PEB2256E INFINEON [Infineon Technologies AG], PEB2256E Datasheet - Page 147

• Manufacturer Part Number: PEB2256E
• Description: E1/T1/J1 Framer and Line Interface Component for Long and Short Haul Applications
• Manufacturer: INFINEON [Infineon Technologies AG]

Remote alarm (yellow alarm) is indicated by setting bit 2 to zero in each time slot. An
additional use of the D-bits for alarm indication is user defined and must be done
externally.
5.2.7.1
In the synchronous state terminal framing (FT-bits) and multiframing (FS-bits of the
framing header) are observed independently. Further reaction on framing errors
depends on the selected synchronization/resynchronization procedure (by bit
FMR2.SSP):
• FMR2.SSP = 0: terminal frame and multiframe synchronization are combined
• FMR2.SSP = 1: terminal frame and multiframe synchronization are separated
Data Sheet
Two errors within 4/5/6 framing bits (by bits FMR4.SSC1/0) of one of the above lead
to the asynchronous state for terminal framing and multiframing. Additionally to The
resynchronization procedure starts with synchronizing upon the terminal framing. If
the pulse framing has been regained, the search for multiframe alignment is initiated.
Multiframe synchronization has been regained after two consecutive correct
multiframe patterns have been received.
Two errors within 4/5/6 terminal framing bits lead to the same reaction as described
above for the “combined” mode.
Two errors within 4/5/6 multiframing bits lead to the asynchronous state only for the
multiframing. Loss of multiframe alignment is reported by bit FRS0.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.
Synchronization Procedure
147
Functional Description T1/J1
FALC56 V1.2
PEB 2256
2002-08-27