4
October 2002 - This call marks an important milestone in new
network architecture combining circuit-switched GSM and 3G
core networks and a major step toward cost-efficient All-IP.
Nokia
and Vodafone Omnitel have carried out the world's first
VoIP call completed in a 3GPP release 4 compliant network
that transports circuit-switched voice and data calls through
an IP backbone. The call was performed using the commercial
Nokia MSC Server and Nokia Media Gateway products in laboratories
in Helsinki during a two-day visit by a technical management
delegation from Vodafone Omnitel to study the Nokia MSC
Server implementation.
The
Nokia MSC Server will enable more effective mobile switching
and traffic transmission in mobile networks to serve more
efficiently the needs of increasing traffic. It is a key
element in the new core-network architecture that flexibly
combines GSM and WCDMA networks -- a crucial step in the
development of All-IP networks. It is estimated to reduce
the operational and capital expenditures of an operator
by an order of 30 % compared to existing switching and transmission
solutions.
The
unmatched benefit of the new core architecture is the separation
of the control and routing functions into separate network
elements. The MSC Server, which is sometime referred to
as a mobile network "soft switch", performs the call-control
and signaling function (called the "control plane"). MSC
Server architecture implements new packet-switching and
VoIP technology for mobile switching and transmission, and
is based on the 3GPP release 4 standards. The routing function
(called the "user plane") is handled by a separate network
element, the Multimedia Gateway. This separation makes the
Nokia solution extremely flexible and scalable.
SOURCE
Nokia Press Release Back
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