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This article describes the steps necessary for configuring the Sonus 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.

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The FXS card does not function with older versions of the Sonus SBC 1000 firmware/software. Should you need to upgrade your Sonus SBC 1000 unit, you must follow the Sonus SBC 1000/2000 Upgrade Guide.

System Licenses

The Sonus 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 as shown below:

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1. Create an FXS Signaling Profile for CAS.

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   Caption 0 Figure 1 Create FXS Signaling Profile Image Modified

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).

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   Caption 0 Figure 1 Create CAS Signaling Group

    

    

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.

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   Caption 0 Figure 1 Create Assigned Channel

    

    

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

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   Caption 0 Figure 1 Verify Configuration Of of CAS Signaling Group

    

    

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

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