How can we promise to deliver voip service to any place on earth inclusing countries where all voip protocols are blocked on ISP level? The answer is VPN.

Let us first review some typical business cases and its problems.

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On the diagram above the following situation is displayed:

  • You have a termination gateway and want to sell your route to wholesale customers.
  • You connect your gateway to local ISP, get public IP address and give it to your customer.
  • Your customer tries to send a call to your IP address but fails because your ISP is blocking voip traffic.

The same situation with retail pc2phone business. You cannot send voip calls from your retail customers to a-z providers for termination.

The solution

The solution is to setup a VPN tunnel between the access server located in public internet without any blocks (UK TeleHouse, for example) and VoIP gateway. Here we have 2 choices:

  • Many VoIP gateway support VPN on-the-board. In this case we bring up a tunnel directly between a gateway and our hosted switch platform.
/files/images/voip_vpn.png
  • Not all VoIP gateways support VPN protocols so in this case an intermediate router is put as VPN client.
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There is no special requirements for VPN client PC. It can be old 350 Mhz box with 64 RAM installed even without HDD drive (booting from CD or Flash).

For more information please refer to the documentation or contact us.