Polycom 4300T - Manual (Page 10)

User Guide V 2 IU 4300T Converged Network Appliance
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Call Quality Monitoring
Passive call quality monitoring for each SIP or MGCP voice call includes
statistics needed to enforce SLAs and resolve networking problems that
negatively affect call quality.
Future-proof Scalability
The 4300T is a powerful, flexible platform that can be deployed initially as a
low-cost WAN access router and then licensed through software for more
advanced VoIP features and increased call performance. It is the ideal
platform for service providers offering DIA, hosted VoIP and managed
security services or enterprises migrating to converged voice and data
networks.
Feature Summary
• VoIP
— SIP, MGCP(for voice) and H.323 (for video) application layer gateway
enables a single public IP address to be used for multiple VoIP
endpoints
— VoIP survivability provides local call switching to PSTN gateways
during WAN link failures (SIP only)
• QoS
— Class based queuing/prioritization
— Diffserv marking and policing
— Traffic shaping
— VoIP call admission control prevents oversubscription of priority
queue
• Security
— Stateful packet inspection firewall
— VoIP aware firewall dynamically provisions and closes UDP ports
used for VoIP calls
— IPSec: 3DES, SHA-1
— NAT/PAT server hides enterprise LAN topology
• Passive Call Quality Monitoring
— Per call statistics include mean opinion score (average and minimum),
jitter, latency, packet loss and much more
— Alarms for poor MOS scores