News Release

Telco Systems' EdgeLink100 Chosen by Cisco Systems

Product Will Be DS3 Option for Cisco's New AccessPath Model
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Jun 08, 1998

ATLANTA, GA -- June 8, 1998 -- Telco Systems, Inc. (NASDAQ:TELC), a leading provider of network access solutions, announced today that it has teamed with Cisco Systems, the worldwide leader in networking for the Internet. Cisco will jointly market Telco Systems' EdgeLink100 as the DS3 multiplexer to work with the new Cisco AccessPath-TS3 Model 531 introduced here today at Supercomm '98.

"We're very pleased that Cisco Systems will jointly market our newEdgeLink100 to be the DS3 option for its new AccessPath-TS3 solution forISP's ISDN delivery," said David Marble, vice president, product marketing."Our relationship with Cisco signifies that we have delivered a product that not only meets the high demand for compactness, but for reliability and hassle-free design as well, all of which were key Cisco requirements."

The EdgeLink100's plug-and-play architecture will allow Cisco customers toquickly install and turn-up a high speed DS3 network connection to theirAccessPath-TS3 cabinets. With the EdgeLink100 option, Cisco'sAccessPath-TS3 customers have the flexibility to expand services withoutexpanding cabinets or increasing costs for additional equipment to meet growingbandwidth needs.

Introduced in January, the EdgeLink100 maximizes DS3 bandwidth in thesmallest space (1.75"Hx19"WX12"D). It is only one rack unit high and occupiesless than one-third the space compared to traditional multiplexers with similarfunctionality. It also offers 1:1 redundancy at both high and low speeds. TheCisco AccessPath-TS3 is designed to accommodate an integrated EdgeLink100DS3 multiplexer for the North American market.

Customers will buy the EdgeLink100 through Telco Systems' sales channels,equipped with the cable harness required for the integration into the CiscoAccessPath-TS3 cabinet. A DS3 C-bit parity solution is available today. A P-bitparity (M13) system will be available in July 1998. Additional information isavailable at http://www.telco.com/AP-TS3.HTML.

About Telco Systems

Telco Systems' integrated access solutions -- that are deployed at the networkedge -- provide organizations with a flexible, cost-effective means of transmitting voice, data, video and image traffic over public and private networks. These products are used in a wide variety of applications by network service providers, such as interexchange carriers, local exchange carriers, government agencies, utilities and wireless providers, as well as by corporations around the world.

Cisco Systems

Cisco Systems, Inc. (NASDAQ:CSCO) is the worldwide leader in networking for the Internet. News and information are available at http://www.cisco.com.

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