Telephone Switching Course
Master telephone switching with practical skills in PSTN, VoIP, SIP, SS7, QoS, and network design. Learn to plan capacity, secure voice traffic, troubleshoot with pro tools, and lead reliable PSTN-to-IP migrations in modern telecom networks.

4 to 360 hours of flexible workload
valid certificate in your country
What Will I Learn?
The Telephone Switching Course gives you a focused, practical path to master circuit and packet voice, from TDM fundamentals and SS7/ISUP to VoIP, SIP, RTP, and media gateways. Learn QoS, capacity planning, codec selection, and high availability, then explore migration strategies, interworking, and troubleshooting tools so you can design, optimize, and maintain reliable, high-quality voice networks.
Elevify Differentials
Develop Skills
- Design VoIP capacity: dimension trunks, concurrent calls, and QoS budgets.
- Configure SIP, RTP, and codecs for reliable, high‑quality packet voice transport.
- Implement secure voice: SRTP, SIP TLS, NAT traversal, and firewall policies.
- Integrate PSTN and IP: SS7–SIP interworking, media gateways, and call flows.
- Troubleshoot voice networks using Wireshark, CDRs, MOS tools, and RTP analysis.
Suggested Summary
Before starting, you can change the chapters and workload. Choose which chapter to start with. Add or remove chapters. Increase or decrease the course workload.What our students say
Your classes are perfect. I purchased the one-year package and finally have the chance to follow several topics I'm interested in without having to switch platforms... thank you for everything you do, I've already recommended you to others...

Giulio CarloDigital Marketing Student
I like how the lessons get straight to the point and how I can switch chapters and skip content I don't need.

Mariana FerresPhotography Student
I like the content and the way the videos are presented and transcribed, which speeds up the process!

Luciana AlvarengaNail Design Student
The platform is fast and easy to use. The variety of content and the supplementary videos really help with learning.

Giulio CarloPrompt Engineering Student
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