peb3456e Infineon Technologies Corporation, peb3456e Datasheet - Page 86

• Manufacturer Part Number: peb3456e
• Description: Channelized T3 Termination, With Ds3 Framer, M13 Multiplexer, T1/e1 Framers And 256-channel Hdlc/ppp Controller
• Manufacturer: Infineon Technologies Corporation

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4.6.3.2
There are two possibilities of remote alarm (yellow alarm) indication:
• Bit 2 = ’0’ in each time slot of the frame, selected with bit R/TFMR.SRAF = 0
• The last bit of the multiframe alignment signal (bit 1 of frame 12) changes from ’0’ to
Generation
If TFMR.AXRA=1, the remote alarm sequence will be automatically sent in the outgoing
data stream when the receiver is in asynchronous state (FRS.LFA bit is set). Remote
Alarm is also sent unconditionally when TCMDR.XRA = 1.
Detection
Remote alarm (yellow alarm) is detected and flagged with bit FRS.RRA which will be
reset automatically when the alarm condition is no longer detected.
Data Sheet
‘1’, selected with bit R/TFMR.SRAF = 1.
multiframe alignment is initiated. Multiframe synchronization has been regained
after two consecutive correct multiframe patterns have been received.
Terminal frame and multiframe synchronization are separated. Two errors
within 4/5/6 terminal framing bits will lead to the same reaction as described
above for the ’combined’ mode. Two errors within 4/5/6 multiframing bits will
lead to the asynchronous state only for the multiframing. Loss of multiframe
alignment is reported via bit FRS.LMFA. The state of terminal framing is not
influenced. Now, the resynchronization procedure includes only the search for
multiframe alignment. Multiframe synchronization has been regained after two
consecutive correct multiframe patterns have been received.
Remote Alarm (Yellow Alarm) Generation / Detection
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Functional Description
PEB 3456 E
05.2001