TY  - BOOK
AU  - Sulkin,Allan
TI  - PBX systems for IP telephony 
SN  - 0071375686
U1  - 621.385 SUL 
PY  - 2002///
CY  - New York
PB  - McGraw-Hill
KW  - Internet telephony
KW  - EL
KW  - Telephone
KW  - Private branch exchanges
N1  - Includes index
UR  - http://www.loc.gov/catdir/bios/mh041/2002512119.html
UR  - http://www.loc.gov/catdir/toc/mh031/2002512119.html
ER  -