Figure 1: VoIP service provider supplying IP-PBX functions to business
The proliferation of VoIP technology has enabled a range of new services that were previously not cost-effective or even practical using the legacy Public Switched Telephone Network (PSTN). This use case describes a hosted PBX service, but could just as easily apply to other services such as hosted Interactive Voice Response (IVR) servers or hosted contact centers.
The VoIP service provider supplies SIP trunks and cost-effective virtual PBX services using a large, robust and redundant platform. The corporate client gets all the advantages of a PBX without the need to install, maintain or manage the PBX system.
A common way to supply these services is across the internet, which delivers a universal and inexpensive access method, although the medium itself is insecure. It is essential that this off-site service be delivered securely. Just as the firewall provides security to the data network, the SBC provides security to the VoIP network and individual VoIP calls. The SBC protects against toll fraud and other vulnerabilities which VoIP can introduce. The SBC in the VoIP service provider’s network and the eSBC in the corporation’s network provide needed security and privacy for the connection.
If privacy of the voice channel is important, encryption can be applied to voice traffic. Sangoma implements encryption using their transcoding engine.
Transcoding may be required if disparate equipment are unable to negotiate a common codec. Transcoding also allows for adjustments to the trade-off between bandwidth consumption and quality across the network.
Interoperability issues may appear between equipment used by the corporate customer and the VoIP service provider. The SBC on the service provider’s side corrects these compatibility issues by normalizing SIP messages.
VoIP routing issues can develop when Network Address Translation (NAT) is used by the corporate network. If the SIP messages use an IP address local to the corporate network, replies to the SIP message cannot be routed properly. This is corrected by the carrier SBC which changes the IP address of the SIP message to match the IP address of the packet in which it was delivered.
Sangoma has a wide range of SBCs to suit both the corporate network and the higher capacity VoIP service provider’s network. They are available as a hardware appliance or as software suitable for a purely virtual environment.
VoIP Protection at its Best Do you have a legacy phone system, such as a TDM PBX and are thinking about adding a Voice-over-IP connection to reduce telephony costs? Well if so, don’t make the most common mistake of using you’re the network’s firewall for voice security – You need a device calls a […]
Vega Enterprise SBC for the Small Business: Your Firewall for VoIP Networks Supports 5-60 simultaneous sessions/calls Migrate to SIP trunking or Hosted PBX securely Empower remote workers Interoperates with all major IP PBXs and UC systems, Including Asterisk®, BroadSoft®, Cisco®, Denwa®, Elastix®, FreePBX®, FreeSWITCH®, Gamma®, Lync®, Samsung®, 3CX® and more DoS/DDoS attack protection Network interconnect […]
NetBorder Carrier SBC: Carrier Grade Security and Interoperability 250 to 4,000 sessions, field upgradeable Allow any SIP CPE endpoint to safely connect with no interop concerns Connect VoIP islands together to create “all IP” infrastructure Mediate communications with other service providers Provides security for internal and external threats Dual redundant PSU available – DC and AC […]
Vega Enterprise SBC VM/Hybrid: The Flexibility, Redundancy and Durability of a VM-Ready Solution with the Scalability of a Hardware-Based Solution Supports 25-500 Simultaneous Sessions Field Upgradeable Browser-Based GUI for easier provisioning and management Security and QOS for Enterprise Networks DoS/DDoS Attack Protection Network Interconnect Point for SIP Trunking Topology Hiding for Fraud Protection UNIQUE HYBRID FEATURES […]
Virtual Machine VoIP Protection at its Best As the demand for virtualized infrastructures increases, the Sangoma Enterprise Virtual Machine (VM) SBC is the perfect solution for Enterprises and Carriers who need an SBC to secure their VoIP network and utilize existing hardware. The virtual Machine edition of our award-winning SBC offers the same rich […]
Vega Enterprise SBC: Security and Interoperability for the Enterprise Scalability from 25–250 sessions/calls (field upgradeable) All-in-one appliance for SIP and TDM connections Traffic visualization tools Cost-effective session-based licensing (no hidden fees) Enterprise inter-site networking and SIP trunking border control Local security management for SMBs and small enterprises Hardware-based transcoding Qualified for Microsoft® Lync® and Skype for Business® […]