System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Traffic architecture
Page 3-10 Proprietary Information Aastra
Connections between the SDH section and PDH kernel
The SDH expansion provides the STM-1/4 interfaces and 10 x 2 Mbit/s
interfaces for the connection of external 2 Mbit/s signals.
In the PDH kernel direction, there are eight 2 Mbit/s interfaces for switching
purposes.
The 64kbit/s switching matrix is used to apply the data of the PDH kernel to
the internal 2 Mbit/s interfaces (E12 internal) of the SDH expansion. Then
the corresponding VC12 is switched via the TU12 switching matrix in the
STM-1 or 2 Mbit/s direction (external).
The following drawing shows the switching matrices used and the resulting
switching options between the SDH expansion and XMP1 PDH kernel.
PDH
64 kbit/s
2 Mbit/s
Ext. 2 Mbit/s
(4 x 2 Mbit/s)
Ext. 2 Mbit/s
(6 x 2 Mbit/s)
STM-1 (West)
SDH
TU12
64kbit
(4 x 2 Mbit/s)
(4 x 2 Mbit/s)
SD bus
E12 internal
E12 internal
AU4
TU3
HOA
STM-1 (East)