peb2256 Infineon Technologies Corporation, peb2256 Datasheet - Page 144

• Manufacturer Part Number: peb2256
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

5.2.6
The use of the first bit of each frame for the multiframe alignment word, the data link bits,
and the CRC bits is shown in
Table 35
Multiframe
Frame Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Data Sheet
above for the “combined” mode.
Two errors within 4/5/6 multiframing bits lead to the asynchronous state only for the
multiframing. Loss of multiframe alignment is reported by bit FRS0.LMFA. The state
of terminal framing is not influenced.
Now, the resynchronization procedure includes only the search for multiframe
alignment. Multiframe synchronization has been regained after two consecutive
correct multiframe patterns have been received.
Extended Superframe (F24 or ESF Format, T1/J1)
Extended Superframe Structure (F24, ESF; T1/J1)
Multiframe
Bit Number
0
193
386
579
772
965
1158
1351
1544
1737
1930
2123
2316
2509
2702
2895
3088
3231
3474
3667
3860
4053
4246
4439
Table 35
FAS
–
–
–
0
–
–
–
0
–
–
–
1
–
–
–
0
–
–
–
1
–
–
–
1
on page 144.
F-Bits
144
Assignments
DL
m
–
m
–
m
–
m
–
m
–
m
–
m
–
m
–
m
–
m
–
m
–
m
–
Functional Description T1/J1
CRC
–
e
–
–
–
e
–
–
–
e
–
–
–
e
–
–
–
e
–
–
–
e
–
–
1
2
3
4
5
6
Signaling
Channel
Designation
A
B
C
D
FALC56 V1.2
PEB 2256
2002-08-27