Soapstone Networks Recognized by IEC as 2007 Infovision Award Finalist for Top Telecom Innovations

Avici Systems' (NASDAQ:AVCI), Soapstone Networks, today announced
that its Provider Network Controller (PNC) (TM) has been selected by
International Engineering Consortium (IEC) as a 2007 InfoVision award
finalist for top telecom innovations. IEC InfoVision Awards program
gives tribute to the technologies, applications, products, advances
and services judged as the most unique and beneficial to the
information and communications technology (ICT) industry. The
Soapstone PNC product was recognized in the New Product Concepts
Category.

The finalists were selected by a panel of judges chosen from the
Broadband World Forum Europe 2007 Technical Program Committee, which
consists of industry experts from vendor companies, service providers
and industry associations.

Entries were judged by a panel of industry experts according to
the following criteria:

-- Value of service or technology in solving recognized
technology problems, meeting network requirements, optimizing
service and performance, and/or enhancing customer service

-- Overall quality of innovation and contribution to technology
advancement

-- Originality and vision

-- Potential contribution towards positive industry growth and
service

-- Market success/acceptance (where applicable)

-- Contribution to end-user quality-of-experience and service
efficiency

"We are very pleased to be recognized this year by a panel of our
peers, service providers, and industry associations as having
contributed to the advancement of the information and communications
industry," said Larry Dennison, Founder and CTO, Soapstone Networks. "
We are very proud of the work we have done in bringing to market a new
product that can fundamentally change the way carriers deploy services
across their networks."

"The IEC's InfoVision Awards recognize top contributions in the
information and communications technologies (ICT) industry. We're
pleased to recognize Soapstone Networks as an InfoVision finalist for
its Provider Network Controller (PNC)," commented IEC President John
Janowiak.

InfoVision winners will be announced during an awards ceremony at
the Broadband World Forum Europe 2007 on Tuesday, October 9, 2007 at
11:30am at the World Forum.

The Soapstone Networks PNC mediates between multiple resource
requests from the OSS services/control layer via a standard SOA based
interface. The PNC dynamically models the available and occupied
capacity of the network, selecting the best path based on modeling
along with any other QoS based constraints. Services on the network
are dynamically migrated to allow the restoration of backup paths in
the event of a hard failure or to allow network equipment to be taken
on/off line. The PNC continuously monitors for SLA compliance as well
as network faults, allowing intelligent fault remediation as well as
fault reporting between network operation and provisioned services.

About Soapstone Networks

Soapstone Networks is at the forefront of an evolution to Carrier
Ethernet by delivering resource control systems that connect NGN
software-constructed services to the new Carrier Ethernet transport
network. Soapstone creates a common control framework that decouples
services from underlying network technologies. The Soapstone solution
dynamically provisions precise, SLA-quality services, continuously
optimizing utilization of network resources to bring orderly,
predictable business-driven behavior to service provider networks. The
future of Carrier Ethernet - www.soapstonenetworks.com.

This release may contain information about Soapstone Network's
future expectations, plans, and prospects that constitute
forward-looking statements for purposes of the safe harbor provisions
under the Private Securities Litigation Reform Act of 1995. Such
forward-looking statements are subject to risks and uncertainties,
which could cause actual results to differ materially from those
anticipated. When used in this press release, the words "will be" and
other similar expressions are intended to identify such forward
looking statements. Such risks and uncertainties include, but are not
limited to, Avici's ability to manage the transition of its core
router business, the early stage of Soapstone Networks, market
acceptance of Avici products, services and enhancements, customer
purchasing patterns and commitments, development of the market place,
reliance on technology and distribution partners, product development
and enhancement, intensity of competition of other vendors,
technological changes and other risks set forth in Avici's filings
with the Securities and Exchange Commission.