| 摘要 |
A virtual private branch exchange (VPBX) has an internet-connected server with at least one digital processor coupled to a data repository, and software executing on the one or more processors from a non-transitory medium. The VPBX maintains configuration data for individual legacy PBX systems, including telephony services enabled by the software to be provided to each legacy PBX system, receives packet-data protocol telephone calls uniquely digitally associated with the individual legacy systems, forwards those calls via a gateway to PSTN destinations, or via the Internet to IP destinations, and provides additional telephony services associated at the VPBX with each legacy system.
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