System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Multiplex structure
Aastra Proprietary Information Page 3-9
3.5.1.2 Multiplex structure
Mapping
The SDH expansion uses a subset of the multiplex structure as defined in
ITU-T G.707. The diagram below shows the multiplex structure used in the
SDH expansion.
3.5.2 Traffic architecture
The SDH expansion is primarily based on the functions of the SDH Core
Processor SCP which provides the functions for data processing and
switching.
The following diagram gives an overview of the traffic architecture and the
connections between two SCUs and the XMP1 PDH kernel.
STM-1 AUG-1
TUG-3
TUG-2
TU-12
VC-4
VC-12 C-12
x7
x3
AU-4
x1
x1
x3
Pointer processing
Multiplexing
Aligning
Mapping
Figure 3.3: Multiplex structure of SDH expansion
Switch A
SCP
Line
West A
Line
East A
Switch B
SCP
Line
West B
Line
East B
XMP1
PDH
kernel
SDH Core
Unit A
SDH Core
Unit B
Trib B
Trib A