3CX SBC DUO
3CX includes the 3CX Session Border Controller (SBC) which allows easier bridging of remote 3CX instances and connection of remote extensions. The 3CX SBC combines all SIP (signaling) and RTP (media) VoIP Packets from one location and delivers them to and from another location (typically the PBX Server) using a custom TCP protocol.
This simple concept allows 3CX to overcome firewall or telecom provider issues. The 3CX SBC can be used for the following reasons:
- Resolve issues of NAT Traversal at both the remote and the PBX location.
- Simplified Firewall configuration at both the remote and the PBX location.
- Overcome difficulties with ISPs that block VoIP Traffic based on port numbers.
- Allows VoIP-over-WiFi in some restricted locations, such as Hotel rooms.
- “Fixes” Firewalls that cannot handle VoIP traffic correctly or which are very problematic to configure correctly, such as Microsoft ISA Server
How it Works
The image above demonstrates how the 3CX SBC works. In this example, 3CX Phone System is on IP Address 10.0.0.181, and listens on TCP port 5090 (by default) for incoming Tunnel traffic. We must set up a single Port Forwarding rule on the NAT/Firewall Device, telling it that all incoming TCP and UDP traffic received on port 5090 should be delivered to LAN IP Address 10.0.0.181.
The remote setup is shown on the left hand side of the cloud. In this example, the machine with IP address of 192.168.0.2 has the 3CX app installed. We will need to tell the VoIP Phone the public IP address of the PBX Server (which in this case is 213.165.190.51), and also the private IP address of the PBX Server (which in this case is 10.0.0.181). Since the 3CX app will by default use the standard port numbers used by 3CX, typically no further configuration is necessary.
The 3CX SBC can be used in the following scenarios:
- Connect Remote Sites using the SBC – For remote sites with a number of remote phones, you can deploy the 3CX SBC to the site so that all phones will communicate with the 3CX PBX over a single port. This is also the preferred option in case 3CX is running in the cloud.
- Connect Remote 3CX app Users – The 3CX apps for Windows, Mac, iOS and Android have a built in tunnel that will be used automatically when the 3CX app detects it is not on the LAN.
- Connect 3CX instances via a Bridge – When creating a Bridge to another 3CX Phone System, you can choose to use the 3CX SBC rather than a direct connection.
Session Border Controller Features
- 3CX SBC Pre installed
- Advanced security protection
- Hybrid SBC and gateway platforms
- VoIP Protection
- Extensive SIP interoperability
- Deployment Flexibility and Simplicity
- Remote Connectivity
- Scalable range of devices
Specifications
CPU
Intel Atom
RAM
4GB DDR3
Storage Capacity
32GB EMMC
USB
2* USB 2.0 for external storage or disaster recovery system
Ethernet ports
2 (100Mbps speed)
HDMI port
1
Form Factor
165*165*40mm
Color
Black
Warranty
1 year
Software
3CX SBC Pre installed
Certification
Download Manual
