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1. Login to the WebUI.
   
   
2. Click the Settings tab.
   
   
3. In the left navigation pane, go to Signaling Groups.
   
   

   1. Select the appropriate ISDN Signaling Group.

      Panel
      borderStyle none
      Caption 0 Figure 1 Select ISDN Signaling Group Image Modified

4. In the Port and Protocol panel:
   
   
   1. Select ATT 5ESS in the Switch Variant list box.
   2. Select Disabled in the Service Msg Capability list box.
      
      
5. Click Apply.