LAS VEGAS, Nev. -- May 4, 1998 -- Toshiba Corporation and Cisco Systems, Inc. today announced the successful completion of interoperability testing of their label-switching technologies. The interoperability testing between Toshiba's Cell Switch Router (CSR) technology and Cisco's Tag Switching technology is expected to accelerate the standardization of Multiprotocol Label Switching (MPLS) within the Internet Engineering Task Force (IETF).

Interoperability testing between CSR and Tag Switching was conducted at the Cisco lab in Chelmsford, Mass. from February to April, 1998. The tests and related demonstrations included Toshiba's CSR products, the Cisco 7500 and 7200 series routers,

About Toshiba Corporation

Headquartered in Tokyo, Toshiba Corporation is a leader in information and communications systems, electronic components, consumer products and power systems. Among its achievements are the largest share of the world portable PC market.

Cisco Systems

Cisco Systems, Inc. (NASDAQ:CSCO) is theworldwide leader in networking for the Internet. News and information areavailable athttp://www.cisco.com.

BPX, Cisco, Cisco Systems, the Cisco Systems logo and LightStream are registered trademarks of Cisco Systems, Inc. in the U.S. and certain other countries. All other trademarks mentioned in this document are the property of their respective owners.

CSR, Cell Switch Router and the Cell Switch Router logo are trademarks of Toshiba Corporation in Japan and certain other countries.