Receive Inbound Calls through the Extended FXO Trunks

Once Cloud Voice is linked to a TA810 FXO gateway, the analog lines terminated on the gateway’s FXO ports act as extended trunks for your phone system. An FXO (Foreign Exchange Office) port is the analog interface that plugs into a phone line from the traditional phone network, the PSTN (Public Switched Telephone Network). To deliver a call that lands on one of those trunks to an extension, you set up routing in two places: a route on the gateway that forwards the call to Cloud Voice over SIP (Session Initiation Protocol, the signaling used for calls over an IP network), and an inbound route on Cloud Voice that sends the call to a destination.

Scenario

The diagram below traces how a call travels from the gateway’s FXO trunks into Cloud Voice.

Step 1. Create a Port-to-IP route on the gateway

On the TA810 gateway, add a Port->IP route so calls arriving on the FXO trunks are forwarded to Cloud Voice.

1. Sign in to the gateway’s web interface, go to Gateway > Route Settings > Port->IP/Port, and click Add Port->IP/Port Route.

2. Configure the route in the window that opens.

   

   • Simple Mode: Select Yes.
   • Route Name: Enter a name that is easy to recognize.
   • Call Source: Choose the FXO trunk or trunks to route from. This example uses all FXO trunks.
   • Call Destination: Choose the SIP trunk that connects to Cloud Voice. This example uses the trunk CloudVoice-Trunk.
   • Hotline: Enter a hotline number, such as 123456.

   Note

   The hotline number is passed to Cloud Voice as the DID (Direct Inward Dialing) number, the digits that tell the phone system which inbound route to use. Because a DID travels with the call, the call reaches the phone system (the PBX, or Private Branch Exchange) in a single stage and callers are never asked to dial a second time (no two-stage dialing).

3. Click Save, then Apply Changes.

Step 2. Create an inbound route on Cloud Voice

Add an inbound route so Cloud Voice accepts the calls arriving from the gateway and points them at a destination.

1. Sign in to the Cloud Voice management portal, go to Call Control > Inbound Route, and click Add.

2. Complete the fields below, leaving everything else at its default value.

   • Name: Enter a name that is easy to recognize.

   • DID Pattern: Define how the DID is matched.

     • DID Matching Mode: Select DID Pattern.
     • Pattern: Enter the hotline number you set on the gateway so it matches the incoming calls, 123456 in this example.

     Caution

     The Pattern here must match the Hotline number you entered on the gateway in Step 1 exactly. If the two values differ, no inbound route matches the call and it is rejected.

     

   • Trunk: Select the SIP account trunk that connects to the gateway (the Cloud Voice side of the same link the gateway route points at). This example uses the trunk Connect-to-TA810-Gateway.

     

   • Default Destination: Choose where matched calls should land. This example points to extension 2000, so any call coming in from the gateway rings that extension.

     

3. Click Save, then Apply.

Step 3. Test the FXO trunk

Place a call to the number of an extended FXO trunk to confirm the routing works end to end. For example, if the trunk’s number is 505523301, dialing 505523301 rings extension 2000 on Cloud Voice.