SDH/SONET
SDH/SONET refers to two closely related technologies (Synchronous Digital Hierarchy and Synchronous Optical Network) used in telecommunications networks to send large amounts of data over fiber optic cables. Think of it like a highly organized highway system for digital information, ensuring data travels reliably between locations. While newer technologies are now available, many telecommunication companies still use and maintain SDH/SONET equipment, especially in established networks. It's similar to how some companies still use older but reliable telephone systems alongside newer technology.
Examples in Resumes
Managed and maintained SDH/SONET network equipment across 5 regional locations
Troubleshot SONET and SDH transmission issues in carrier-grade networks
Led upgrade project converting legacy SDH systems to modern network technology
Typical job title: "Network Engineers"
Also try searching for:
Where to Find Network Engineers
Professional Organizations
Online Communities
Professional Networks
Example Interview Questions
Senior Level Questions
Q: How would you handle a major SDH/SONET network outage affecting multiple customers?
Expected Answer: A senior engineer should explain their systematic approach to problem-solving, including network monitoring tools, backup systems, customer communication protocols, and recovery procedures while minimizing service disruption.
Q: Describe your experience with network modernization projects involving SDH/SONET equipment.
Expected Answer: Should demonstrate knowledge of planning network upgrades, managing risk during transitions, maintaining service continuity, and coordinating with multiple teams and vendors.
Mid Level Questions
Q: What steps do you take to prevent network failures in SDH/SONET systems?
Expected Answer: Should discuss regular maintenance procedures, monitoring practices, backup systems, and preventive measures to ensure network reliability.
Q: How do you troubleshoot connectivity issues in a SDH/SONET network?
Expected Answer: Should explain their systematic approach to identifying problems, using testing equipment, and following standard troubleshooting procedures to resolve network issues.
Junior Level Questions
Q: What basic monitoring tools do you use for SDH/SONET networks?
Expected Answer: Should be familiar with basic network monitoring tools and able to explain how they help identify potential network problems.
Q: What safety procedures do you follow when working with fiber optic equipment?
Expected Answer: Should demonstrate understanding of basic safety protocols when handling fiber optic cables and network equipment.
Experience Level Indicators
Junior (0-2 years)
- Basic network monitoring
- Equipment maintenance
- Cable management
- Understanding of fiber optics basics
Mid (2-5 years)
- Network troubleshooting
- Performance monitoring
- Basic network design
- Customer support coordination
Senior (5+ years)
- Network architecture planning
- Project management
- Team leadership
- Network modernization expertise
Red Flags to Watch For
- No hands-on experience with fiber optic equipment
- Lack of knowledge about basic network safety procedures
- Unable to explain basic troubleshooting steps
- No experience with network monitoring tools
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