System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
SDH Expansion in the XMP1 System
Aastra Proprietary Information Page 3-1
Chapter 3
SDH Expansion in the XMP1 System
3.1 Introduction
From the SDH view, the SDH expansion provides the following applications
in the XMP1 system:
• STM-1/4 Terminal Multiplexer for 64 kbit/s connections up to STM-1
connections
• STM-1/4 Add/Drop Multiplexer for 64 kbit/s connections up to STM-1
connections
• Transparent transmission of 2 Mbit/s signals
XMP1 with SDH expansion is primarily used in networks with 64 kbit/s
connections where line interfaces with STM-1/4 access are required.
3.1.1 Applications
Terminal Multiplexer
When used as Terminal Multiplexer, the XMP1 system provides one
STM-1/4 Aggregate interface (or two with Dual Homing). The XMP1 PDH
kernel offers 64 kbit/s switching options for up to eight E1 interfaces
(internal interfaces). Also see Fig. 3.1.
Add/Drop Multiplexer
When configured as Add/Drop Multiplexer, the system can be used in single
or double rings. In addition to the same scope of PDH switching options as
provided by the Terminal Multiplexer, the system can offer SDH Tributary
interfaces in single rings. Also see Fig. 3.1.
Transparent 2 Mbit/s transmission
The SDH expansion also supports a transparent transmission of internal
and external 2 Mbit/s signals.