peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 147

• Manufacturer Part Number: peb2255
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

5.4.7
Table 37
Format
F4
F12 (D4)
and
F72 (SLC96)
F24 (ESF)
1)
Data Sheet
In F12 (D4) format bit 1 in frame 12 is excluded from the synchronization process, if FMR0.SRAF = 1.
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 at first starts
searching 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.
147
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
search FT and FS framing bits,
2 out of 4/5/6 incorrect FS bits
search 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
Functional Description T1/J1
FALC-LH V1.3
PEB 2255
2000-07