Centrex or PBX the impact of IP Abrahams, John R. creator Lollo, Mauro. text mau Boston Artech House c2003 2003 monographic eng
print
xvi, 161 p. : ill. ; 24 cm. John R. Abrahams, Mauro Lollo. Includes index. Internet telephony Centrex telephone service TK5105.8865 A27 2003 621.385 ABC Artech House telecommunications library 158053497X (alk. paper) 2002044068 BD-DhUL 021230 20150114174302.0 13043405