Configuring the SBC 1000 for FXS Calling

This article describes the steps necessary for configuring the

SBC 1000 to route incoming PSTN calls to an FXS port. In the example below, ISDN/PSTN calls arriving with four digits are routed to an FXS port.

The process comprises four overall steps:

• Creating an FXS Signaling Profile
• Creating and configuring a CAS Signaling Group
• Adding and configuring a Transformation Table and Entry
• Adding a Call Routing Entry and resequencing it

Prerequisites

Software Version

Verify that your

SBC 1000 is loaded with the correct boot image version and that your SBC 1000 base software version is at least version 2.0.0, build 108.

System Licenses

The

SBC 1000 system must have the necessary licenses to make calls. In addition to CAS and DSP channels, and depending upon the types of calls, the Transcoding and SIP calls licenses may also be necessary. For details on Licenses, refer to Node-Locked Licensing

FXS Card State and Port Status

FXS Card State

• Check the state of the FXS card. Verify that the state for the Telco Module(s) indicated in the Cards/Modules Status pane is Activated.

Port Status

• Check the Port Status to verify that the FXS ports are functional. Verify that the Admin State and Service Status for each port indicates Up.

  
  

  If the FXS is not Activated and Up, check upgrade the boot image and 

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   SBC 1000 base software versions as outlined above.

Verify the FXS Port Connections

Verify that your FXS devices are connected to the ports you plan to configure.

Configuration

CAS Signaling Group and FXS Port configuration

1. Create an FXS Signaling Profile for CAS.

2. Create a CAS Signaling Group.

   Make sure to set the Channel Hunting to Own Number, otherwise the first free channel will answer every call (regardless of any other configuration settings).

3. Create an Assigned Channel and apply the desired phone number to the corresponding FXS port.

   You may add all of the port/number combinations for FXS in a single Signaling Group.

   Create Assigned Channel

    

4. Verify that the CAS Signaling group is configured as shown below.

   Verify Configuration of CAS Signaling Group

   
    

5. Verify that the FXS-attached phone(s) now have dial-tone.

Telephony Routing configuration

In order to route incoming ISDN calls with 4 digits to FXS ports, you must create a Transformation table whose entry prepends +1510574. The resulting called number, +1510574xxxx, then matches the Channel Phone Numbers configured in the previous section.

1. Create a Transformation Table for the FXS calls called PSTN to FXS:

2. Create a Transformation entry to that table called PSTN to FXS Transformation. Include the Input field as (.*) and the Output field as +1510574\1.

3. Add a call route table called From ISDN to SIP. Add a call route entry to that table which employs the transformation created in the previous step called PSTN to FXS.

4. Resequence the FXS call route to include PSTN to FXS.

Calls should now work from ISDN to FXS.

Call Debugging Trace

The

SBC 1000 logging trace produced was saved when making the FXS call.