Vanguard Networks Introduces Session Initiation Protocol (SIP)

MANSFIELD, Massachusetts, August 30 /PRNewswire/ --

- VOIP Subscribers Can Lower Costs Using Vanguard Routers and Add SIP
Phones

Vanguard Networks announces new SIP (session initiation protocol) gateway
to allow customers to reap the benefits of IP Telephony. With the addition of
SIP functionality Vanguard customers who subscribe to VOIP services from an
IP telephony service provider will now be able to save on monthly charges,
while keeping high quality and reliability. Customers can continue to use
existing phones connected to a Vanguard Gateway router to keep initial
expenses low, and also add SIP phones to lower administrative costs.

Vanguard Networks provides voice over IP with SIP, QoS, Security &
Routing in a single platform to:

-- Allow Internet Telephone Service Providers (ITSP) to offer single edge
       device
    -- Provide analog/digital phone to SIP gateway capabilities
    -- Provide (FXO) PSTN back up to ITSP service
    -- Support SIP IP-Phones
    -- Route IP and non IP data



Vanguard Networks routers support both SIP and analog phones, and
corporate PBX and key systems, supporting a full mix of data and telephony
services as networks evolve.

With this announcement, Vanguard Networks routers now act as a Media
Gateway and a Signaling Gateway between Voice over Frame Relay service and
VOIP service. This powerful feature enhances the abilities of Voice over
Frame Relay customers to migrate to VOIP on their own timeline. Mixed
networks of Voice over Frame Relay sites and Voice over IP sites can easily
interoperate.

Download our product introductory kit at
http://www.vanguardnetworks.com/products/solutions/ip_telephony/

SIP Gateway functionality is available on all Vanguard Network routers
equipped with voice option cards, running Applications Ware release 7.0 or
higher with Advanced Voice Applications Ware software license.

Download our Software Release Information 7.0 at
http://www.vanguardnetworks.com/products/applications_ware_software/

About Vanguard Networks

Headquartered in Mansfield, Mass., Vanguard Networks offers a portfolio
of advanced multi-service protocol gateway solutions, IP routing products and
system support maintenance services for use in enterprise and government
networks. Vanguard Networks portfolio of multi-service access gateways and IP
routers feature leading edge support for telephony over data networks,
delivering integrated telephony gateway function supporting analog/digital
phones and PBX' s and leading edge voice packetization compliant with G.729,
G.723, G.711 and supporting H.323 and SIP signaling.

Press Contact:
    Urs Bachmann
    +1-508-261-4124
    ursbachmann@vanguardnetworks.com
    http://www.vanguardnetworks.com

    Web site: http://www.vanguardnetworks.com
              http://www.vanguardnetworks.com/products/solutions/ip_telephony
          http://www.vanguardnetworks.com/products/applications_ware_software