ADTRAN announces Rackmount ISDN Service Unit at COMDEX.HUNTSVILLE, Ala.--(BUSINESS WIRE)--Nov. 10, 1994--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, has developed the 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) 128 Rackmont, an intelligent ISDN ISDN in full Integrated Services Digital Network Digital telecommunications network that operates over standard copper telephone wires or other media. Service Unit with integrated network termination, providing data transmission rates of up to 128 kbps. ADTRAN will unveil the new unit at the fall COMDEX The former, premier computer trade show in the U.S. Although it grew into an end user event, it was originally created for dealers and distributors (it was the COMputer Dealers EXposition). trade show in booth number I-100. The ISU 128 Rackmount is designed for use in the ADTRAN SMART 16 Shelf, providing convenient mounting for up to 16 communication devices. Designed for larger host site areas, the Shelf has an intelligent controller card designed to configure and control the card units installed in the shelf and up to 15 additional shelves. The SMART 16 Shelf can house a variety of products including ISUs, DSU/CSUs and T1 CSU/DSUs. The ISU 128 Rackmount can be viewed as an ``ISDN modem'' allowing cost-effective high-speed data transmission using standard ISDN Basic Rate service. The ISU 128 Rackmount interoperates with Switched 56 DSUs as well as various ISDN terminal adapters and Inverse Multiplexers. The unit is optionally equipped with V.32 bis/V.42 bis modem interoperability. ``The ISU 128 Rackmount installed in a SMART 16 Shelf satisfies those applications where multiple communications devices are required at a central site, such as modem pooling, internet access, and host data center applications,'' ADTRAN ISDN Product Manager Leslie Conway said. ``Because the ISU is designed to interoperate with analog modems, Switched 56 DSUs, ISDN terminal adapters and other ISUs, the central site can now use one system to serve users' various communications needs.'' Price & Availability The ISU 128 Rackmount is priced at $920 and is available immediately. The ISU Rackmount with V.32 bis/V.42 modem will be available in the first quarter of 1995. The SMART 16 Shelf is priced at $1,295 and is currently available. Technical Details This unit is an ISDN terminal adapter and is available with an optional integrated NT1. The ISU 128 transmits data over an RS-232, V.35 or RS-530 interface and performs at synchronous data Synchronous data Information available at the same time. To test option-pricing models, the price of the option and of the underlying should be synchronous and reflect the same moment in the market. 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 the SMART 16 Shelf controller card, which can be configured two ways: through the use of an RS-232 port providing a VT-100 compatible ASCII terminal interface or by using Datamate, an optional hand-held control unit providing a 2x16 LCD display and key pad. For network testing, the ISU 128 Rackmount 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. Today 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 and supplies HDSL See DSL. HDSL - High bit-rate Digital Subscriber Line products to Regional Bell Operating Companies and many well-known OEMs. The broad selection of customer premises 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 information regarding ADTRAN and its products, call 1-800-326-7300. CONTACT: ADTRAN Inc., Huntsville
Stacy Thomas, 205/971-8488
Leslie Conway, 205/971-8729
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