The term telephone circuit is identified in base64 scheme by the sequence dGVsZXBob25lIGNpcmN1aXQ=, while the MD5 signature is equal to 545f8bd21a43af91e2b87f3f6f09b3cf. The ASCII encoding of telephone circuit in hexadecimal notation is 74656c6570686f6e652063697263756974.