PBX (Private Branch Exchange)
A PBX (Private Branch Exchange) is a business phone system that handles both internal and external calls. Think of it as a company's own personal phone network that lets employees make calls to each other using extension numbers, while also managing outside calls from customers. Modern PBX systems are often digital or internet-based (called IP-PBX or VoIP PBX) rather than the old switchboard systems. It's like having a smart traffic controller for all phone calls coming in and out of a business, making sure calls get to the right person or department efficiently.
Examples in Resumes
Managed a 500-seat call center using PBX and IP-PBX systems
Trained staff on Private Branch Exchange operations and maintenance
Reduced call wait times by 40% through optimized PBX call routing configuration
Typical job title: "PBX Administrators"
Also try searching for:
Where to Find PBX Administrators
Professional Networks
Online Communities
Industry Events
Example Interview Questions
Senior Level Questions
Q: How would you handle a complete PBX system failure in a large call center?
Expected Answer: Should explain disaster recovery plans, backup systems, emergency procedures, and how to minimize downtime while maintaining communication with customers and staff.
Q: How would you plan a migration from traditional PBX to VoIP?
Expected Answer: Should discuss assessing current needs, planning for minimal disruption, training requirements, and ensuring proper infrastructure is in place before migration.
Mid Level Questions
Q: How do you set up call routing rules in a PBX system?
Expected Answer: Should explain how to create basic call flows, set up departments, configure hunt groups, and implement basic IVR (automated menu) systems.
Q: What steps do you take to troubleshoot poor call quality?
Expected Answer: Should mention checking network connections, testing phone lines, reviewing system logs, and basic diagnostic procedures.
Junior Level Questions
Q: What is the difference between an internal extension and a direct line?
Expected Answer: Should explain that internal extensions are for internal communication while direct lines connect directly to outside lines.
Q: How do you add a new user to the PBX system?
Expected Answer: Should describe basic user setup process including creating extensions, voicemail setup, and basic permissions.
Experience Level Indicators
Junior (0-2 years)
- Basic phone system operation
- User account management
- Simple troubleshooting
- Basic call routing setup
Mid (2-5 years)
- Advanced call routing configuration
- System maintenance and updates
- Call quality monitoring
- Basic system integration
Senior (5+ years)
- System design and implementation
- Advanced troubleshooting
- Disaster recovery planning
- Team management and training
Red Flags to Watch For
- No experience with modern digital phone systems
- Lack of customer service skills
- No knowledge of basic networking concepts
- Unable to explain basic call routing concepts
Related Terms
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