Patent ID: 9160753
Filing Date: 2015-10-13
Classification: H04L

Abstract:
1. A communication system comprising: a first codec coupled to a first terminal through a first packet network and operable to decapsulate an analog voice signal from a first packet stream received from the first terminal, wherein the first packet stream comprises, within the same packet stream, digitized information representing both an analog voice signal portion and a non-voice signal portion, the analog voice signal portion comprising an analog voice signal and the non-voice signal portion comprising a data signal, the data signal comprising non-voice data and including no analog voice signals, and wherein the first codec is configured to transmit only the analog voice signal portion of the first packet stream to an analog voice line and is configured to prevent the data signal from being transmitted to the analog voice line; a second codec coupled to a second terminal through a second packet network, the second packet network being separate from the first packet network, wherein the second codec is operably coupled to the first codec through the analog voice line and one or more signaling lines, wherein the first packet network and the second packet network are configured in a multi-level security (MLS) architecture, the first packet network having a security level that is different than the security level of the second packet network, wherein the second codec is operable to encapsulate the received analog voice signal in a second packet stream and transmit the second packet stream to the second terminal; and wherein the analog voice line is operably coupled to the first and second codecs and the first and second packet networks and wherein the analog voice line is constructed and arranged to carry only the analog voice signal and not the data signal, whereby the analog voice line is operable to convey only the analog voice signal portion of the first packet stream from the first codec to the second codec while restricting communication of the data signal in the non-voice signal portion of the first packet stream from being transmitted using the analog voice line, wherein the analog voice line blocks communication of the non-voice data signal of the first packet stream to the second packet network, and blocks communication of the second packet stream with the first packet network, to ensure that the data signal from the first terminal is not transmitted to the second terminal; and wherein the one or more signaling lines are operable to convey control signals associated with the analog voice signal, the signaling lines being decoupled from at least one of the first packet network and the second packet network.