PEF2256 INFINEON [Infineon Technologies AG], PEF2256 Datasheet - Page 146
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PEF2256
Manufacturer Part Number
PEF2256
Description
E1/T1/J1 Framer and Line Interface Component for Long- and Short-Haul Applications
Manufacturer
INFINEON [Infineon Technologies AG]
Datasheet
1.PEF2256.pdf
(518 pages)
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Figure 53
different external actions. Activation of auto mode and non-auto mode is performed by
bit FMR4.AUTO. Generally, for initiating resynchronization it is recommended to use bit:
FMR0.EXLS first. In cases where the synchronizer remains in the asynchronous state,
bit FMR0.FRS is used to enforce it to lock onto the next framing candidate, although it
might be a simulated one.
5.2.4
The allocation of the FT-bits (bit 1 of frames 1 and 3) for frame alignment signal is shown
in
The FS-bit can be used for signaling. Remote alarm (yellow alarm) is indicated by setting
bit 2 to 0 in each time slot.
Table 34
Frame Number
1
2
3
4
5.2.4.1
For multiframe synchronization, the terminal framing bits (FT-bits) are observed. The
synchronous state is reached if at least one terminal framing candidate is definitely
found, or the synchronizer is forced to lock onto the next available candidate
(FMR0.FRS).
User’s Manual
Hardware Description
Table
34.
gives an overview of influences on synchronization status for the case of
4-Frame Multiframe (F4 Format, T1/J1)
Synchronization Procedure
4-Frame Multiframe Structure (T1/J1)
F
1
–
0
–
T
146
Functional Description T1/J1
F
service bit
service bit
S
DS1.1, 2003-10-23
PEF 2256 H/E
FALC
®
56
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