SIP VoIP Tunnel

SessionFlow is a SIP RTP Tunnel solution for VoIP providers looking to help their end users avoid firewall and network blocking restrictions when making VoIP calls.

Pricing is $100 USD monthly and the feature is available on our Whitelabel product. Try it out with a 14 day free trial.


How it works.

SIP and RTP traffic is multiplexed over a single secure SSL connection by our softphone clients and sent to a detunnelizing server running in your network. The SIP and RTP traffic is then demultiplexed and sent to your softswitch. We provide the tunnel server as a linux container running on Docker. This means you can install it on the large number of platforms that Docker supports including Linux, Mac OS and Windows.

Rapid Setup

Tunnel server deployed as linux container running on Docker. Configuration is done via a simple web admin interface. Specify your softswitch IP and your ready to go.



  • Excellent Voice Quality
  • Rapid Deployment
  • Multiple Platform Support
  • Bypass NAT, Firewall, Packet Inspection
  • Reduce Bandwidth Consumption
  • IPV6 Support
  • Supports any Softswitch