The complete engineer's guide to voice on 5G: the IMS, SIP/SDP, registration, the 5QI-1 QoS flow, the end-to-end VoNR call, EPS fallback, mobility, VoWiFi, emergency calling, roaming, security, charging, KPIs and SIP/RTP troubleshooting — explained with the depth practitioners actually need.
Not a glossary and not a slide deck — a structured build-up from why a voice packet is special to signing off that a network can carry it. Every chapter ends with a summary and interview-grade review questions.
The CSCFs, TAS, HSS/UDM, MRF and the SBC — and SIP/SDP read line by line, so any voice trace becomes a transcript you can follow.
IMS & 5G registration, the IMS PDU session and P-CSCF discovery, and the full SIP INVITE flow with preconditions — traced message by message.
5QI-1/GBR/ARP, the PCF and PCC rules that build the voice flow, the RTP/RTCP path and SBC anchoring, and codecs (AMR/EVS, DTX, DTMF).
Why most "5G calls" are fallback today, redirect vs N26 handover, voice-interruption analysis, SRVCC, and VoWiFi over ePDG/N3IWF.
5G emergency calling with location, S8HR/SEPP roaming voice, IPsec/SRTP and lawful intercept, plus online/offline charging.
Decode SIP failures, hunt one-way audio, cut setup delay, design VoNR KPIs, read QXDM/UE logs and Wireshark — then the operator launch checklist.
Chapters 1–4 — the voice problem, the IMS architecture, SIP/SDP, and the three voice modes — are completely free, no signup. Open the Kindle-style reader, switch between paper, sepia and dark themes, and judge the depth before you spend $4.99.
A fixed chapter sidebar, three reading themes, font sizing, reading progress, and 120+ diagrams that re-theme with the page. Built for long, focused reading — on desktop and mobile.
Plus 5 appendices: a full glossary, the standards bodies map, a hands-on open-source lab guide, 50 interview questions, and reusable reference-architecture templates.
A one-time payment, instant online access, free updates. Read the free preview first to confirm it fits.
Yes — chapters 1 to 4, the entire Foundations part, are completely free with no signup. Open the reader, try all three themes, and confirm the depth before you buy.
Instant online access. After payment via Razorpay the full 29-chapter Kindle-style reader unlocks immediately in your browser — chapter sidebar, three themes, font sizing, progress tracking — with lifetime access. No subscription, no recurring fees.
₹499 if you pay from India, $4.99 internationally. Pick your currency on the buy panel above. One-time payment, lifetime access.
Yes. It is grounded in 3GPP (TS 23.228 IMS, TS 23.501/23.502 5GS, TS 24.229 SIP profile), the IETF SIP/SDP/RTP RFCs, and GSMA IR.92/IR.94/NG.114 — focused on the architecture, procedures and troubleshooting an engineer actually uses.
Basic 4G/5G architecture familiarity helps, but Part I builds the foundations from scratch — from why voice is special to the IMS and SIP. RAN, core, voice, test and optimization engineers all get value.
Yes. Chapter 22 and Appendix C walk you through standing up a complete 5G network on a laptop with free open-source tools — Open5GS/free5GC, UERANSIM, Kubernetes, Prometheus — and fourteen labs tied to the chapters.
Because it's a digital product with instant access and a free 4-chapter preview, sales are final once unlocked. Please read the free preview first to confirm it fits your needs.
29 chapters, 120+ diagrams, a Kindle-style reader and lifetime access — for less than a coffee.
Get the book — $4.99 / ₹499