peb3456 Infineon Technologies Corporation, peb3456 Datasheet - Page 98

• Manufacturer Part Number: peb3456
• Description: Channelized T3 Termination With Ds3 Framer, M13 Multiplexer, T1/ E1 Framers And 256 Channel Hdlc/ppp Controller
• Manufacturer: Infineon Technologies Corporation

Loss of Signal
(LOS)
Remote Alarm
(RRA)
4.7.3
4.7.3.1
Alarm detection and generation
Alarm Indication Signal:
Detection and recovery is flagged by bit FRS.AIS and the ’Alarm Indication Signal Status’
interrupt vector. Transmission is enabled via bit TFMR.XAIS.
Loss of Signal:
Detection and recovery is flagged via bit FRS.LOS and a ’Loss of Signal Status’ interrupt
vector.
Remote Alarm Indication:
Detection and release is flagged by bit FRS.RRA and a ’Remote Alarm Status’ interrupt
vector. Transmission is enabled via bit TCMDR.XRA.
Table 4-10
Alarm Indication
Signal (AIS)
Data Sheet
Alarm
Common Features for E1 Doubleframe and CRC-4 Multiframe
Error Performance Monitoring and Alarm Handling
Summary of Alarm Detection and Alarm Release
Detection Condition
PCD Register
No transitions (log. zero
octets) in a programmable
time interval of 16 - 512
consecutive pulse periods.
FMR0.ALM = 0:
less than 3 zeros in
250
alignment declared
FMR0.ALM = 1:
less than 3 zeros in each of
two
frame periods
bit 3 = 1 in time-slot 0 not
containing the FAS word
consecutive
s and loss of frame
98
double
Clear Condition
PCR Register
Programmable amount of ones
(1-63) in a progr. time interval of
16 - 512 consecutive pulse
periods. The pulse density is
fulfilled and no more than 15 or 99
contiguous
recovery interval are detected.
FMR0.ALM = 0:
more than 2 zeros in 250 s and
frame alignment found
FMR0.ALM = 1:
more than 2 zeros in each of two
consecutive double frame periods
set conditions no longer detected.
Functional Description
zeros
PEB 3456 E
during
05.2001
the