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Interphase Announces Enhanced ATM Software Driver Featuring Additional Enterprise Level Functionality.

DALLAS--(BUSINESS WIRE)--Sept. 15, 1998--

Redundant Link Support, SSRP Support and Data Direct VC Management Help Insure Failure-Proof Network Connectivity

Interphase Corporation (NASDAQ/NMS: INPH), an international supplier of network connectivity solutions, today announced the availability of an enhanced driver for the company's line of high performance ATM adapters. The new Integrated Driver version 1.2 (ID 1.2) enables new functionality which is particularly beneficial for enterprise networks including redundant link support, data direct virtual circuit management, SSRP (Simple Server Redundancy Protocol) support, and support for ATM Forum UNI 4.0 Signaling.

ATM is a communications protocol that effectively integrates the transport of voice, video and data - each of which requires different levels of quality of service. Because it supports multiple existing protocols (such as Ethernet, Token Ring and FDDI), ATM is experiencing broad acceptance as a multi-service enterprise backbone technology to consolidate LAN traffic and to aggregate enterprise information for connectivity to wide area networks (WANs) or virtual private networks (VPNs).

"While the need for more capacity within their networks typically remains the top concern for most IS managers, emerging real-time voice and video applications are presenting complex QoS (quality of service) challenges for enterprise backbones," said Greg Kalush, Interphase vice president of sales and operations. "As a result, many organizations are turning to ATM as their core network architecture to support delay-sensitive applications like LAN telephony and desktop videoconferencing."

Failure-proof Network Connectivity

The new ID1.2 software provides a number of enhancements designed specifically to protect against network downtime, thereby allowing network managers to build fault tolerance and redundancy into their network design.

"Obviously, network availability and reliability are of paramount importance for network backbones and in the support of mission critical applications," Kalush continued. "Quality of service and increase bandwidth mean very little if end users are unable to connect to their network. The feature/functionality of ID1.2 enables the fault tolerance required to keep the enterprise connected should a failure of some type occur within the network."

Features in ID1.2 which help provide failure-proof network connectivity include:

-- Redundant Link Support - This feature allows user to define a

secondary adapter as a backup for primary cards. Should a

physical line failure occur, the secondary adapter automatically

becomes active, keeping the user connected to the network.

-- Data Direct VC Management - Through the use of the CellView(TM)

Connectivity Management application that comes standard with

Interphase ATM device drivers, a user can specify that Data

Direct virtual circuits will not be released if LANE services are

lost. Without Data Direct VC Management, if the LANE server goes

down, the user's connection is automatically severed.

-- SSRP Support - Simple Server Redundancy Protocol is a LAN

Emulation-based software protocol implemented in Cisco ATM

networking products that provides redundancy for all server

components in an ATM network running LAN Emulation. Support for

SSRP in ID1.2 allows Interphase ATM adapters to utilize this

additional level of fault tolerance in Cisco-based networks.

Support for UNI 4.0 Signaling

The new version of the Interphase Integrated Driver supports ATM Forum UNI 4.0 Signaling and associated services. UNI (User-to-Network Interface) is the set of specifications from The ATM Forum which defines the interface between user ATM equipment (e.g. servers) and private or public ATM network equipment (e.g. ATM switches). Support for UNI 4.0 is crucial for enterprise level connectivity because it enables the use of ABR (Available Bit Rate) traffic management and provides the foundation for other ATM Forum specifications such as LAN Emulation 2.0, MPOA (Multiple Protocols Over ATM) and Voice/Telephony Over ATM (VTOA).

In addition to UNI 4.0, the ID1.2 driver also supports UNI 3.0 and UNI 3.1 signaling types. Support for multiple signaling schemes is important to insure that Interphase products will be interoperable with other ATM devices, regardless of the type of signaling utilized by the networks in which they are installed. Additional signaling-related support included with the ID1.2 driver release includes:

-- ILMI 4.0 Auto-Configuration - The auto-configuration provided by

the ID1.2 driver utilizes ATM's Interim Local Management

Interface to enable the system to query the ATM switch on initial

start-up and "synchronize" to the highest revision signaling

available to both the system and the switch. This eliminates the

need for network administrators to perform UNI version

configuration at set-up. However, CellView provides the network

manager a simplified method to manually configure a specific UNI

version at set-up if desired.

-- Dynamic Signaling Management - ID1.2 allows the user to

dynamically reconfigure or disable signaling for each adapter and

initiate the new configuration without the need to reboot the

system or restart the signaling module. This simplifies and

expedites the process of reconfiguring UNI signaling without

system or network interruption.

Additional Integrated Driver 1.2 Features

There are numerous other features provided by the ID1.2 release which enhance overall network efficiency or simplify network management, including:

-- Support of 16 LANE Clients - The ID1.2 release increases the

number of LANE clients supported on a single adapter to 16. This

is beneficial in a mixed protocol environment because it allows

the network manager to assign a system to a greater number of

emulated LANs, minimizing the need to send traffic through a

router and increasing network efficiency.

-- Configuration of SONET or SDH - The ID1.2 release allows the user

to configure whether synchronous frame interfaces support either

SONET or SDH framing on a per adapters basis. This can be

configured at either install time or later via CellView.

-- Support up to 4K VCs - ID1.2 provides simultaneous support for

over 4000 virtual circuits. This provides the increased capacity

required by many enterprise servers that must provide scalable

connectivity in large ATM campus networks or backbones.

-- Dynamic Client Management - This feature allows the network

manager to start, stop, and reconfigure clients via CellView

without the need to reboot the system. This is extremely

beneficial to network managers building virtual networks as it

allows new users to be added or removed to various emulated LANs

without network or system interruption.

Supported Platforms and Availability

The ID1.2 driver comes standard with Interphase ATM adapters and is available immediately for systems running Windows NT, Solaris and NetWare operating systems. Support for HP-UX is expected for general availability within the next 60 days. Current Interphase ATM adapter customers can receive the updated driver at no additional cost by downloading it from the customer support section of the Interphase web site at

About Interphase Corporation

Interphase Corporation (NASDAQ/NMS: INPH) is a leading international supplier of reliable connectivity solutions for enterprise network applications requiring high-speed LAN, high capacity storage, remote access and WAN communications. The company's broad product line includes performance-proven adapters, switches and associated software for ATM, FDDI, Fast Ethernet, Fibre Channel, ISDN, and synchronous communications utilized in enterprise networks and embedded applications. Interphase products are designed for reliable performance in mission critical environments and are backed by ISO 9001 manufacturing excellence and comprehensive customer support programs. Additional information about Interphase and its products is available through the company's web site at

CellView is a trademark of Interphase Corporation. Windows NT is a trademark of Microsoft Corporation. Solaris is a trademark of Sun Microsystems. NetWare is a trademark of Novell. All other trademarks are property of their respective owners.

CONTACT: Interphase Corporation

Michael Eckley, 214/654-5325 (Trade contact)


Interphase Corporation

Greg Kalush, 214/654-5000 (Investor Contact)


Meltzer & Martin Public Relations

Larry Meltzer, 214/953-0808 (Investor Contact)
COPYRIGHT 1998 Business Wire
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Publication:Business Wire
Date:Sep 15, 1998
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