PEF2256 INFINEON [Infineon Technologies AG], PEF2256 Datasheet - Page 154

• Manufacturer Part Number: PEF2256
• Description: E1/T1/J1 Framer and Line Interface Component for Long- and Short-Haul Applications
• Manufacturer: INFINEON [Infineon Technologies AG]

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