The Telephony Co.
Website:
thetelephony.co
Job details:
VoIP Support Engineer
Location: Sector 17, Dwarka, New Delhi (On-site)
Company: The Telephony Co (TTC)
About The Telephony Co (TTC)
The Telephony Co (TTC) is a global telecom and cloud solutions company delivering international virtual numbers, wholesale voice services, cloud telephony platforms, and managed cloud infrastructure to businesses worldwide.
We support startups, BPOs, SaaS companies, enterprises, and telecom partners across multiple countries. With a strong focus on uptime, routing efficiency, and service quality, TTC operates in a fast-paced 24x7 telecom environment.
As our global traffic continues to grow, we are strengthening our support team and looking for a skilled VoIP Support Engineer to ensure service stability and customer satisfaction.
Role Overview
The VoIP Support Engineer will be responsible for monitoring, maintaining, and troubleshooting TTC’s VoIP infrastructure and customer deployments.
This role requires strong technical expertise in SIP signalling, routing, and call quality diagnostics. The candidate must be comfortable working in rotational shifts, including night shifts, in a live telecom operations environment.
You will play a critical role in ensuring high-quality voice delivery across customer and vendor networks.
Key Responsibilities
Troubleshoot and resolve VoIP-related customer issues.
Analyze SIP call flows, RTP/media issues, signalling errors, NAT/firewall problems, and codec mismatches.
Configure and manage call routing, DID provisioning, IVR flows, and SIP trunk setups.
Support and maintain VoIP switches (Class 4 and Class 5) and PBX platforms.
Monitor call quality metrics such as ASR, ACD, PDD, packet loss, jitter, and MOS.
Coordinate with upstream carriers and vendors for testing and issue resolution.
Provide technical support via calls, chat platforms, ticketing systems, and collaboration tools.
Handle escalations, perform Root Cause Analysis (RCA), and ensure timely closure.
Maintain technical documentation including network diagrams, routing logic, and vendor reports.
Work in rotational shifts, including night shifts and on-call support as required.
What We’re Looking For
2–4 years of hands-on experience in VoIP/Telecom support.
Strong understanding of:
SIP signalling and SIP call flows
RTP and media handling
Codecs and VoIP protocols
Experience working with VoIP switches (Class 4 and Class 5).
Knowledge of call routing logic, DID management, IVR configuration, and SIP trunking.
Ability to analyze SIP logs, Wireshark captures, and CDR records.
Understanding of NAT, firewalls, SBCs, and Linux-based systems.
Experience coordinating with telecom vendors and carriers.
Strong communication skills for interacting with customers and partners.
Problem-solving mindset with ability to work independently and in a team.
Strong Advantage (Nice to Have)
Experience with 3CX platform.
Exposure to wholesale VoIP environments.
Experience supporting international traffic routing.
Familiarity with cloud-hosted PBX environments.
Why Join TTC?
Work in a live global telecom environment.
Exposure to international voice routing and carrier networks.
Opportunity to work on both enterprise and wholesale traffic.
Performance-driven, growth-oriented culture.
Direct impact on service quality and customer experience.
Click on Apply to know more.