الفرق بين السنترال التقليدي وسنترال بروتوكول الإنترنت






Packet Switching IP-PBX Traditional Circuit Switching PBX  
Fully distributed Centralized Architecture
River topology; IP extensions can be deployed at any node over TCP/IP networks Star topology; each desk requires a wiring from the cabinet Wiring
Scalable capacity, depend on bandwidth and processor capability Capacity is limited by the hardware framework Capacity
Scalability can be done by using the same architecture Complexity of system scalability depends on system size Scalability
Voice and data are converged in one network Voice and data require two separate networks Networks Convergence
Internet ready Connect to Internet via VoIP gateway Internet Connectivity
Simplified MACs; move, add, and change extensions can be as easy as plug-and-play Move, add, change extensions require physical connection adjustments MACs
All add-on voice & call processing features implemented by software Traditional voice & call processing features Extended Application
Software-based applications; easy to be implemented Applications require designated interfaces and equipment Voice
applications
Support server level redundancy N/A. Another complete PBX system can be configured as a backup system Server
redundancy
Provide GUI or even web-based interface configuration Configuration is done via phone set with command codes in common System configurations
Remote workers and office are linked altogether by VPN/WAN Do not support remote extensions Off-  premises  extensions
Systems are connected by cost efficient Internet resources Cross-system linkage requires dedicated ISDN Multi-location
PCs and phones are already integrated in one voice/data network Complex integration between PCs and telephones CTI integration
Low to medium, independent of capacity Low to high, positively correlated with functionality and capacity

Average Cost Per Seat