peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 194

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

RC1...0…
EXTD…
ALM…
FRS…
Data Sheet
Serial code for the receiver is independent to the transmitter.
00... NRZ (optical interface)
01... CMI (1T2B+HDB3), (optical interface)
10... AMI (ternary or digital dual rail interface)
11... HDB3 Code (ternary or digital dual rail interface)
Extended HDB3 Error Detection
Selects error detection mode.
0…
1…
Alarm Mode
Selects the AIS alarm detection mode.
0…
1…
Force Resynchronization
A transition from low to high initiates a resynchronization procedure
of the pulse frame and the CRC-multiframe (if enabled via bit
FMR2.RFS1) starting directly after the old framing candidate.
Receive Code
Note:FRS is not reset automatically.
Only double violations are detected.
Extended code violation detection: 0000 strings are detected
additionally. Thereafter, next increment of Code Violation
Counter CVC is done after receiving additional four zeros.
The AIS alarm is detected according to ETS300233.
Detection: An AIS alarm is detected if the incoming data stream
contains less than 3 zeros within a period of 512 bits and a Loss
of Frame Alignment is indicated.
Recovery: The alarm is cleared if 3 or more zeros within 512
bits are detected or the FAS word is found.
The AIS alarm is detected according to ITU-T G.775
Detection: An AIS alarm is detected if the incoming data stream
contains for two consecutive doubleframe periods (1024 bits)
less than 3 zeros for each doubleframe period (512 bits).
Recovery: The alarm is cleared if within two consecutive
doubleframe periods 3 or more zeros for each period of 512 bits
are detected.
194
FALC-LH V1.3
E1 Registers
PEB 2255
2000-07