Riverstone Networks Network Device SSG - Manual (Page 10)

Global Title Translation
Intelligent networks and wireless switching
systems often do not perform Global Title
Translation (GTT) efficiently. When services such
as enhanced 800/900, virtual private networks
and HLRs are triggered, the switches suspend
call processing and launch a query into the
network toward the adjacent STP. The message
contains address information that determines
the GTT to be performed. When services are
distributed across multiple service control points
or HLRs, GTT provides efficient routing and
redundancy. Keeping the GTT information in
a central pair of STPs supports efficient and
flexible operation of the network. The Alcatel
5070 SSG ANSI provides the powerful, real-time
processing necessary to meet these GTT
requirements.
Gateway Screening
The Alcatel 5070 SSG ANSI acts as a gateway
for messages transferred between networks.
Increasing competition and globalization
of the telecommunications market prompted
requirements for monitoring, measuring and
controlling access between SS7 networks.
Consequently, the Alcatel 5070 SSG ANSI Gateway
Screening feature has become increasingly
important to ensure network security.
The Gateway Screening feature allows for
message traffic based on commercial agreements.
This feature provides operators with the ability
to protect against unauthorized traffic between
networks, to protect against malicious and
unauthorized access to the network, and to
collect measurements on traffic screening
results. The Alcatel 5070 SSG ANSI provides the
ability to screen messages as they are received.
Gateway Screening prevents unauthorized
access to databases and prevents use of unleased
facilities and services. In the screening process,
the MTP and SCCP parts of the message are
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