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2. Save the configuration. On the VoIP trunk page, click on the edit icon for the newly created
trunk to edit this SIP peer trunk.
3. Under Basic Settings, configure the following options for the SIP peer trunk:
• From Domain:
Enter the UCM public address for this UCM (UCM A).
• Transport:
TLS
Figure 28: Peer SIP Trunk->Basic Settings
4. Under Advanced Settings, configure the following options for the SIP peer trunk:
• Enabled Heartbeat Detection: Yes
• ICE Support: Yes