00558nam a22001577a 4500 0 0 0 0 RIU RIU 2012-07-31 Purchased: Pak Book Corporation 4084.00 0 621.382 VAl 4534 2021-06-09 00:00:00 1 2019-02-21 BK 0 0 0 0 RIU RIU 2012-07-31 Purchased: Pak Book Corporation 4915.69 1 621.382 VAL 5884 2019-04-26 00:00:00 2019-04-17 2 2019-02-21 BK 3207 3207 0863413625 (pbk) 9780863413629 621.382 VAL Valdar, Andy Understanding telecommunications networks London Institution of Engineering and Technology 2006 x, 336 p. : ill. ; 23 cm. Include index. Telecommunication systems Telephone network Mobile network TV network Network components Transmission systems Transmission networks FEAS BK