User's Manual

Table Of Contents
DIB-500 R4.1 Product description
Constituents
52 Installation, Operation and Service Manual 90DIB500R41IM_FCC02 99.1
IP Switch (IPS)
The IP Switch (IPS) is a software component. It serves for distributing TETRA voice
data between software components and to external applications (optional) and is thus a
central control component of the network element.
The TETRA voice data are received in the form of IP data packages. The received IP
data packages information facilitating the routing of the IP data packages in addition to
the TETRA voice data. The IPS is controlled by the Core Operation Server (COS) soft-
ware component via the PUC Switch (Processing Unit Controller, PUC) protocol. The IP
data packages are transferred by the IPS via point-to-point connections ("Unicast").
Network Element Manager (NEM-523)
The Network Element Manager (NEM-523) is a software component and part of the
Network Management System of ACCESSNET
®
-T IP. It administers the network ele-
ments and enables access to the network components of the TETRA infrastructure
installed in it.
In addition, the NEM-523 performs operative functions such as the redundancy man-
agement: if specific network resources are temporarily unavailable, the application will
control the software component by switchover to standby resources.
The NEM-523 is responsible for management functions, and controls downloads as well
as the distribution of network resources. The NEM-523 is the remote station via which
the NMC-522 DownloadManager communicates while downloading software or a con-
figuration. It is responsible for properly enabling a configuration or software and for a
fallback to the previous configuration or software version in the case of faults.
Packet Data Server (PDS)
The Packet Data Server (PDS) is a software component and provides the packet data
service. The packet data service enables an efficient transmission of packet data
between mobile stations within an ACCESSNET
®
-T IP network and to externally con-
nected IP networks. In this case, the PDS is the access point to one or several networks
of user organisations for mobile stations in the ACCESSNET
®
-T IP. For this purpose,
the PDS provides an IP gateway (Access Point Gateway, APG) for each user network,
whereby a user network is always mapped by an APG and identified by a unique
Access Point Name Index (APNI).
Due to the use of virtual networks (Virtual Private Network, VPN), the operation of multi-
ple user organisations is possible in one mobile network independently of one another.
Via IP gateways (Access Point Gateways [APG]), access to IP networks can be admin-
istered subscriber-specifically with the aid of the network management client NMC-512
SubscriberManager to configure the use of Internet and Intranet.
The packet data service can coexist with existing calls and Short Data Services (SDS)
of the ACCESSNET
®
-T IP. Depending on the mobile station used in each case and the
configured call priorities, the packet data transmission is not interrupted by calls.
The Packet Data Gateway (PGW) or the PDS can be operated redundantly to increase
the availability. With this type of characteristic, the ACCESSNET
®
-T IP network gener-
ally contains two PDS on different network elements. Up to three PDS are currently
being supported for each ACCESSNET
®
-T IP network.