peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 92
peb2255
Manufacturer Part Number
peb2255
Description
E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEB2255.pdf
(374 pages)
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for submultiframe error indication. Incrementing is only possible in the multiframe
synchronous state.
Note: E-bits may be processed via the system interface. Setting bit TSWM.TSIS enables
Figure 26
Data Sheet
transparency for E bits in transmit direction (refer to
Assume CRC-4 to CRC-4 Interworking:
Confirm Primary BFA Associated with CRC-4 MFA
Adjust Primary BFA if Necessary
Reset Internal Multiframe Alignment Status
(FRS0.LMFA = 0)
CRC4 Multiframe Alignment Recovery Algorithms
Yes
Start CRC-4 Performance Monitoring
Error Count
or LFA ?
OUT of Primary BFA:
IN Primary BFA:
CRC-4
Inhibit Incoming CRC-4 Performance Monitoring
Reset all Timers
Set FRS0.LFA/LMFA/NMF = 110
Start 400 ms Timer
Enable Primary BFA Loss Checking Process
Reset Internal Frame Alignment Status
(FRS0.LFA = 0)
Yes
< 915
_
No
CRC-4 MFA Search
Start 8 ms Timer
MFA be found
No
BFA Search ?
Can CRC-4
in 8 ms ?
Primary
Yes
92
No
Assume CRC-4 to non CRC-4 Interworking:
Confirm Primary BFA
Set Internal 400 ms Timer Expiration Status Bit
(FRS0.NMF = 1)
Continue CRC-4 Performance Monitoring
No
Table
Functional Description E1
BFA Search
Elapsed ?
Parallel
400 ms
Good ?
Timer
Yes
No
Yes
20).
FALC-LH V1.3
ITD10310
PEB 2255
2000-07
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