DSC unveils new wireless solutions at CTIA Wireless '96.

DALLAS--(BUSINESS WIRE)--March 25, 1996--DSC Communications Corporation announced today that it is exhibiting a variety of new product solutions for the wireless marketplace at this year's CTIA Wireless '96 show in Dallas. DSC is demonstrating these and other advanced systems in booth No. 2411 at the March 25-27 show.

Several of DSC's newly unveiled products include solutions for switching within the wireless network. Among these are:

o DSC's A-INfusion(TM) Home Location Register (HLR): DSC designed its new HLR system to support the needs of the wireless intelligent network. DSC's HLR system is available in two variations: the A-INfusion HLR/GSM (for use in the world's GSM networks) and the A-INfusion HLR/IS-41 (which serves cellular and personal communication services [PCS] networks).

The A-INfusion HLR/GSM has the capacity to serve 2 million subscribers and can support up to 20 Mobile Switching Centers (MSC). This product is currently in place in an Asian GSM network, where DSC's systems are supporting 3 million subscribers and 9,000 transactions per second (tps).

The A-INfusion HLR/IS-41 system supports up to 2 million subscribers and complies with the TIA IS-41 Rev. B standard. The system's current capacities are 200 transactions per second (tps).

o The STP(II) Platform: This signal transfer point (STP) system combines the newest hardware and software features of DSC's MegaHub(R) STP products into a small, powerful platform. DSC's MegaHub STP product line provides fast packet switching of SS7 messages for basic and advanced telephone services such as call set-up, Caller Name and Caller Identification, Toll Free Services (800-, 888-, Freephone) and access to HLR and VLR databases.

The new STP(II) can be deployed with as few as 16 signaling links in a single cluster configuration, yet can easily be upgraded to 200 links or more with an in-service conversion to the Macro STP platform. Such modularity makes DSC's STP(II) a highly flexible solution, capable of on-line expansion with no interruption to service. The STP(II) software is the same rigorously tested software used on the existing Macro STP product, the most widely deployed stand-alone STP product in the United States.

Included in the STP(II) deployment options is the STP-W/2: DSC recently introduced this economical switching system, which was designed for wireless and small network service providers. The STP-W/2 allows deployment of SS7 messaging with an expansive number of features and enhancements.

Visitors to DSC's CTIA demonstration will also find new solutions for their wireless network transmission needs, including:

o The New STS-1 Interface for the DSC DEXCS: This enhancement to the DSC DEXCS establishes the product as the world's first and only Synchronous Optical Network (SONET) narrowband cross-connect. The STS-1 interface is the first phase in DSC's SONET migration plans that will provide next-generation interfaces on the DSC DEXCS. This new interface can be provisioned flexibly as a DS3 or as an STS-1 that supports both DS3 and VT1.5 mappings. This allows customers to deploy the STS-1 interface as a DS3 termination that will easily migrate to SONET as their network evolves.

The STS-1 interface also provides a cost-effective alternative to multiple DS1 terminations and allows the DSC DEXCS to be used in both narrowband and wideband applications. Future enhancements will also allow for VT1.5 intact cross-connections and ESF/FDL performance monitoring on embedded DS1s.

o DSC's transDX(TM): This new mini-cross-connect system is DSC's latest offering in transcoder products. The transDX is a two-to-one transcoder/1/0 cross-connect system capable of bringing true time slot interchange (TSI) grooming functions to any site, no matter how small or remote. The transDX features a TC221 ADPCM transcoder and a DX-4 four- port cross-connect module housed in a compact, 19-inch shelf that is only 1.75 inches in height.

The new product is an ideal solution for small-capacity applications requiring add-drop multiplexing, 1/0 cross-connect functions or automatic switching of critical information. This includes cell sites or mobile data base-stations.

o DSC's mircoDX(TM): Also a mini-cross-connect system, the microDX brings full timeslot interchange functions to small sites where space and power are limited. This digital cross-connect system can be equipped with up to eight interface boards, using any combination of T1, E1 and V.35 interfaces.

DSC's microDX is cost-effective solution geared for cell site and small hub site applications within the wireless telephone network. For instance, at remote hub locations, the microDX can reduce T1/E1 facility costs by grooming partially filled incoming T1/E1 facilities, so that a lower number of outgoing facilities are leading back to the switching center.

o PureTone(TM) DSE: This new system combines traditional echo cancellation features with DSC's new Dynamic Speech Enhancement (DSE) module to provide superb speech quality. The PureTone DSE constantly monitors the network quality, enabling and disabling the DSE feature accordingly.

The DSE module digitally compensates for transmission losses in the lower frequencies and produces warmer, more lifelike speech. It also automatically adjusts the voice signal level on a per call basis, giving speakers the feeling they are very close, regardless of distance.

DSC Communications Corporation is a leading designer, developer, manufacturer and marketer of digital switching, transmission, access and private network system products for the worldwide telecommunications marketplace.

NOTE: MegaHub is a registered trademark of DSC Communications Corporation. A-INfusion, transDX, microDX and PureTone are trademarks of DSC Communications Corporation.

CONTACT: Terry Adams, DSC Communications Corporation,

214/519-4358