/mcpStep 8 Click Save. Assign Private Line Automatic Ringdown Dial Rule to SIP Phone You can configure Private Line Automatic Ringdown (PLAR) on SIP phones by assigning a PLAR-enabled SIP Dial Rule to the phone. Before you begin Create SIP Dial Rule for Private Line Automatic Ringdown, on page 580 Procedure Step 1 In Cisco Unified CM Administration, choose Device > Phone. Step 2 Click Find and select the phone on which you want to configure PLAR. Step 3 From the SIP Dial Rules drop-down list, choose the dial rule that you created for PLAR. Step 4 Click Save. Private Line Automatic Ringdown Troubleshooting Troubleshooting Private Line Automatic Ringdown on SCCP Phones Solution Symptom Make sure that the CSS that is assigned to the PLAR translation pattern contains the partition of the PLAR destination. The phone goes off hook and the user hears a fast busy (reorder) tone. Make sure that the CSS that is assigned to the phone contains the partition of the null PLAR translation pattern. The phone goes off hook and receives dial tone. Troubleshooting Private Line Automatic Ringdown on SIP Phones Solution Symptom Make sure that the CSS of the SIP phone can reach the PLAR destination. The phone goes off hook and the user hears fast busy (reorder) tone. Make sure that the SIP Dial Rule has been created and is assigned to the phone. The phone goes off hook and receives a dial tone. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 581 Presence and Privacy Features Assign Private Line Automatic Ringdown Dial Rule to SIP Phone