System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Network Control Using ServiceOn Access
Aastra Proprietary Information Page 7-1
Chapter 7
Network Control Using ServiceOn Access
The present chapter describes how XMP1 can be controlled and monitored
by the ServiceOn Access Network Management System.
For more detailed information, please refer to the Operator Manuals for
ServiceOn Access and the Operating Instructions for the SOX MSP
Software.
The XMP1 Flexible Multiplexer can be connected to a TMN in different
ways. One of them involves the connection to a SISA network. This
technology described below has been used since several years.
7.1 Introduction to the SISA Network
The SISA network (Supervisory and Information System for local and
remote Areas) is used for information exchange (alarms, commands,
measuring values etc.) between transmission systems and an operating
system. In conjunction with XMP1, the ServiceOn Access Network
Management System from Ericsson is used.
Messages from local or remote transmission systems, i.e. the so-called
network elements (NE) are transmitted to the ServiceOn Access
workstations. Moreover, information (e.g. control commands, requests etc.)
are sent out by the ServiceOn Access Network Management System to the
network elements. Thus, the individual network elements can be controlled
and monitored.
A SISA network (DCN=Data Communication Network) always has a tree
topology based on the master/slave principle and is hierarchically
structured. This hierarchical structure is set up using concentrators.
Fulfilling a master function, concentrators permit the connection of further
network elements (slaves). Regarding the structure, slaves are located
directly below the associated master. A slave - working as concentrator -
can act in turn as master for the next lower level. This principle results in the
tree structure mentioned above. This tree structure can be composed of up
to nine hierarchy levels. Thus, a concentrator works as both master and
slave, i.e. within the hierarchy it acts as slave in the upward direction and as
master in the downward direction.
Concentrators can be implemented either on a hardware (SISA-K) or
software basis. The latter are referred to as virtual concentrators (SISA-V).
The individual slaves are physically connected to the QD2int bus specified
according to RS485 and operating at a bit rate of 64 kbit/s. This bus is
appropriate for connecting up to 30 network elements.