pef2256e Infineon Technologies Corporation, pef2256e Datasheet - Page 155

• Manufacturer Part Number: pef2256e
• Description: E1/t1/j1 Framer And Line Interface Component For Long- And Short-haul Applications
• Manufacturer: Infineon Technologies Corporation

5.3
5.3.1
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Table 39
Alarm
Red Alarm or
Loss-Of-Signal
(LOS)
Blue Alarm or
Alarm Indication
Signal (AIS)
User’s Manual
Hardware Description
Alarm Indication Signal: Detection and recovery is flagged by bit FRS0.AIS and
ISR2.AIS. Transmission is enabled by bit FMR1.XAIS.
Loss-Of-Signal: Detection and recovery is flagged by bit FRS0.LOS and ISR2.LOS.
Remote Alarm Indication: Detection and release is flagged by bit FRS0.RRA and
ISR2.RA/RAR. Transmission is enabled by bit FMR4.XRA.
Excessive Zeros: Detection is flagged by bit FRS1.EXZD.
Pulse-Density Violation: Detection is flagged by bit FRS1.PDEN and ISR0.PDEN.
Transmit Line Shorted: Detection and release is flagged by bit FRS1.XLS and
ISR1.XLSC.
Transmit Ones-Density: Detection and release is flagged by bit FRS1.XLO and
ISR1.XLSC.
Additional Receive Framer Functions (T1/J1)
Error Performance Monitoring and Alarm Handling
Summary of Alarm Detection and Release (T1/J1)
Detection Condition
no transitions (logical zeros) in a
programmable time interval of 16
to 4096 consecutive pulse
periods. Programmable receive
input signal threshold
FMR4.AIS3 = 0:
less than 3 zeros in 12 frames or
24 frames (ESF),
FMR4.AIS3 = 1:
less than 4 zeros in 12 frames or
less than 6 zeros in 24 frames
(ESF)
155
Clear Condition
programmable number of ones (1
to 256) in a programmable time
interval of 16 to 4096 consecutive
pulse periods. A one is a signal
with a level above the
programmed threshold.
or
the pulse-density is fulfilled and no
more than 15 contiguous zeros
during the recovery interval are
detected.
active for at least one multiframe.
FMR4.AIS3 = 0:
more than 2 zeros in 12 or 24
frames (ESF),
FMR4.AIS3 = 1:
more than 3 zeros in 12 frames or
more than 5 zeros in 24 frames
(ESF)
Functional Description T1/J1
DS1.1, 2003-10-23
PEF 2256 H/E
FALC
®
56