The EdgeMarc 4550 Series are flexible application ready enterprise session border controllers that can be deployed nitially as a low-cost WAN access router and expanded to other application such as hosted VoIP SIP trunking and enterprise video over IP 4 T1 ports enabled and up to 50 concurrent WAN calls enabled Enterprise-class session border controller optimized for medium to large offices Connect to SIP Trunking and hosted IP telephony services Protects voice devices by providing voice-aware security services Optimizes voice quality using traffic management and prioritization Manages the quality of real time communications to simplify troubleshooting