peb3456 Infineon Technologies Corporation, peb3456 Datasheet - Page 342

• Manufacturer Part Number: peb3456
• Description: Channelized T3 Termination With Ds3 Framer, M13 Multiplexer, T1/ E1 Framers And 256 Channel Hdlc/ppp Controller
• Manufacturer: Infineon Technologies Corporation

SSP
SSC
Data Sheet
T1: ESF
0
1
Select Synchronization/Resynchronization Procedure
T1: F12
0
1
T1: ESF
0
1
Select Synchronization Conditions
T1
Loss of Frame Alignment (FRS.LFA or opt. FRS.LMFA) is declared if
00
01
10
11
It depends on the selected multiframe format and optionally on bit
FMR.SSP which framing bits are observed:
B
B
B
B
zeros within a time interval of 12 frames are detected in the
received bit stream.
AIS (blue alarm) is indicated, when two or less zeros in the
received bit stream are detected in a time interval of 24 frames.
AIS (blue alarm) detection is only enabled, when framer is in
asynchronous state. The alarm is indicated, when five or less
zeros within a time interval of 24 frames are detected in the
received bit stream.
Specified number of errors in FT framing or specified number of
errors in FS framing leads to loss of synchronization (FRS.LFA).
In the case of FS bit framing errors, bit FRS.LMFA is set
additionally. A complete new synchronization procedure is
initiated to regain pulseframe alignment and then multiframe
alignment.
Specified number of errors in FT framing has the same effect as
above. Specified number of errors in FS framing only initiates a
new search for multiframe alignment without influencing
pulseframe synchronous state (FRS.LMFA is set).
Synchronization is achieved only on verification of the framing
pattern.
Synchronous state is reached when framing pattern and CRC-6
checksum are correctly found.
2 out of 4 framing bits
2 out of 5 framing bits
F12
2 out of 6 framing bits
ESF
2 out of 6 framing bits per multiframe period
4 consecutive incorrect multiframe pattern
342
Register Description
PEB 3456 E
05.2001