Frames Structure; Figure 91. Sdh Multiplexing Structure And Au-3/Tu-3 Conversion - Alcatel 1850 TSS-320 Technical Handbook

3.10 Frames Structure

The SDH Standard offers a considerable quantity of service channels in the Section OverHead (SOH)
bytes of the frame. These bytes are used for section maintenance (frame alignment, parity check, network
management operations, auxiliary communications, etc.).
For reader's convenience, the structures of some SDH frames involved in the equipment are reported in
the following pages. Reference specifications: ITU-T G.707
x
x
AU-4
STM-N AUG
x
Pointer processing
Multiplexing
.....
Aligning
Mapping

Figure 91. SDH multiplexing structure and AU-3/TU-3 conversion

Technical Handbook Common
Functional Description
x
.....
VC-4
x
TUG-3
AU-3
......
VC-3
x
TU-3
......
VC-3
x
x
TU-12
......
TUG-2 VC-12
AU3/TU3 CONVERSION
Alcatel 1850 TSS-320 Rel. 1.1
8DG 07734 AAAA Edition 01
139
C-4
kbit
447
kb/
C-3
343
kb/
204
C-12
kbit
145/270