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SONET_Usr.bk Page 202 Wednesday, December 13, 2000 11:11 AM
Background Patterns
Table 3
Foreground
AU-3
TU-2
TU-12 (2 Mb/s)
Unframed
TU-11 (DS1)
Unframed
Table 4
Foreground
TUG-3
TU-2
202
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SDH Operation
AU-3 Background Patterns
Background choice in
Foreground AU-3
---------
Pattern in other TU-2s is numbered.
They contain the word 11NNNNNx,
where NNNNN is the binary number of
the TU.
TU-12 structure, unframed with 2E15-1,
2E9-1 PRBS or 1100 word pattern in all
information bits.
TU-11 structure, D4 framed with 2E15-
1, 2E9-1 PRBS or 1100 Word pattern in
other TU-11s.
TUG-3 Background Patterns
Background choice in
Foreground TUG-3
---------
Pattern in other TU-2s is numbered. They contain the word
11NNNNNx, where NNNNN is the binary number of the TU.
Background choice in
other AU-3s
TU-11, TU-12 Mapping or
AU-3 Word (8 bit user
programmable word).
TU-11, TU-12 Mapping or
AU-3 Word (8 bit user
programmable word).
TU-12, TU-11 Mapping or
AU-3 Word (8 bit user
programmable word).
TU-12, TU-11 Mapping or
AU-3 Word (8 bit user
programmable word).
Background choice in
other TUG-3s
TU-11, TU-12 Mapping or
TU-3 Word (8 bit user
programmable word).
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