We firmly believe that Planex will be able to bring their
next generation of switch products to market faster by using our suite of
networking software modules," said Perry Constantine, President and CEO of
IP Infusion .

Except for the historical information contained herein, the matters set
forth in this press release, including without limitation statements regarding
the availability of the Riverstone 15100 and 15200 Ethernet Access Routers,
the features and pricing of the routers when they are made available, and
customers' plans to test and/or deploy the routers are forward-looking
statements within the meaning of the "safe harbor" provisions of the Private
Securities Litigation Reform Act of 1995.

mahdavi ginoza

PK) today introduced the newest members of its
Riverstone 15000 product line: the Riverstone 15100 and 15200 Carrier
Ethernet Access Routers. "This fills a significant gap in the industry,
bridging the features and functionality previously only available on high-end
edge platforms with a smaller , more cost-effective form factor," said Jeff
Fishburn, CTO of DynamicCity, operators of the UTOPIA network.

Riverstone Networks, Inc. These forward-looking statements
speak only as of the date hereof and are subject to risks and uncertainties
that may cause actual results to differ materially .

widjaja srisuresh

Planex is a publicly traded company listed on JASDAQ since July 2001(stock
code:6784).jp/

About IP Infusion

IP Infusion, a leading provider of intelligent network software for
enhanced IP services platforms, delivers IPv4 and IPv6 dual stack routing,
L2 and L3 hierarchical switching , multicast, MPLS, L2 & L3 VPNs, security
and QoS technology enabling equipment vendors to rapidly develop and deploy
solutions for the access, enterprise, telecom and provider edge markets.

guttman soif

In May 2005, by acquiring American
Megatrend Inc Japan, a developer of cellular phone related software, and
Tristar Inc. Such an operating system can increase routing reliability by a full
order of magnitude, according to a recent report by the consulting firm
Network Strategy Partners(1).
Available in fourth quarter 2005, the 15100 provides an Ethernet-optimized
alternative to Riverstone 's multi-service oriented RS 1100 and 3100.

zekauskas przygienda

Riverstone Introduces Ground-Breaking Ethernet Access Routers Extending 15000 Product Line

, a municipal service provider in England
plans to deploy the new routers.

heinanen ginoza

"With the growing complexity of switch
software it is essential to work with a proven solution such as IP
Infusion's ARS to meet market needs. has been manufacturing, developing, and selling
networking related devices making full use of the latest technologies since
its establishment in July 1995.

Priced significantly less than any comparable technology on the market
today, the Riverstone 15100 and the 10 Gig-E Riverstone 15200 extend the
industry-leading feature set of the 15008 Ethernet Edge Router into the access
layer, providing MPLS from the core to the network edge.
Riverstone 's Ethernet router portfolio uniquely delivers the reliability that
allows carriers to meet the triple play -- voice, video and data -- service
requirements of their customers in a cost-effective and scalable way.

widjaja mahdavi

"

"I am particularly pleased about the contribution that Planex will make to
IPv6 based network infrastructure.
"The irresistible price point, added capacity and reliability, and the
availability of both MPLS/VPLS downlinks and uplinks -- an industry first --
gives service providers greater freedom in designing their networks than ever
before.
Riverstone allows carriers to offer new services over existing revenue-
generating networks permitting them to evolve to a next generation Ethernet
infrastructure.

shepler guttman

This robust, high-performance software
offers IPv4/IPv6 versions of OSPF, BGP, RIP, and IS-IS routing protocols;
PIM-SM for IPv4/IPv6 and DVMRP multicast protocols; MPLS, BGP-VPN, VPLS,
RSVP-TE, DiffServ, CR-LDP, and Layer 2 VPN switching and signaling
protocols; Spanning Tree, Rapid Spanning Tree, Multiple Spanning Tree,
Bridging, VLAN, GMRP, GVRP, Link Aggregation , and Port Authentication Layer
2 protocols; virtual routing, and TCP/IP dual stack support.

Head Office: F Nissei Ebisu Bldg 2F. IP Infusion has taken a leadership
position in the growing IPv6 , virtualization, and high-availability network
equipment market.

heinanen docsis

Planex will leverage the complete range of ARS modules including
ZebOS Layer 2/3 routing, Multicast and MPLS.

"Planex has selected the ZebOS Advanced Routing Suite because of its high
quality, modularity and comprehensive IPv6 support. 16-3 Higashi 3-chome, Shibuya-ku,
Tokyo 150-0011 http://www. This unique capability at the network edge,
combined with the resiliency and traffic engineering attributes of MPLS, gives
service providers a truly carrier-grade Ethernet solution.

docsis srisuresh

, Carrier Ethernet pioneer
Riverstone Networks (OTC: RSTN.

zekauskas guttman

"

"We are very pleased that Planex has selected IP Infusion for their new
product line.

greenblatt guttman

(JASDAQ,6784), a leading networking device vendor based in Japan,
announced today that the next generation of IPv4/IPv6 Layer 2/3 switches
will be based on IP Infusion's Advanced Routing Software (ARS) product
suite. From low density hubs to
multi-port managed switches to cables, accessories and print servers,
Planex has a networking device for all types of environments at price
points that fit demanding IT budgets."
While service providers have been quick to embrace MPLS in the core and
aggregation layers of their networks, many have opted for other technologies
in the access layer to minimize their capital expenditure.
Like the RS family of routers, the expanded Riverstone 15000 product line
uses the Riverstone Management Center framework to deliver end-to-end OSS,
including device configuration, inventory management, and performance and
fault data collection.

aboba srisuresh

moats ippm

The introduction of these routers fulfills the market's previously unaddressed
need for a compact, fully-featured platform that extends the benefits of VPLS
as close to the service -users as possible.
Riverstone is demonstrating the new routers this week in Salt Lake City at
Broadband Cities 2005, an industry conference bringing together community
leaders from around the world interested in building municipal networks. Combined with line-rate
IPv6, multi-layer OAM and Hierarchical QoS, they play a key role in supporting
converged business and residential services , as well as VoIP and 3G wireless
infrastructure deployments.

villamizar ippm

"There has been a need for a solution like
this for a long time," said Henrik Bremerskov, Head of Technology, Updata. In doing so, they
have had to compromise network reliability, scalability, QoS and operations.

aboba srisuresh

"Operators are looking for reliability and performance at the access layer
that is comparable to what they enjoy at the edge and core, but without added
cost," said Stan Hubbard, Heavy Reading.

przygienda veizades

Both of
the new access routers support VPLS, RFC-2547 MPLS-VPNs, and Layer 3 routing
protocols including BGP, OSPF, multicast , and IS-IS. The company assumes no obligation to update
or revise these forward-looking statements .

guttman soif

Japan has been visionary in driving IPv6
adoption and we are proud that Planex switches based on IP Infusion's
market leading IPv6 software protocols will help achieve the goal of
creating a national IPv6 network," said Kunihiro Ishiguro CTO of IP
Infusion.

IP Infusion develops and markets its ZebOS family of advanced IP routing
suites, which are based on a unique, modular, multi -process architecture
featuring control-plane components that provide route redistribution and
conversion , management services, and an OS/processor abstraction layer for
routing and switching modules.

Planex Communications Inc.
Updata Infrastructure UK Ltd. These risks and
uncertainties include unforeseen delays in commercial release of the products,
costs to manufacture or procure components that could affect pricing,
development delays that could impact which features are available immediately
upon commercial release of the products, and future changes in customer
evaluation and deployment plans of which Riverstone is currently unaware,
along with those risks and uncertainties detailed from time to time in
Riverstone Networks' SEC reports, including the reports on Form 10 -Q and Form
8-K filed on September 2, 2004 .

bormann gellens

Planex Communications
Inc. "Planex' hardware and system expertise combined with their
outstanding sales organization will ensure that the new generation of
switches based on IP Infusion technology will be a huge success.

About Planex Communications Inc. Enterprises and small / medium businesses
can rely on Planex for all their networking needs. For more information about IP Infusion, please visit
www.ipinfusion. The two new MPLS-based Ethernet routers tear down the
barriers to mass carrier Ethernet deployments by giving Tier One carriers and
competitive service providers the high reliability and scalability needed to
successfully deliver next generation business and residential triple play
services in a high quality, low-cost platform. "Compact and affordable MPLS / VPLS
access solutions can be particularly liberating for small service providers
and municipal network operators for whom the cost barrier is
disproportionately high.

rpsl bormann

We expect that by
leveraging IP Infusion's advanced software, we can reduce our development
cost and at the same time focus our resources on developing value-added
functionality rather than standard routing protocols," said Katsuaki Kubota
of CEO for Planex Communications.

shepler senie

We are excited about the possibilities
that the software suite provides for our next generation of switches
targeted at the Japanese market.
Riverstone is the platinum sponsor of this DynamicCity event and will be at
the heart of the conference's network, demonstrating the UTOPIA network and
allowing attendees to experience the power of carrier Ethernet first hand.

ginoza bormann

com

romascanu mahdavi

planex. The end-to-end
solution gives service providers the ability to maintain a single operational
model as well as mix-and-match VLAN and MPLS access technologies, helping
optimize functionality and cost in both large and small network deployments.

guttman shepler

, a sales agency of cell phone utility software, Planex has
started building new markets by merging the network and the cell phone. IP
Infusion has developed modular and distributed network software solutions
providing equipment vendors with building blocks to rapidly create modular
and scalable high-performance solutions around best-of-breed network
hardware and operating systems .com. Riverstone 15100 and 15200 Tear Down Barriers to Mass Carrier Ethernet
Deployments

SANTA CLARA, Calif. The 15200 extends this by supporting dual 10 Gig-E uplinks.

Riverstone Contact:
Amy Huitt
Riverstone Networks
1-408-878-6918
ahuitt@riverstonenet.

ippm ginoza

PRESS RELEASE Planex Communications Selects IP Infusion Software Technology for Next Generation IPv4/IPv6 Layer2/3 Ethernet Switches

co."
UTOPIA, a municipal FTTx network in Utah, is planning to trial the
Riverstone 15100 and 15200. "We believe
these new routers have great potential."
Like the 15008, the newest members of the 15000 family are equipped with a
modular operating system to dramatically reduce router software outages and
reboots . It
supports up to 20 triple-speed copper or fiber downlinks, and four Gig-E
uplinks. is a leading provider of carrier Ethernet
infrastructure solutions for business and residential communications services.com

Agency Contact:
Natalie Godsell
Fleishman-Hillard
44 -20-7395-7068
godselln@fleishmaneurope.