D S 3 O verh ea d B it
S u b fra m e
X IN F O .P Y L D . F 1 IN F O .P Y L D . C
C
IN F O .P Y L D . F 0
F 0
C
IN F O .P Y L D .
P
M 1
M 0
X
P
IN F O .P Y L D . F 1 IN F O .P Y L D . C
C
IN F O .P Y L D . F 0
F 0
C
IN F O .P Y L D .
IN F O .P Y L D . F 1 IN F O .P Y L D . C
C
IN F O .P Y L D . F 0
F 0
C
IN F O .P Y L D .
IN F O .P Y L D . F 1 IN F O .P Y L D . C
C
IN F O .P Y L D . F 0
F 0
C
IN F O .P Y L D .
IN F O .P Y L D . F 1 IN F O .P Y L D . C
C
IN F O .P Y L D . F 0
F 0
C
IN F O .P Y L D .
IN F O .P Y L D . F 1 IN F O .P Y L D . C
C
IN F O .P Y L D . F 0
F 0
C
IN F O .P Y L D .
M 0 IN F O .P Y L D . F 1 IN F O .P Y L D . C
C
IN F O .P Y L D . F 0
F 0
C
IN F O .P Y L D .
A 1
A 2
A 1
A 2
A 1
A 2
A 1
A 2
A 1
A 2
A 1
A 2
A 1
A 2
A 1
A 2
A 1
A 2
A 1
A 2
A 1
A 2
A 1
A 2
P 11
P 1 0
P 9
P 8
P 7
P 6
P 5
P 4
P 3
P 2
P 1
P 0
Z 6
Z 5
Z 4
Z 3
Z 2
Z 1
X
X
X
B 1
G 1
C 1
µ
0
se c
P L C P
F ra m in g
P O I
P O H
F irs t AT M C e ll
P L C P P a y lo a d
AT M C e ll
AT M C e ll
AT M C e ll
AT M C e ll
AT M C e ll
AT M C e ll
AT M C e ll
AT M C e ll
AT M C e ll
AT M C e ll
Tw e lfth AT M C e ll
5 3 o c te ts
P O I : P a th O v e rh e a d In d ic a to r
P O H : P a th O v e rh e a d
B IP 8 : B it In te rle a v e d P a rity - 8
X : U n a ss ig n e d
