PBX systems for IP telephony
Sulkin, Allan
PBX systems for IP telephony / Allan Sulkin - New York : McGraw-Hill 2002 - viii, 487 p. : ill. ; 24 cm.
9780071375689
HCL
PBX systems for IP telephony
Allan Sulkin
Internet telephony
Enterprise Communications Systems
Legacy PBX Call Processing Design
PBX systems
621.387 SUL
PBX systems for IP telephony / Allan Sulkin - New York : McGraw-Hill 2002 - viii, 487 p. : ill. ; 24 cm.
9780071375689
HCL
PBX systems for IP telephony
Allan Sulkin
Internet telephony
Enterprise Communications Systems
Legacy PBX Call Processing Design
PBX systems
621.387 SUL