Fixed Telephony Course

Lesson 1 • Core Telephony Concepts and Terminology

Defines essential vocabulary: circuits, channels, trunks, and signaling. Provides shared language used throughout the entire course.

Lesson 2 • Regulatory and Standards Framework

Introduces the regulatory bodies and technical standards governing fixed telephony. Students recognise compliance obligations and interoperability requirements.

Lesson 3 • Anatomy of a Fixed Telephone Network

Maps the physical and logical layers of a fixed network from subscriber to core. Students identify each layer's function and interconnection.

Lesson 1 • Analogue Line Testing and Fault Diagnosis

Introduces test equipment and measurement techniques for analogue copper pairs. Students perform continuity, insulation, and noise tests.

Lesson 2 • Dual-Tone Multi-Frequency Dialing

Details DTMF tone pairs, detection methods, and dialing sequences. Students apply DTMF knowledge to configure and test analogue endpoints.

Lesson 3 • Analogue Signal Characteristics

Covers frequency, amplitude, and waveform properties of voice signals. Connects physical signal behaviour to transmission quality outcomes.

Lesson 1 • Voice Codecs and Compression

Surveys codec standards from G.711 to narrowband and wideband variants. Students select appropriate codecs based on quality and bandwidth trade-offs.

Lesson 2 • Pulse Code Modulation Principles

Covers sampling, quantisation, and encoding steps that convert analogue voice to digital data. Establishes the technical basis for all digital telephony.

Lesson 3 • Digital Transmission Interfaces

Describes physical and electrical specifications for E1, T1, and J1 interfaces. Students connect and configure digital line interfaces correctly.

Lesson 1 • PBX Features and Call Routing

Covers call forwarding, transfer, conferencing, hunt groups, and auto-attendant. Students programme and test these features in a lab environment.

Lesson 2 • IP-PBX and Hybrid Systems

Introduces IP-PBX platforms that support both TDM and IP endpoints simultaneously. Students compare legacy PBX with IP-PBX deployment models.

Lesson 3 • Private Branch Exchange Architecture

Describes PBX hardware components, software modules, and trunk interfaces. Students identify each component's role in call processing.

Lesson 4 • Circuit Switching Fundamentals

Explains dedicated path establishment, hold, and release in circuit-switched networks. Provides the switching baseline before introducing packet alternatives.

Lesson 1 • SS7 Network Architecture

Maps SS7 network nodes, signalling links, and link sets. Students identify STP, SSP, and SCP roles in call processing.

Lesson 2 • SS7 Protocol Stack

Explains MTP levels 1-3, SCCP, TCAP, and ISUP layers. Students map each layer's function to real call-control scenarios.

Lesson 3 • ISDN Layer 2 and Layer 3 Signaling

Details LAPD frame structure and Q.931 call-control messages. Students trace a complete ISDN call from SETUP to RELEASE.

Lesson 4 • ISDN BRI and PRI Interfaces

Covers BRI 2B+D and PRI 23B+D or 30B+D channel structures and physical layers. Students configure ISDN interfaces and verify layer status.

Lesson 1 • PSTN-to-VoIP Gateway Functions

Explains media and signalling conversion between TDM and IP domains. Students configure gateway dial peers and codec negotiation.

Lesson 2 • Voice Quality Measurement and QoS

Covers MOS scoring, jitter, latency, and packet loss impact on voice quality. Students apply QoS marking and queuing to protect voice traffic.

Lesson 3 • SIP Trunk Provisioning and Testing

Guides students through SIP trunk configuration, registration, and acceptance testing. Students verify call routing, failover, and capacity limits.

Lesson 4 • VoIP Architecture and Protocols

Introduces SIP, H.323, RTP, and RTCP roles in IP voice communication. Students map each protocol to its function in a VoIP call.

Lesson 1 • Configuration and Change Management

Covers configuration backup, version control, and change-control procedures for telephony systems. Students execute a controlled change on a live system.

Lesson 2 • Fault Management and Incident Response

Establishes a structured fault-management process from detection to resolution. Students apply root-cause analysis to telephony outage scenarios.

Lesson 3 • SNMP and Alarm Management

Covers SNMP versions, MIB structure, and trap handling for telephony equipment. Students configure SNMP agents and build alarm correlation rules.

Lesson 4 • Performance Monitoring and KPIs

Defines telephony KPIs: answer seizure ratio, call completion rate, and post-dial delay. Students collect and interpret performance data from network elements.

Lesson 1 • Unified Communications Integration

Explores how fixed telephony integrates with UC platforms for messaging, presence, and video. Students map telephony services to UC feature sets.

Lesson 2 • TDM-to-IP Migration Planning

Provides a structured methodology for migrating legacy TDM infrastructure to IP-based platforms. Students assess readiness and sequence migration phases.

Lesson 3 • Network Resilience and High Availability

Covers redundancy architectures, failover mechanisms, and disaster recovery for telephony. Students design a highly available call-processing topology.

Lesson 4 • Strategic Capacity and Technology Roadmap

Guides students in building a multi-year technology roadmap aligned with business growth. Students forecast traffic, budget upgrades, and evaluate emerging technologies.