PABX Course

Lesson 1 • PABX in the Enterprise Network

Explains how PABX integrates with LAN, WAN, and public telephone networks. Prepares learners for network-aware configuration tasks.

Lesson 2 • Types of PABX Systems

Compares analog, digital, IP, and hybrid PABX platforms. Helps learners select the right system type for a given environment.

Lesson 3 • What Is a PABX System

Defines PABX and its role in enterprise communication. Establishes the baseline vocabulary used throughout the course.

Lesson 1 • Call Signaling and Call Flow

Traces a call from origination through switching to termination. Enables learners to read call logs and identify failure points.

Lesson 2 • Quality of Service Fundamentals

Defines latency, jitter, packet loss, and MOS scores relevant to voice quality. Sets the standard for acceptable PABX performance.

Lesson 3 • VoIP Protocols and Standards

Introduces SIP, H.323, RTP, and RTCP as the protocols driving IP telephony. Prepares learners for IP PABX configuration and troubleshooting.

Lesson 4 • Digital Transmission Concepts

Explains PCM, time-division multiplexing, and digital channel structures. Links digital encoding to PABX trunk capacity planning.

Lesson 1 • Site Survey and Planning

Covers capacity assessment, environmental requirements, and cabling layout planning. Prevents costly installation errors before work begins.

Lesson 2 • Initial Hardware Verification

Describes LED status checks, loopback tests, and hardware diagnostics after installation. Confirms all modules are seated and operational before software setup.

Lesson 3 • Power Systems and Redundancy

Explains UPS sizing, battery backup, and power redundancy configurations. Ensures system availability during power interruptions.

Lesson 4 • Trunk and Extension Wiring

Details termination of analog, digital, and IP trunk interfaces and station wiring. Connects physical wiring to logical port assignments.

Lesson 1 • System Date, Time, and Locale Settings

Configures NTP synchronization, time zones, and regional dial parameters. Ensures accurate call records and correct dialing behavior.

Lesson 2 • Basic Dial Plan Programming

Programs internal, local, long-distance, and emergency dialing rules. Dial plan accuracy directly controls call routing and cost management.

Lesson 3 • Trunk Configuration

Sets up analog, digital, and SIP trunk groups with correct signaling parameters. Trunks are the foundation for all inbound and outbound call routing.

Lesson 4 • Accessing the Administration Interface

Covers console, web GUI, and SSH access methods with credential management. Establishes secure administrative access as the starting point for all configuration.

Lesson 1 • Auto-Attendant and IVR Configuration

Builds menu trees, records prompts, and maps DTMF inputs to destinations. Automates call handling and reduces receptionist workload.

Lesson 2 • Call Recording and Monitoring

Configures on-demand and automatic call recording with storage management. Supports compliance, quality assurance, and training requirements.

Lesson 3 • Call Routing and Hunt Groups

Programs sequential, circular, and simultaneous ring strategies for hunt groups. Optimizes call distribution across available agents or extensions.

Lesson 4 • Conference Calling and Meet-Me Bridges

Sets up internal conference bridges and external dial-in meet-me services. Enables multi-party collaboration through the PABX platform.

Lesson 1 • Toll Fraud Prevention

Programs call barring, international dialing restrictions, and anomaly alerts. Directly reduces financial risk from unauthorized outbound calls.

Lesson 2 • Security Auditing and Compliance

Reviews audit logs, conducts vulnerability scans, and aligns with telephony security standards. Maintains ongoing security posture after initial hardening.

Lesson 3 • PABX Threat Landscape

Identifies toll fraud, eavesdropping, denial-of-service, and vishing threats. Contextualizes security controls within real-world attack scenarios.

Lesson 4 • VoIP Network Security

Applies TLS for signaling, SRTP for media, and firewall rules for SIP traffic. Secures IP telephony at the transport and application layers.

Lesson 1 • Preventive Maintenance Routines

Schedules firmware updates, database backups, and hardware inspections. Reduces unplanned downtime through proactive system care.

Lesson 2 • System Logs and Diagnostic Tools

Uses system event logs, packet captures, and built-in diagnostics to gather evidence. Transforms raw data into actionable fault information.

Lesson 3 • Troubleshooting Methodology

Introduces a structured fault isolation process from symptom to root cause. Provides a repeatable framework applicable to any PABX problem.

Lesson 4 • Common Call Quality Issues

Diagnoses one-way audio, echo, choppy voice, and dropped calls. Links each symptom to its likely network or configuration cause.

Lesson 1 • Capacity Planning and Scaling

Applies Erlang calculations and traffic data to plan trunk and extension growth. Ensures the system meets demand without over-provisioning.

Lesson 2 • Disaster Recovery and Business Continuity

Designs failover routing, standby systems, and recovery time objectives for telephony. Ensures voice services survive hardware or site failures.

Lesson 3 • Call Reporting and Traffic Analysis

Generates CDR reports, traffic studies, and grade-of-service metrics. Converts raw call data into decisions about capacity and routing.

Lesson 4 • User Management and Self-Service

Manages user accounts, delegates limited admin rights, and enables user self-service portals. Reduces helpdesk load while maintaining control.