GL offers a comprehensive suite of testing services to verify and ensure quality and reliability of customers’ telecom networks and high-speed fiber optic lines.

• Evaluation and testing of high speed telecom lines (OC-3, OC-12, STM-1 etc.)
  
  
• Evaluation and testing of VoIP, ATM and Central Office switches
  
  
• Assessment and audio survey of public address systems in transit stations
  
  
• Evaluation of tunnel radio coverage
  
  
• Drive testing to verify cellular service coverage