@book{ Solr-483596, title = {Subscriber loop signaling and transmission handbook digital / Whitham D. Reeve.}, series = {Telecommunications handbook series.}, author = {Reeve, Whitham D.}, address = {Piscataway, NJ : New York}, publisher = {IEEE Press ; Institute of Electrical and Electronics Engineers}, year = {1995}, pages = {654}, note = {"Reviewed and endorsed by the IEEE Communications Society."}, url = {http://ieeexplore.ieee.org/xpl/bkabstractplus.jsp?bkn=5264445} }