PEF2256 INFINEON [Infineon Technologies AG], PEF2256 Datasheet - Page 366
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PEF2256
Manufacturer Part Number
PEF2256
Description
E1/T1/J1 Framer and Line Interface Component for Long- and Short-Haul Applications
Manufacturer
INFINEON [Infineon Technologies AG]
Datasheet
1.PEF2256.pdf
(518 pages)
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EXZE
User’s Manual
Hardware Description
Excessive Zeros Detection Enable
Selects error detection mode in the bipolar receive bit stream.
0 =
1 =
one second according to ANSI T1.403-1999 if the receiver is in
asynchronous state (FRS0.LFA bit is set). In synchronous state
the remote alarm bit is reset. The minimum time between the
end of one transmission of RAI and the beginning of another
transmission of RAI is one second. The RAI is transmitted in the
following forms:
- Superframe Format (F4, F12, F72): For the duration of the
alarm condition but at least for one second bit two in every DS0
channel is a zero, even if the payload is not channelized.
- ESF: For the duration of the alarm condition but at least for one
second a repeating 16-bit pattern consisting of eight “ones”
followed by eight “zeros” is transmitted continuously on the ESF
data link, but may be interrupted for a period not to exceed
100 ms per interruption.
Only bipolar violations are detected.
Bipolar violations and zero strings of 8 or more contiguous
zeros in B8ZS code or more than 15 contiguous zeros in AMI
code are detected additionally and counted in the Code
Violation Counter (CVC).
366
DS1.1, 2003-10-23
T1/J1 Registers
PEF 2256 H/E
FALC
®
56
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