Electronic Design

Converter Connects Modem-Based Devices To GSM/GPRS Networks

An innovative converter from eDevice allows devices previously plugged into the wired telephone network to benefit from the flexibility, mobility, and less expensive rates of a GSM/GPRS network. The Bridge130D avoids the cost of a GSM/GPRS upgrade—which may not even be available—for the existing device, enabling users to extend the life of expensive technological assets.

By migrating to GPRS, users can benefit from cellular coverage area, mobility, and adapted GPRS rates, compared to the public switched telephone network's (PSTN's) monthly subscription. It also simplifies the installation stage and the billing process and permits convenient incoming call support. This migration improves central server architectures by replacing racks of modems with high-bandwidth Internet links.

The Bridge130D is designed to work without requiring any changes on either the device or the central server. The cable that usually connects to the wall socket is plugged into the Bridge130D phone interface instead, while eDevice software installed on the central server provides TCP/IP support. Devices that normally connect to the PSTN/POTS (plain old telephone service) network can connect to the Bridge130D because it emulates the analog phone network with a Foreign Exchange Station (FXS).

The converter generates rings, dial tone, and power and extracts the data from the modem flow to transfer it over the GPRS link. The Bridge130D is based on the eDevice TCP/IP stack, including a Web sever and remote firmware upgrade support. The converter, which can be battery-powered, incorporates a quad-band GSM/GPRS module.

To learn more, go to www.edevice.com. Contact the company for price and availability information.

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