peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 93

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

4.5
4.5.1
Alarm Indication Signal: Detection and recovery is flagged by bit FRS0.AIS and
ISR2.AIS. Transmission is enabled via 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, RSW.RRA
and ISR2.RA/RAR. Transmission is enabled via bit XSW.XRA.
AIS in time slot 16: Detection and release is flagged by bit FRS1.TS16AIS and
ISR3.AIS16. Transmission is enabled by writing all ones in registers XS1-16.
LOS in time slot 16: Detection and release is flagged by bit FRS1.TS16LOS.
Transmission is enabled by writing all zeros in registers XS1-16.
Remote Alarm in time slot 16: Detection and release is flagged by bit FRS1.TS16RA and
ISR3.RA16. Transmission is enabled via bit CCR1.XTS16RA or XS1.2.
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.
•
Table 21
Alarm
Loss of Signal
(LOS)
Alarm Indication
Signal (AIS)
Remote Alarm
(RRA)
Data Sheet
Additional Functions (E1)
Error Performance Monitoring and Alarm Handling
Summary of Alarm Detection and Release (E1)
Detection Condition
no transitions (logical
zeros) in a programmable
time interval of 16...4096
consecutive pulse periods.
Programmable receive
input signal threshold
FMR0.ALM = 0:
less than 3 zeros in
250 µs and loss of frame
alignment declared
FMR0.ALM = 1:
less than 3 zeros in
each of two consecutive
250 µs periods
bit 3 = 1 in time slot 0 not
containing the FAS word
93
Clear Condition
programmable number of ones
(1-256) in a programmable time
interval of 16...4096 consecutive
pulse periods. A one is a signal
with a level above the
programmed threshold.
FMR0.ALM = 0:
more than 2 zeros in
250 µs
FMR0.ALM = 1:
more than 2 zeros in each of two
consecutive 500 µs periods
set conditions no longer detected.
Functional Description E1
FALC-LH V1.3
PEB 2255
2000-07