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NEW PRODUCT NEWS—edited by Harv Weiner

ISDN Terminal Adapters

Xecom has announced two modular terminal adapters that enable equipment designers to include ISDN access into a design with the addition of a single component. Available for both the European S/T interface and the North American U interface standards, the adapters use channel bonding techniques to provide a full 128-Kbps digital channel in synchronous mode. Applications include high data-rate process monitoring and control, compressed or slow-scan video, network monitoring, high-quality audio transmission, remote LAN access, and Internet/lntranet access.

The XEISDNB is an ISDN terminal adapter with integral NT1 (U interface). It implements 2B1Q encoding per ANSI T1.601 for the North American standard interface and is compatible with all standard ISDN central office switches. The setup of ISDN switch parameters and module configuration is implemented through an extended AT command set, setup menus, or preset configurations built into the firmware and accessible through the RS-232 port. Special designer-friendly features include an ISDN monitor function with 15 designing, downloading, and debugging commands to simplify custom firmware design by the equipment maker and 256K ý 16 flash memory for firmware update flexibility.

Both the XEISDNB and S provide a serial data channel capable of 1200 to 128,000 bps synchronous or 300 to 115,300 bps asynchronous data rate over a single ISDN connection (two bonded B-channels). Multi-link PPP (point-to-point protocol), asynchronous inverse multiplexing (AIM), and synchronous bonding protocol are implemented within the modules to enable the user to choose a protocol compatible with his system architecture. The user data interface is a standard 5-V level RS-232 serial port configuration. 12-V RS-232 drivers may be added externally if desired.

The XEISDNB sells for $279 and the XEISDNS sells for $259.

Xecom, Inc.
(408) 945-6640
Fax: (408) 942-1346
www.xecom.com

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