00358nam a2200157Ia 4500008004100000020001800041035001000059082002300069100002100092245002200113250000600135260003600141300000800177500000900185650000600194210723s9999||||xx |||||||||||||| ||und||  a9-814-12635-7  a39281  a621.385BDIG / BEL  aBellamy, John C. 0aDigital Telephony  a-  aNew YorkbJohn Wiley & Sons Inc  a643  a5427  a-