00786nam a22002171 4500 1/19140 020516s2000 enk 1 eng d 1580531687 19704 DLC GR-PeUP 004.6'2 JO Johnston, Alan. SIP : understanding the session initiation protocol / Alan B. Johnston Boston : Artech House, 2001 xxi, 201 p. : ill. ; 24 cm. Artech House telecommunications library ; Includes bibliographical references and index Computer networks Protocols. Artech House telecommunications library. INST UNIPILB MAIN 20040709 004.6'2 JO 00139413 00139413 LOAN 0 1 /webopac/covers/01/19704_1580531687.jpg