TY  - BOOK
AU  - Sulkin,Allan
TI  - PBX systems for IP telephony
T2  - McGraw-Hill telecom professional
SN  - 0071375686
U1  - 621.387 22
PY  - 2002///
CY  - New York
PB  - McGraw-Hill
KW  - Internet telephony
KW  - BUEsh
KW  - Telephone
KW  - Private branch exchanges
KW  - GGEN
KW  - April2018
N1  - Index : p. 469-487
UR  - http://www.loc.gov/catdir/bios/mh041/2002512119.html
UR  - http://www.loc.gov/catdir/toc/mh031/2002512119.html
ER  -