Unformatted text preview: he merger
of packet switching technology with SS7 intelligence. As a result of the
phenomenal growth of data traffic, technological and cost-performance
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The International Engineering Consortium 4/14 improvements in packet and cell switching have far outstripped any gains in TDM
technology. For example, using the latest advances in silicon-based switching, an
ATM–based tandem switch can be built for a small fraction of the cost per port of
a traditional TDM–based switch. Moreover, an up-to-date cell switch consumes
less power and occupies far less space than a TDM switch.
As competitive carriers try to minimize start-up costs, a small footprint for
equipment is essential. The cost of co-location space can be as high as $250,000
annually; if forced to use a traditional, extremely large circuit switch, a
competitive carrier would have very high co-location fees in addition to the
enormous capital outlay for the switch. Furthermore, because space in central
office (CO) environments is becoming increasingly more difficult to obtain,
equipment that has a small footprint yet that can scale to support large numbers
of subscribers is quite important.
Convergence switching solutions should include full-featured SS7 support and
standard telephony interfaces and fully interoperate with the existing PSTN
infrastructure to support all of the voice features to which users are accustomed.
Solutions that are based on ATM can deliver toll-quality voice with constant bit
rate (CBR), while distributed SS7 processing ensures that signaling scales as
rapidly and economically as port count.
A convergence switch that has an architecture with distributed signaling supports
the consolidation of SS7 links from multiple convergence switches and therefore
offers efficient and centralized operations and billing management. This, along
with the use of ATM virtual circuits (rather than TDMs’ physical circuit
provisioning), greatly improves service operation, management, and
In summary, a converged switching architecture removes the remaining barriers
to the cost-effective convergence of voice and data by delivering the following:
• telephony-grade reliability • toll-quality voice • full SS7 signaling integration • extreme scalability of both port count and SS7 signaling power • an open architecture for rapid, simplified service deployment A converged architecture can leverage existing invest...
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- Spring '09
- Telephone exchange, Asynchronous Transfer Mode, Signaling System 7, International Engineering Consortium, Web ProForum Tutorials