ADTRAN Offers ISDN Service Unit Perfect for Work-at-Home Applications at Interop.LAS VEGAS--(BUSINESS WIRE)--March 28, 1995--ADTRAN, Inc. (NASDAQ NASDAQ in full National Association of Securities Dealers Automated Quotations U.S. market for over-the-counter securities. Established in 1971 by the National Association of Securities Dealers (NASD), NASDAQ is an automated quotation system that reports on :ADTN ADTN Administrative Data Transmission Network ADTN Administrative Data Telecommunications Network ), a leading supplier of voice and data communications products, will demonstrate its recently introduced (November '94) ISU ISU Iowa State University ISU Issue ISU Idaho State University ISU Illinois State University ISU Indiana State University ISU International Skating Union ISU International Space University ISU I-Shou University (Taiwan) Express, a low-cost solution for working at home, at NETWORLD+INTEROP INTEROP Interoperability INTEROP Interoperational . The ISU Express can be viewed as an "ISDN modem", combining voice and data transmission at up to 64 kbps and data-only at rates of up to 128 kbps. Using one ISDN ISDN in full Integrated Services Digital Network Digital telecommunications network that operates over standard copper telephone wires or other media. line, this unit will support multiple connections, eliminating the need for 2 conventional phone lines to conduct telephone, fax and computer networking activities. "This unit is perfect for remote access. It is also ideal for students or executives who want to access bulletin boards and the Internet while taking advantage of high-speed file transfers at up to 128 kbps,'' ADTRAN ISDN Product Manager Leslie Conway said. "The ISU Express is designed to address the needs of those wanting the speed and cost effectiveness of ISDN service." Available Options The full-featured version of the ISU Express will include a Plain Old Telephone Service (POTS) interface option and an integrated modem. The POTS interface option will allow the connection of a computer as well as a telephone and/or fax machine to a single ISDN line. While a phone or fax call is in progress, data is transferred at a rate of 64 kbps. If there is no telephone call in progress, data can be sent at rates of up to 128 kbps. The Express will also be available with an integrated V.32 bis/V.42 bis modem option for situations when the user is transmitting to a receiver that is not equipped with ISDN service. This allows the ISU to communicate not only with ISDN or switched 56 devices, but also with analog modems. Price & Availability Four versions of the unit will be available in March '95: data only for $640, POTS interface version for $790, integrated modem version for $990, and POTS interface with an integrated modem for $1,140. Technical Details From the network, ISDN is delivered by a single 2-wire U-Interface which is connected directly to the ISU Express. This unit is an ISDN terminal adapter A device that adapts a computer to a digital ISDN line. Like a modem, it plugs into the serial port of the computer or into an expansion slot. Some terminal adapters use the parallel port for higher speed. with an integrated NT1, thus eliminating the need and expense of an external NT1. The ISU Express transmits data over an RS-232 interface and performs at synchronous data transfer rates from 2400 bps to 128 kbps and asynchronous Refers to events that are not synchronized, or coordinated, in time. The following are considered asynchronous operations. The interval between transmitting A and B is not the same as between B and C. The ability to initiate a transmission at either end. rates from 300 bps to 115.2 kbps. Configuration of the unit is achieved using a VT100 menu system and AT commands. Dialing is initiated in-band over the RS-232 interface using AT commands, V.25 bis or using DTR (Data Terminal Ready) An RS-232 signal sent from the computer or terminal to the modem indicating that it is able to accept data. Contrast with DSR. DTR - Data Terminal Ready assertion. For network testing, the ISU Express responds to loopback commands from the telephone company central office. Company Overview ADTRAN was established in 1985 to design, develop and manufacture advanced transmission products for high-speed digital communications. In addition to its HDSL See DSL. HDSL - High bit-rate Digital Subscriber Line products, ADTRAN is the primary provider of DDS (1) (Digital Data Storage) See DAT. (2) (Data Dictionary System) See QuickBuild and OpenDDS. (3) (Dataphone Digital S and ISDN digital loop products to Regional Bell Operating Companies and many well known OEMs. The broad selection of customer premise products offered by ADTRAN includes a complete line of DSU/CSUs, a variety of ISDN extension and network terminating products and flexible T1 multiplexers. For more information regarding ADTRAN and its products, call 1-800-326-3700, fax 205/971-8699, or e-mail: info@adtran.com. CONTACT: ADTRAN, Inc., Huntsville Media Relations: Stacy Thomas, 205/971-8488 Product Manager: Leslie Conway, 205/971-8729 |
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