TetraFlex Enhanced Bridge
Designed as a comprehensive network interconnection tool, the DAMM TetraFlex Enhanced Bridge can be used as an Inter-System Interface (ISI). It enables interoperation with foreign systems or migration of terminals from foreign systems to a DAMM system and the other way around.
Key features
Designed for three bridging scenarios:
- Connection of DAMM TetraFlex networks to:
- TETRA networks from other manufacturers
- Networks operating in different frequencies
- Networks operating in different technologies
- Migration of terminals to and from different TETRA systems
- Representation of terminals that are switched on in a foreign TETRA system
Bridged communication – the traditional DAMM way
In the traditional group bridging setup, terminals remain in their own networks, but can engage in group voice communication with terminals from a foreign network. Group communication is ensured using one radio modem per group. Using radio modems, DAMM TetraFlex networks can be connected to TETRA networks from different manufacturers and even networks operating in different frequencies or technologies.
This setup also allows group SDS in TETRA.
Bridged communication – the enhanced way
The DAMM TetraFlex Enhanced Bridge also enables individual communication between terminals in the DAMM network and terminals in foreign TETRA networks. The system detects terminals from the foreign network when these migrate to or are switched on within the DAMM network. A TETRA modem ensures that a virtual subscriber is established in the foreign network using the same ISSI number. The modem assignment is handled within a table in the DAMM TetraFlex Enhanced Bridge software and is based on priorities and vacancies.
Maximum flexibility and user friendliness

As soon as a terminal returns to the foreign system to which it belongs or when it is switched off within the DAMM network, it will be deregistered in the DAMM system. This means that the virtual subscriber which had been allocated to it will be freed up for use by another terminal.
The registering and deregistering process that happens when the terminal migrates between the networks happens smoothly and will not be noticed by the user. Both the look of the terminal interface and all operations will remain unchanged.
Benefits of an IP network

Since all connections to the DAMM TetraFlex network are pure IP, the TETRA modems and virtual TETRA modems can be placed anywhere. This means that the load on the air interface can be reduced because the modems can be distributed.
Additionally, the DAMM IP network works according to the TETRA standard and is thus independent of the feature set and software status of the existing system – this is superior to any standard ISI solution available on the market.
