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SBC stands for Session Border Controller
- Simplified Explanation
- SIP Firewall
- SIP Security Device
Session
- Real time interactive communications
- Voice, Video, multimedia
- SIP or H323 Signaling
Border
- IP to IP network border
- SIP trunks to service providers
- Remote worker access
- Internal Enterprise / External Enteprise
Control
- Security & SLA assurance
- Revenue & cost optimization
- Compliance
Why use an SBC
SBC are installed at the edge of VoIP Networks to facilitate end to end VoIP transmission without compromising network security
Essential for Several reasons:
- New security issues introduced with SIP protocol
- Fix Interoperability issues
- Implementation of UC/Collaboration features
SBC are typically implemented as Back to Back User Agents (B2BUA)
- All SIP and Media (voice) traffic transit through SBCs
B2BUA Explained
- A back to back user agent (B2BUA) is a logical network element in the Session Initiation Protocol (SIP) applications
- It operates between two endpoints in a communication session and divides the communication channel into two different call legs
- It mediates SIP signalling between both ends of the call
- B2BUAs are often implemented within media gateways
