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This article describes the steps necessary to configure the Sonus SBC 1000/2000 so that a call may be placed from a SIP phone through the Sonus SBC 1000/2000 to an ISDN endpoint as depicted by the following call flow:

Topology

On this page:

Sonus SBC 1000/2000 Configuration

SIP Local Registrar Table Configuration

  1. In the WebUI, click the Settings tab.
  2. In the left navigation pane, go to SIP > Local Registrars
  3. Add a new SIP Local Registrar.

Transformation Table Configuration

  1. In the WebUI, click the Settings tab.
  2. In the left navigation pane, go to Transformation
  3. Add a new Transformation Table.
  4. Add two entriesto the new Transformation Table as show below.

Call Routing Table Configuration

  1. In the WebUI, click the Settings tab.
  2. In the left navigation pane, go to Call Routing Table
  3. Add a new Call Routing Table.
  4. Add an entryto the new Call Routing Table and configure it as shown below.

SIP Signaling Group Configuration

  1. In the WebUI, click the Settings tab.
  2. In the left navigation pane, go to Signaling Groups.
  3. Add a new SIP Signaling Groupand configure it as shown below.

ISDN Port Configuration

  1. In the WebUI, click the Settings tab.
  2. In the left navigation pane, go to Node Interfaces > Ports.
  3. Click the port you wish to configure.
  4. Configure the portas shown below.

ISDN Signaling Group Configuration

  1. In the WebUI, click the Settings tab.
  2. In the left navigation pane, go to Signaling Groups.
  3. Add a new ISDN Signaling Group.
  4. Configure the new ISDN Signaling Group as shown below.

Verification

Endpoint Registration:

When the endpoint registers, the registration request arrives to the Sonus SBC 1000/2000 through the SIP signaling group, the Sonus SBC 1000/2000 responds to the REGISTRATION request with a 200 OK – a successful SIP endpoint registration occurs.

Using the Log Exchange utility, you can quickly verify the relevant SIP messaging: