PBX Systems for IP Telephony

Calling all--
* telecom managers
* datacom managers with voice responsibilities
* Call Center managers
* VoIP implementers
* network integrators
* product and service developers
* industry analysts

"Clear and precise analysis and discussion of PBX system design and capabilities. Allan Sulkin has a unique ability to explain complex systems in easily understandable terms." -- Joe Licata, President, Siemens ...