Provide Tier 1 and Tier 2 technical support for VoIP-related issues (call drops, latency, registration failures, etc.). Troubleshoot and resolve issues related to SIP, RTP, codecs, NAT, and firewall traversal. Assist with provisioning, configuring, and supporting VoIP devices (IP phones, ATAs, softphones). Support and manage IP PBX systems (e.g. FreeSWITCH, FreePBX, Asterisk, 3CX, Cisco, Grandstream). Work with SIP trunk providers to diagnose and resolve connectivity or call-routing problems. Monitor system alerts and logs to proactively identify and address network or VoIP issues. Document troubleshooting steps, common issues, and customer configurations. Collaborate with engineering teams to escalate unresolved or complex issues. Educate clients and internal users on best practices for VoIP usage and setup. Job Types: Full-time, Permanent Pay: ₹30,000.00 - ₹45,000.00 per month Work Location: In person