Siemens announces new ISDN data access controller which enables data transfer between ISDN and analog worlds.

CUPERTINO, Calif.--(BUSINESS WIRE)--April 8, 1996--Siemens Components, Inc. today announced the new ISDN Data Access Controller for Terminals (ISAR) for data communications.

The ISAR (designated number PSB7110) opens up analog fax and modem communications to ISDN (Integrated System Digital Network) subscribers. This device enables personal computer (PC) and PC card manufacturers to design cost-effective ISDN data access solutions which also seamlessly communicate with analog data terminals. A corresponding ISDN reference design is planned for equipment manufacturers.

In addition to allowing independent access to both data channels (B channels), the ISAR can also operate the control channel (D channel). The B channels can be used for asynchronous, HDLC, and binary transmission. The ISAR chip supports V.32bis modem transmission at 14.4 kbit/s, group 3 fax transmission (per V.17, likewise at 14.4 kbit/s), tone dialing using Dual Tone Multifrequency (DTMF), as well as V.110 bit rate adaption.

Using the ISAR and a range of other Siemens devices, a passive ISDN PC card (without microcontroller) can be easily produced. The ISDN reference design highlights the architectural possibilities for such PC cards. Connection to the four-wire S0 basic access is enabled by the ISDN Subscriber Access Controller (ISAC-S TE, designated PSB2186), while the ISDN Echo Cancellation Circuit (IEC-Q, designated PEB2091) provides access to ISDN two-wire U2B1Q interfaces.

The possibility of connecting analog terminal equipment, such as a telephone handset, is provided by the Audio Ringing Codec Filter with Enhanced Speakerphone Function (ARCOFI-SP, designated number PSB2163). The reference design also contains an ISA "Plug & Play" PC bus interface, as well as the ISDN software running under Microsoft Windows 3.1 and Windows 95.

The following protocols are supported for the D channel: E-DSS1 for Europe, 5ESS for the United States (AT&T), National ISDN-1 (US, Bellcore), and NTT for Japan.

The passive ISDN PC reference design permits the performance features made possible by the ISAR chip to be quickly and economically translated into customer implementations. Of course, the new chip can also be used on active ISDN PC cards (with microcontroller).

The ISAR chip is the newest addition to the Siemens ISDN chip family. It is to be supplied in the P-TQFP-100 package. Availability of samples as well as the ISDN reference design is anticipated in mid-1996.

For further information, please call 1/800-77-SIEMENS ext. 716 (ask for M12P035).

Siemens Components Inc. (SCI), with its headquarters in Cupertino, is a leading supplier of high-technology electronic products for automotive, communications, consumer electronics, data processing, PC peripherals, embedded control, and memory markets.

SCI is part of the Siemens Semiconductor Group, which has its headquarters in Munich, employs 15,900, and had worldwide sales exceeding $2.9 billion in the 1994/95 fiscal year. SCI's website is located at http://www.sci.siemens.com -0-

Note to Editors: ISAR, ISAC, and ARCOFI are registered trademarks of Siemens AG. Windows and Windows 95 are registered trademarks of Microsoft Corp.

CONTACT: Siemens Components Inc.

Jean Stawarz, 408/777-4909

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