Electronic cables for conveying analog and low speed digital signals

Encryptors and decryptors for use with analog and digital telephones; encryptors and decryptors for use with facsimile machines; encryptors and decryptors for use with analog and digital cellular telephones; encryptors and decryptors for use with personal computers; analog and digital telephones with built-in encryptors and decryptors; analog and digital cellular telephones with built-in encryptors and decryptors

electric apparatus and instruments for the coding of data, signalling apparatus and instruments, apparatus for recording, transmission or reproduction of sound or images; encryption devices; electronic devices and controllers to control and/or monitor the transmission or receipt of facsimiles or signals

electronics circuitry embedded on a pin electronics card which results in signal conditioning to block interfering signals in a computer driven test system for testing digital, analog and mixed-signal integrated circuits