Bigelow, Stephen J. Understanding telephone electronics / Stephen J. Bigelow, Joseph J. Carr, Steve Winder - 4th ed. - Boston, Mass. : Newnes, c2001 - 402 p. : ill. (some col.) Includes index ISBN: 0750671750 Subjects--Topical Terms: TELEPHONE LC Class. No.: TK6162 / B533U 2001