pef2256e Infineon Technologies Corporation, pef2256e Datasheet - Page 154
pef2256e
Manufacturer Part Number
pef2256e
Description
E1/t1/j1 Framer And Line Interface Component For Long- And Short-haul Applications
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF2256E.pdf
(518 pages)
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5.2.8
Table 38
Format
F4
F12 (D4)
and
F72 (SLC96)
F24 (ESF)
1)
User’s Manual
Hardware Description
In F12 (D4) format bit 1 in frame 12 is excluded from the synchronization process.
Summary of Frame Conditions (T1/J1)
Summary Frame Recover/Out of Frame Conditions (T1/J1)
Frame Recover Condition
Only one FT pattern found, optional
forcing on next available FT framing
candidate
FMR2.SSP = 0:
Combined FT + FS framing search:
First searching for FT pattern with
optional forcing on next available
framing candidates and then for 2
consecutive correct FS pattern
FMR2.SSP = 1:
Separated FT + FS pattern search:
Loss of FT framing starts first
search for FT and then for 2
consecutive correct FS pattern
Loss of FS framing starts only the
FS pattern
FMR2.MCSP/SSP = 00:
only one FAS pattern found,
optional forcing on next available
FAS framing candidate with
discarding of all remaining framing
candidates.
FMR2.MCSP/SSP = 01:
3 consecutive correct multiframing
found independent of CRC6 errors.
FMR2.MCSP/SSP = 10:
choosing multiple framing pattern
step by step, optional forcing on
next available FAS framing pattern
with discarding only of the previous
assumed framing candidate.
FMR2.MCSP/SSP = 11:
FAS framing correctly found and
CRC6 check error free.
1)
search.
154
1)
1)
.
.
Out of Frame Condition
2 out of 4/5/6 incorrect FT-bits
FMR2.SSP = 0: 2 out of 4/5/6
incorrect FT- or FS-bits
FMR2.SSP = 1:
2 out of 4/5/6 incorrect FT-bits
searched in FT and FS framing
bits,
2 out of 4/5/6 incorrect FS-bits
searched only the FS framing.
2 out of 4/5 incorrect FAS-bits
or
2 out of 6 incorrect FAS-bits per
multiframe
or
4 consecutive incorrect
multiframing pattern
or
more than 320 CRC6 errors per
second interval
Functional Description T1/J1
DS1.1, 2003-10-23
PEF 2256 H/E
FALC
®
56
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