TY - BOOK AU - BATES R. AND GREGORY D. TI - VOICE and DATA COMMUNICATIONS HANDBOOK 5TH ED SN - 13-978-0-07-064766-4 U1 - 005.71 PB - TATA MC GRAW HILL PUB.CO.LTD., NEW DELHI KW - VOICE NETWORK (B.E.) N1 - 13932 ER -