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Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
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Douglas G. Smith•Richard G. Mo•Ismail I. Sola•Narayan P. Menon
The field of the present invention relates to a method and system for providing communication services.
Opuswave Networks, Inc.
English (United States)
This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately
2% of the total text.
OF THE INVENTION
TION SYSTEM WITH WIRELESS TRUNK
OF THE INVENTION
of the Invention
field of the present invention relates to a method and system for
providing communication services .
telephone switching systems such as private branch exchanges (PBXs) and
type systems have for many years been available to business offices and
other establishments as an alternative
or adjunct to public telephone service. A PBX or key system allows users connected to the system to
place intra-system telephone calls without accessing the public telephone service. Such a system can provide significant
economic benefits, particularly if
intra-system telephone traffic is heavy.
other hand, when callers using a PBX or key system need to place a call to
a party not connected to the system,
such outside calls must typically be routed through the PBX or key system controller over landlines
to the public telephone company. To
accommodate such dual functionality (i.e. , intra-system call support
and outside call support),
special-purpose telephones have been developed for connection to a PBX
or key system to allow manual routing
of telephone calls. For example, deskset telephones can be provided with buttons corresponding to different
telephone lines. By depressing the appropriate
button, the user selects between certain designated lines for calls
within the system, or different
designated lines for calls over the public telephone network.
other PBX and key systems call routing over the selected lines may be
automatic. For example, the user may
select an intra-system call or a call over the public telephone network according to the first digit dialed,
and the PBX or key system then analyzes the first digit and routes the call to the proper destination using the
PBX and key systems are useful for providing economical coverage within a private local telephone system, for long
distance the PBX users or key system users may still be required to rely on a local exchange carrier (LEC) whose
landlines are connected to the PBX. The
local exchange carrier then routes the call to along distance carrier. Because
the user must pay both the local
exchange carrier and long distance carrier for each long distance telephone call, long distance telephone
service can be quite costly, particularly if the volume of long distance calls is large.
high costs for long distance service, another potential disadvantage of
existing PBX or key telephone systems
is that deployment can be difficult or expensive in remote areas. For example, if long distance service
or other public network services are required,
deployment of a PBX or key system is generally limited to where landlines have
been laid, so that the PBX or key
system can have a connection to a local exchange carrier which connects to the long distance provider. If
no landlines are p...