peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 148

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

5.5
5.5.1
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 and
ISR2.RA/RAR. Transmission is enabled via 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.
•
Table 38
Alarm
Red Alarm
or
Loss of Signal
(LOS)
Blue Alarm
or
Alarm Indication
Signal (AIS)
Data Sheet
Additional 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)
148
Clear Condition
programmable number of ones
(1-256) 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 optionally
the pulse density is fulfilled and
no more than 15 or 99
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
FALC-LH V1.3
PEB 2255
2000-07