TY  - BOOK
AU  - Sulkin, Allan
TI  - PBX systems for IP telephony  
SN  - 9780071375689
U1  - 621.387 SUL 
PY  - 2002///
CY  - New York 
PB  - : McGraw-Hill
KW  - PBX systems for IP telephony
KW  - Allan Sulkin
KW  - Internet telephony
KW  - Enterprise Communications Systems
KW  - Legacy PBX Call Processing Design
KW  - PBX systems
ER  -