The term telephone extension is identified in base64 scheme by the sequence dGVsZXBob25lIGV4dGVuc2lvbg==, while the MD5 signature is equal to 1b17ff6ceb52b66f3b57f8864e6c1dbd. The ASCII encoding of telephone extension in hexadecimal notation is 74656c6570686f6e6520657874656e73696f6e.