Telephone Switching Course
This course delivers hands-on training in telephone switching for PSTN and VoIP networks. Master SS7/ISUP, SIP, RTP, QoS optimisation, secure voice with SRTP and TLS, PSTN-IP integration via media gateways, capacity planning for trunks and calls, and pro troubleshooting using Wireshark, CDRs, MOS, and RTP tools to build and maintain top-notch telecom voice systems.

from 4 to 360h flexible workload
valid certificate in your country
What will I learn?
Gain practical expertise in telephone switching, covering TDM basics, SS7/ISUP, VoIP protocols like SIP and RTP, media gateways, QoS management, capacity planning, codec choices, high availability setups, migration paths, interworking solutions, and troubleshooting for robust voice networks.
Elevify advantages
Develop skills
- Design VoIP capacity by sizing trunks, handling concurrent calls, and budgeting QoS.
- Set up SIP, RTP, and codecs to ensure reliable high-quality packet voice delivery.
- Deploy secure voice features including SRTP, SIP TLS, NAT traversal, and firewall rules.
- Connect PSTN with IP networks through SS7-SIP interworking, media gateways, and call flows.
- Diagnose voice network issues with Wireshark, CDRs, MOS tools, and RTP packet 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
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