Abstract: A system and method for transparently transmitting aural signals across a wide area network (WAN). The system of present invention is connected to one or more of a private branch exchange, a key telephone system, a telephone, a facsimile machine, and a modem, for example. In the case of voice transmission, a user places a telephone call using the same procedure that is used when placing a telephone call over a conventional public switched network. The aural signals are translated into a format that is compatible with the local area network (LAN) and the translated signals are transmitted to a router or a switch that connects the LAN to the WAN. The data is transmitted across the WAN to a router or switch coupled to a second LAN. The data is then sent to a destination central site unit or PC which translates the signal into a format that is compatible with the telephone system connected thereto.

Abstract: A system and method for transmitting aural signals across a wide area network (WAN) from a local phone coupled to a computer, e.g., a PC-phone, to a remote phone coupled to a KTS, PBX, or PSTN, for example. This capability is provided by the gateway unit of the present invention. The system of the present invention is quickly installed in a server or a personal computer coupled to a local area network. The system is connected to one or more of a PSTN, a private branch exchange, a key telephone system, a telephone, a facsimile machine, and a modem. In the case of voice transmission, a gateway unit translates received telephony signal into a format that is compatible with the telephone system or equipment connected thereto. The present invention can provide a voice quality that approaches, equals, or exceeds the voice quality of conventional telephone switched networks.

Abstract: A traffic analyzer (16) for a local area network (10) having multiple stations (14) that exchange message packets (24) receives selected ones of the message packets (24). The analyzer (16) stores a message packet table (TABLE(0)-TABLE(6)) and generates a table pointer (P) as a function of both the source address (S) and the destination address (D) of each received packet (24). A record (S,D,N) of each received packet (24) is stored in the table entry (TABLE(P)) associated with the table pointer value (P) for the respective received packet (24), where N is equal to the number of received packets having the source address S and the destination address D.

Abstract: A local area network timing analyzer responds to a signal on a local area network to generate a carrier detect signal which is indicative of the presence or absence of signaling activity on the local area network. The carrier detect signal alternates between two logic states indicative of packets and gaps between packets. The timing analyzer stores an array of timing entries, and individual ones of these timing entries are indicative of the time duration of individual gaps and packets. These timing entries are sorted and otherwise used to display timing information for the local area network.