Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Reexamination Certificate
2005-04-12
2005-04-12
Hong, Harry S. (Department: 2642)
Telephonic communications
Plural exchange network or interconnection
With interexchange network routing
C370S356000, C370S401000, C370S410000, C370S466000, C370S467000, C379S230000, C379S231000, C379S234000, C379S900000, C379S901000
Reexamination Certificate
active
06879680
ABSTRACT:
A virtual private network includes an internet protocol (IP) network and a public switched telephone network (PSTN). An enterprise gateway is operably connected to the IP network. The enterprise gateway is operably connected to a switch of the PSTN through a direct access line (DAL). The set-up signaling for virtual private network calls and the calls themselves are transported across the internet protocol network and the public switched telephone network through the direct access line.
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Cannon Matthew J.
Donovan Steven R.
Hong Harry S.
MC, Inc.
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