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