Quick Answer (TL;DR)
To create a PE-TM mapping chain on the Airtel DLT portal, log in and navigate to Manage SMS Workflow > Register New PE-TM Mapping. Click Start Creating, search for your Telemarketer using their DLT ID or Name, select them, and click Proceed. Finally, click Save to send an approval request to the Telemarketer, making your SMS traffic compliant with TRAI TCCCPR guidelines.