Session |
Border |
Controller |
| A communication between two parties. This would be a call’s signaling message, audio, video, or other data along with information of call statistics and quality. | A point of demarcation between one part of a network and another. |
The influence that session border controllers have on the data streams that comprise sessions like security, measurement, access control, routing, strategy, signaling, media, QoS and data conversion facilities for the calls they control. |
| Application | Topology | Function |
Connectivity Issues |
Compatibility Issues |
Security Issues |
| No voice / one-way voice caused by NAT between different sub-networks. | Interoperability between SIP products of different vendors is unfortunately not always guaranteed. | Intrusion of services, eavesdropping, denial of service attacks, data interceptions, toll frauds, SIP malformed packets would cause big losses on you. |
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| NAT modify private IP to external IP but can’t modify application layer IP. | Destination IP address is wrong,therefore can’t communicate with endpoints. |
| NAT modify private IP to external IP but can’t modify application layer IP. | SBC can identify NAT, modify IP address of SDP. Therefore obtain correct IP address and RTP can reach endpoints. |
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Q: What causes traffic overload? A: Hot events are the most common trigger sources, such as double 11 shopping in China (like Black Friday in USA), mass events, or attacks caused by negative news. A sudden surge of registration caused by data center power failure, network failure is also a common trigger source. |
Q: how does SBC prevent traffic overload? A: SBC can sort traffics intelligently according to user level and business priority, with high overload resistance: 3 times overload, business won’t be interrupted. Functions like traffic limitation/control, dynamic blacklist, registration/call rate limiting etc. are available. |
| Interoperability between SIP products is not always guaranteed. | SBCs make the interconnection seamless. |
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Q: Why do interoperability issues occur when all devices support SIP? |
Q: How does SBC solve this problem? |
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| Differences between Firewall and SBC | Do you still need an SBC in additional of VPN |
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| Firewall and SBC are complementary, SBC is an essential network element of IP Telephony System. | Yes, an extra SBC is still needed for Attack Protection, traffic control and SIP user access. |
| SMB SBC | Enterprise SBC | Carrier grade SBC |
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| SBC300 | SBC1000 | SBC3000 |
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| SIP Trunking for SMEs Access to ITSP / Carrier | SIP Trunking for Enterprise Access to Multiple Carriers |
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| Secure Communication of Remote Offices | ITSP Access to Carriers |
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| Hosted /Cloud IPPBX / Call Center | Carrier Interconnect |
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| Small Investment | Reliable Design | Full Protection |
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| Fast Support | Simple License | Flexible Scalability |
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