| During Phase One, municipalities will
still use their analog and digital phones. Phase Two introduces
the use of voice-enabled IP endpoints such as IP phones, softphones,
wireless phones, personal digital assistants (PDAs), and other
IP appliances. The use of IP phones will improve the efficiency
and reduce the cost of voice communications transported within
the municipality's premises and to remote workers. However,
the ICP should not dictate to the enterprise what phones it
should use; instead, it must be able to support all types
of phones-analog, digital, and IP.
IP phones will enable self-service moves, adds, and changes;
more flexible deployments; and ultimately, new features
and capabilities. For on-premise calls, IP transports voice
traffic over the LAN as IP data packets. For off-premises
calls, IP enables voice to be carried over the data network
( internet and private network) end-to-end, regardless of
location.
Several factors had been preventing the full-scale deployment
of IP phones, the most important of which were the lack
of standards, QoS, functionality, and reliability. These
have been largely solved. As municipalities evolve IP phones
will become the preferred end-point for all calls, regardless
of origination or destination. This transition will take
place over several years and during that time IP phones
will coexist with traditional digital and analog phones.
The type of phone deployed will depend on the application
and the return on investment.
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IP
Trunking
Phase
2 -
Characteristics
