7 ½ X 10 7/16 in Preface; LAN software; Networking; Operating systems; Bluetooth and wire less LANs; Fault-finding on RS-232 systems; Optical fibre technology and the IEEE interface standard; Multiplexing (TDM and FDM); Data compressi on; Digital line systems; On-line services; Digital radio systems; Gloss ary of data communications terms; Index. nd the standards that govern these technologies. The new edition has bee n fully updated to include new material on USB, Firewire, IP version 6, ISDN, ADSL / HDSL, PC video standards and video on demand. The section o n LANs has been rewritten with new sections on Cisco, connecting LANs to WANs, and wireless LAN technologies including Bluetooth. There is also a greatly increased emphasis on security, access and administration issu es.