Telephone Switching Course
Dive into telephone switching with hands-on expertise in PSTN, VoIP protocols like SIP and SS7, QoS optimisation, and network design principles. Master capacity planning, voice security measures, professional troubleshooting techniques, and smooth transitions from PSTN to IP in today's telecom environments, ensuring reliable and efficient voice services.

from 4 to 360h flexible workload
valid certificate in your country
What will I learn?
This course offers a practical guide to mastering telephone switching, covering TDM basics, SS7/ISUP, VoIP, SIP, RTP, and media gateways. You'll gain skills in QoS management, capacity planning, codec choices, high availability setups, migration plans, interworking solutions, and troubleshooting for building and maintaining top-notch voice networks.
Elevify advantages
Develop skills
- Design VoIP capacity by sizing trunks, handling concurrent calls, and budgeting for QoS.
- Set up SIP, RTP, and codecs to ensure dependable, high-quality packet voice delivery.
- Deploy secure voice systems with SRTP, SIP TLS, NAT handling, and firewall rules.
- Link PSTN and IP networks via SS7-SIP interworking, media gateways, and call flows.
- Diagnose voice network issues using Wireshark, CDRs, MOS metrics, and RTP tools.
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 workloadWhat our students say
Your classes are perfect. I got 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 extra videos really help with learning.

Giulio CarloPrompt Engineering Student
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