1. A virtual private telephone network for providing encrypted transport of a call across a public switched telephone network (PSTN) from a first enterprise location to a second enterprise location, said virtual private telephone network being located between one or more end-user stations at the first enterprise location and one or more end-user stations at the second enterprise location, said virtual private telephone network comprising: at least one rule associated with the first enterprise location; said at least one rule associated with the first enterprise location specifying at least one action associated with the first enterprise location to be performed based on at least one attribute of the incoming or outgoing call to/from the first enterprise location; at least one rule associated with the second enterprise location; said at least one rule associated with the second enterprise location specifying at least one action associated with the second enterprise location to be performed based on at least one attribute of the incoming or outgoing call to/from the second enterprise location; at least one first telephony appliance associated with the first enterprise location; said at least one first telephony appliance associated with the first enterprise location including means for determining said at least one attribute of the incoming or outgoing call to/from the first enterprise location; said at least one attribute being from a group including: the call direction, the call source number, the call destination number, the call type, said call type attribute being defined as one of voice, fax, or data transfer (modem), the call date, the call time, the call duration, the identifier for the extension or direct connect line carrying the call, the channel through which the call is processed, the start date of the call, the start time of the call, the end date of the call, and the end time of the call; said at least one first telephony appliance associated with the first enterprise location further including means for performing said at least one action associated with the first enterprise location specified in said at least one rule associated with the first enterprise location; said at least one action being from a group including: allowing the call, denying the call, conducting the call in encrypted mode, sending a tone, sending a message, logging the call, generating a report, and providing an alert; and at least one second telephony appliance associated with the second enterprise location; said at least one second telephony appliance associated with the second enterprise location including means for determining said at least one attribute of the incoming or outgoing call to/from the second enterprise location; said at least one attribute being from said group including: the call direction, the call source number, the call destination number, the call type, said call type attribute being defined as one of voice, fax, or data transfer (modem), the call date, the call time, the call duration, the identifier for the extension or direct connect line carrying the call, the channel through which the call is processed, the start date of the call, the start time of the call, the end date of the call, and the end time of the call; said at least one second telephony appliance associated with the second enterprise location further including means for performing said at least one action associated with the second enterprise location specified in said at least one rule associated with the second enterprise location; said at least one action being from said group including: allowing the call, denying the call, conducting the call in encrypted mode, sending a tone, sending a message, logging the call, generating a report, and providing an alert.