What Should I Do if Port 5061 is Blocked? CommPeak SIP Trunking FAQs / What Should I Do if Port 5061 is Blocked? Answer If you're experiencing blocked access, you can connect securely using TLS transport over alternative ports. Alternative Connection Method Details: Protocol: TLS Primary Port: 5061 Backup Port: 5065 (use it if 5061 is blocked). Updated 1 day ago What Are Allowed Ports for CommPeak VoIP Services?What are STUN and TURN in SIP?Ask AITable of Contents Answer