Examples of DECT networking within the public network

WLL systems offer a wide range of services for users with stationary terminal devices, as well as local mobility for the users of mobile equipment. The application-specific characteristics of the cellular networks and cordless networks are utilized to an optimum extent where dual-band handsets and dual-mode handsets are used, ensuring that a mobile subscriber can always be reached at the most reasonable rate.

While a dual-band handset is used within two cellular networks, a dual-mode handset can be used for applications within one cellular network and one cordless network. Such criteria as the convergence of fixed networks and mobile radio networks, extension of network capacity, mobile radio for private users, EU directives and deregulation of the telecommunication market are leading to the integration of DECT with GSM in the form of dual-mode handsets.

Applications for Dual-Mode Handsets
DECT and GSM are global standards, which apply to a wide product spectrum, including cordless telephones, mobile telephones, GSM data modules for data transmission and telemetry, as well as WLL products, GSM systems, IN system components and IN services within GSM, PCS, wireless PBX and MODACOM servers.

Dual-mode handsets can be implemented and used within the DECT campus sector (connected to the PBX) at home, connected to the public network (PSTN, DECT sector), and on the road (GSM). Apart from voice communications and applications via DECT and GSM, data communications are also offered via mobile networks (DECT, GSM, MODACOM, MOBITEX) and fixed networks (ISDN, X.25 LAN, PSTN).

Dual-mode handsets integrate mobile hand-helds with cordless telephone

User Benefits
Mobile products and solutions will ensure that the user can be reached for voice, data and image communications at any location with DECT, WLL and GSM. A specific user can be reached reliably and quickly, irrespective of location, terminal device and network with one number service.

Applications based on GSM, DECT-GAP and DECT-WLL enable full-coverage availability at home (DECT connected to the public network), in the office (PBX with cordless telephone) and in the public sector (DECT-WLL). Dual-mode terminal devices extend the local mobility of cordless DECT through the global mobility of GSM. Global availability therefore grows together with the service features of the PBX. As far as the user is concerned, the most important benefits are location-independent availability and the safeguarding of investments by using existing infrastructures (PBX, LAN) and equipment.

Application scenario for the marriage of various telecommunication systems.

Toward the Universal Mobile Network
The market for mobile communications is growing at an above-average rate, as is the proportion of that market represented by data communications. Interesting mobility applications for voice, data and image are available today, based on existing networks. These are being expanded continuously and adapted to future standards.

Interworking between DECT, GSM and fixed networks plays an important role with respect to optimum utilization of the service features offered by various networks. The resources and mobility functions of different networks are at the user's disposal as a result of this. GSM and DECT will merge to produce the UMTS over the long run. Apart from the integration of DECT and GSM, the multi-band and multi-mode handset will play a significant role along this road. The significance of mobile data communications is increasing continuously with regard to applications (teleworking, mobile office, telemetry), multimedia terminal devices (PIC/PDA, remote Internet access), and networks.