TY  - BOOK
AU  - Abrahams, John R.
AU  - Lollo, Mauro jt.au.
TI  - Centrex or PBX: the impact of IP
SN  - 158053497X
U1  - 621.385 
PY  - 2003///
CY  - Boston
PB  - Artech House
KW  - Contrex telephone service
KW  - Telephone-Private brance exchanges
KW  - Internet telephony
ER  -