Chicago Telephone Systems Sales and Repair

VOIP Phone Solutions

GCS Telephone Engineers, fully qualified with 30 years exp. covering Chicagoland area. We specialize in Installing Cabling and fitting new telephone Sockets. Fault finding, Noisy line and broadband faults and repairs. Our phone system technicians perform business telephone system installations for businesses, hospitals, hotels, schools, offices and small businesses in Skokie and Chicagoland.


Our certified technicians will work with you to design, install, and maintain a business phone system that will best meet your company’s needs, whether that’s a basic digital phone system or a modern VoIP phone system. We provide stable, consistent, and reliable telephone systems to businesses of any size.

We sell, install, and service phone systems and telephone equipment of the highest quality. Below is a list of phone systems that we sell, install and configure:

  • Avaya phones Avaya IP Office
  • Start2Star
  • Panterra
  • Digium VoIP
  • SwitchVox – Voice Over IP
  • Lucent
  • BizPhone
  • AT&T Merlin
  • Nortel Norstar, Nortel CICS, Nortel MICS and Nortel BCM
  • Polycom Soundstations and more.

We also deal with voice and data cabling, office relocation, expand or upgrade phone system and telephone repair services. Our telephone specialists are A+ certified and have hands on experience on voice and data cabling.