Basic DCN principles
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Purpose
A
data communication network (DCN) is used for the exchange of management data.
This section provides an overview of the data communication network and describes
the type of communication between the nodes in the network and the protocols used.
SDH management network
The SDH management network is an overlay of the transmission network. The
management system (for example Lucent OMS) and the network elements (NEs)
together are the nodes of this network. The 10/100BASE-T interface and
data
communication channel (DCC) provide the physical connection between the nodes.
DCN physical components
The figure below illustrates a data communication network (DCN) as defined by the
Open Systems Interconnection (OSI) model. This figure refers to the physical
components and connections in the DCN. It does not give information about the logical
configuration of the DCN.
The figure shows three LANs and a number of DCC channels in an SDH transmission
network with point-to-point configuration and two rings connected to a management
system, for example Lucent OMS. The management system is connected to the
transmission network via
gateway network elements (GNE) by the LAN. The network
elements are connected to each other by DCC channels.
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