9 modules · 48 cinematic lessons · 21 labs · certification

VoLTE Optimization,
the definitive Ericsson course

Every lever that makes voice over LTE excellent — parameter optimization, feature trials (FAJ/CXC, activation→observe→rollback), complete testing and detailed configuration — taught on a real live tri-band node, not slides. TTI Bundling to SRVCC, QciProfile to PDCCH outer loop, counter bible to golden-parameter audit.

▶ Watch Lesson 1 — free Browse the full curriculum
48
animated lessons
85+
real FAJ features
21
engineer labs
6,027
golden params used
25.Q4.4
CPI baseline
NO FAKE THINGS

Every feature is cited by its real FAJ/CXC identity from Ericsson CPI LTE RAN 25.Q4.4. Every parameter is a real MOM attribute. Every "live value" comes from an actual 25.Q3 production node (anonymized). Every recommended value comes from a real operator golden parameter file. Every PM counter is verified against the node's measurement inventory.

The curriculum

One real tri-band node threads through the whole course: Module 1 dissects its VoLTE configuration, every later lesson tunes it, the capstone audits it cold. New lessons unlock weekly for subscribers.

M1The VoLTE Machine — Anatomy & Configuration of a Real Node6 lessons · 3 labs · quiz›
1-1The Life of a VoLTE Call, End-to-EndFREE PREVIEW▶ Play
1-2QCI on Ericsson: the QciTable MO Walk (qci1/qci5, real values)NEW▶ Play
1-3The E-RAB Ladder: How QCI-1 Gets Built (S1AP IE decode)NEW▶ Play
1-4Your Weapons: moshell, kget, MOM, CPI, Golden FilesNEW▶ Play
1-5The VoLTE KPI Tree (accessibility · retainability · integrity)NEW▶ Play
1-6Feature Governance: FeatureState, CXC, LicensingNEW▶ Play
M1📖 Module 1 Theory — The VoLTE Machine (book-style technical reference)THEORY▶ Read
M2Getting In — Call-Setup & Accessibility Optimization7 lessons›
2-1Access Barring with a Voice Heart (FAJ 121 4329)NEW▶ Play
2-2Optimized VoLTE Access at High Load (FAJ 121 5062)NEW▶ Play
2-3The Admission Control Family (Basic · Differentiated · Dynamic GBR)NEW▶ Play
2-4Robust Call Setup: Delayed Mobility & Robust SRVCC at SetupNEW▶ Play
2-5Re-establishment That Saves Calls (Multi-Target, FAJ 121 3023)NEW▶ Play
2-6Paging the Voice User First (Priority Paging)NEW▶ Play
2-7Emergency Calls: the Non-Negotiable PathNEW▶ Play
M2📖 Module 2 Theory — Getting In (book-style reference + 6 KPI-optimization case studies)THEORY▶ Read
M3The Scheduler — Air-Interface Efficiency for Voice8 lessons›
3-1Scheduler Internals & the QoS-Aware Scheduler (FAJ 121 0859)NEW▶ Play
3-2Delay-Based Scheduling and Grant Estimation (FAJ 121 1789)NEW▶ Play
3-3Prescheduling & VoLTE Prescheduling (FAJ 121 5470)NEW▶ Play
3-4SR & PUCCH: the Voice Control-Channel BudgetNEW▶ Play
3-5VoLTE Frequency Hopping & Uplink FSS (FAJ 121 4224)NEW▶ Play
3-6Adaptive Codeword Selection for VoLTE (FAJ 121 5874)NEW▶ Play
3-7Zero Interference VoLTE Operation (FAJ 121 5235)NEW▶ Play
3-8Carrier Aggregation vs the Voice Call (FAJ 121 4884)NEW▶ Play
M3📖 Module 3 Theory — The Machine Room (book-style reference + 6 KPI-optimization case studies)THEORY▶ Read
M4The dB War — Coverage & Link Robustness7 lessons›
4-1TTI Bundling: 4 Subframes, +4 dB (FAJ 121 2051, full thresholds)NEW▶ Play
4-2Robust Uplink Link Adaptation for VoLTE (FAJ 121 5699)NEW▶ Play
4-3RoHC: Shrinking 40 Bytes of Header to 3 (FAJ 121 0892)NEW▶ Play
4-4PDCCH for Voice: the Control-Channel Outer Loop + Power BoostNEW▶ Play
4-5Uplink Power Control for Voice (pZeroNominal, alpha, fractional PC)NEW▶ Play
4-6HARQ as a Voice Feature (dlMaxHARQTxQci, service-specific HARQ)NEW▶ Play
4-7The Out-of-Coverage Edge CaseNEW▶ Play
M4📖 Module 4 Theory — The dB War (book-style reference + 6 KPI-optimization case studies)THEORY▶ Read
M5DRX — Battery vs Latency, Resolved4 lessons›
5-1DrxProfile Anatomy: Reading the Real 20 (SF40 vs SF320)NEW▶ Play
5-2Service-Specific DRX & drxPriority (FAJ 121 3011)NEW▶ Play
5-3Adaptive DRX: UE-Assisted & Efficient DRX/DTXNEW▶ Play
5-4The Inactivity Economics of a Voice Call (FAJ 121 5181)NEW▶ Play
M5📖 Module 5 Theory — The Sleep Schedule (book-style reference + 5 KPI-optimization case studies)THEORY▶ Read
M6Mobility — Keep the Call Alive7 lessons›
6-1VoLTE-Triggered Mobility: UL & DL Quality Triggers (FAJ 121 5433/5686)NEW▶ Play
6-2ReportConfig for Voice: Events with a QCI-1 Accent (A5UlVolte)NEW▶ Play
6-3Coverage-Triggered Session Continuity & IFHO (layer cascade)NEW▶ Play
6-4Service-Triggered & Multi-Layer MobilityNEW▶ Play
6-5SRVCC: the Organized Retreat (FAJ 121 2027)NEW▶ Play
6-6Handover Self-Optimization for QCI-1NEW▶ Play
6-7VoLTE under EN-DC: Voice While 5G-AnchoredNEW▶ Play
M6📖 Module 6 Theory — The Motion (book-style reference + 6 KPI-optimization case studies)THEORY▶ Read
M7Voice Quality Engineering — the Integrity Module5 lessons›
7-1Codec Rate Control from the RAN: AMR-WB/EVS (FAJ 121 5014)NEW▶ Play
7-2RLC UM: the Discipline of Not RetransmittingNEW▶ Play
7-3The 280-ms Budget: Delay, Jitter & AQMNEW▶ Play
7-4Packet-Loss Forensics & MOSNEW▶ Play
7-5Transport QoS: DSCP Done Right (+ TWAMP proof)NEW▶ Play
M7📖 Module 7 Theory — The Sound Itself (book-style reference + 5 KPI-optimization case studies)THEORY▶ Read
M8Measure, Trial & Test — the Scientific Method7 lessons›
8-1The VoLTE Counter Bible (pmErab*/pmPdcp* per-QCI families)NEW▶ Play
8-2Building the VoLTE War-Room DashboardNEW▶ Play
8-3UE & Cell Traces for Voice (CQI/SINR trace events)NEW▶ Play
8-4Feature Trial Protocol: Activate → Observe → DecideNEW▶ Play
8-5The Golden-Parameter Audit (kget × golden file diff)NEW▶ Play
8-6The Complete VoLTE Acceptance TestNEW▶ Play
8-7Troubleshooting Playbooks: the Big FourNEW▶ Play
M8📖 Module 8 Theory — The Instruments (book-style reference + 5 KPI-optimization case studies)THEORY▶ Read
MAPKPI Optimization Atlas — Mind Map & Handbookinteractive map · 72 nodes · parameter bible›
🧠VoLTE KPI Optimization Mind Map — interactive: VoLTE → every KPI → failure counters → feature + recommended setting (click, zoom, search)MIND MAP▶ Open
★🧰 Optimization Design — the Handbook (parameter bible · KPI formulas · moshell scripts · 3 full optimization designs: configuration / voice quality / mute calls)HANDBOOK▶ Read
M9Capstone — Own the Node2 lessons + certification exam›
9-1Capstone Audit: the Reference Node, Cold (find every dormant lever)NEW▶ Play
9-2Trial Program Design: 10 Features, One QuarterNEW▶ Play
9-3Certification Exam (timed · 70% pass · certificate)🔒
M9📖 Module 9 Theory — Owning the Node (book-style reference + program-level scenarios)THEORY▶ Read

What you will be able to do

Outcomes, not topics — each is exercised by labs and tested in the certification exam.

Parameters

  • Audit any node's full VoLTE configuration against golden values — with exception handling
  • Tune QciProfilePredefined, DrxProfile, TTI bundling thresholds, PDCCH VoLTE outer loop, power control — with documented justification
  • Read any kget cold: enums, structs, references, per-QCI vectors

Feature trials

  • Take any of 85+ VoLTE-relevant FAJ features from license check to verdict
  • Design baseline → activate → observe → accept/rollback protocols with KPI guardrails
  • Sequence a one-quarter, 10-feature trial program without interactions

Testing

  • Author a complete VoLTE acceptance test: setup matrix, long-call, mobility routes, edge-of-coverage
  • Configure and read UE/cell traces down to CQI/SINR events
  • Compute the full KPI tree from raw per-QCI counters

Diagnosis

  • Run the Big Four playbooks: accessibility dips, drop spikes, one-way audio, MOS degradation
  • Split drops into handover / transport / UE-lost branches from cause counters
  • Decide parameter vs feature vs escalation — and defend it

One price. Everything.

Lesson 1 is free forever. The rest unlocks with a yearly pass.

$14.99
per year · 12 months of access from purchase
  • All 48 cinematic lessons (released weekly)
  • All 21 labs with worked solution keys
  • 9 module quizzes + certification exam & certificate
  • The golden-parameter audit method & templates
  • Every future update to the course during your year
⚡ Enroll now — $14.99/year

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