Providing services to the largest telecom and cable TV providers as well as telecom system manufacturers obligates FCA to maintain the highest standards of quality applicable to modern optical networks. These claims are supported by a list of references from telecommunications and IT market leaders.
The key clients of FCA include:

• Telekomunikacja Polska S.A.
  
• Netia S.A.
  
• Polkomtel S.A. (Plus GSM)
  
• Polska Telefonia Cyfrowa Sp. z o.o. (ERA GSM)
  
• GTS Energis Sp. z o.o.
  
• Exatel S.A.
  
• ASTER Sp. z o.o.
  
• Multimedia Polska S.A.
  
• Alcatel-Lucent
  
• Nokia Siemens Networks