00289nam a2200109Ia 4500008004100000041001200041082001100053100002100064245008200085260000600167650000600173221030s9999    xx            000 0 und d  aEnglish  a105.23  aWhittam D. Reeve 0aSubscriber Loop Signaling & Transmission Handbook Analogcby Whittam D. Reeve  c0  aB