Technology Service and Maintenance

REX’s team of seasoned technicians is on-call 24 hours a day to support and maintain your technology systems.  We understand both the complexity and critical nature of systems such as Access Controls, AV Integrated Systems, and Life Safety systems and are versed in proper maintenance and repair.

Current clients can visit the Technology Service Portal to request service and track progress on open issues.

Our AV Systems Group is regularly called on to assist with repairs and upgrades to video conferencing systems, boardroom presentation and conferencing systems. video walls and displays, huddle room conferencing solutions and intercom, audio and similar systems.

REX Fire Alarm group assist with the turn-up and integration of new devices into existing systems, as well as testing and certification of existing systems.

Our Voice Data group regularly upgrades, tests and certifies data and phone cabling, including Category 5, Cat 6 and fiber optic connections.

Our Security/Access Control group assists with upgrades, additions and maintenance to building access control systems and security/intrusion systems.

Riser Management

REX riser management services provides expert planning and skilled installation of your electrical and technology infrastructure. Your business needs dependable telecommunications and data infrastructure to succeed. From telephones and Internet to card access and satellite feeds, REX provides the solution from inception to completion.

REX is known as the “go-to” full-service electrical contractor that provides the latest in innovative thinking with nearly a century of experience. Our work is found in landmarks of corporate America, to key elements of the Chicago skyline to everyday city and suburban buildings throughout the nation.

REX Riser Management solutions include:

  • Voice/Data Circuit Extensions from Netpop to Tenant’s Server Room
  • Riser Cabling and Conduit both horizontally and vertically
  • Building Audit of Existing Telecommunications Infrastructure
  • Service Call Reports
  • Online Access to Daily Activity Reports and Building Audits
  • Telecom Provider Coordination for New Service Installations
  • 24-Hour Emergency Service


To place a riser-related service request, please send an email to

Security, Access Control & Fire Alarm

REX security systems offer strategies for protection against theft, intruders and property damage. We provide the planning, hardware, power source and installation of high-tech temperature and motion sensors, glass and door break detection and notification systems.

Our access control systems monitor, regulate and restrict admittance to all types of facilities. Variable parameters control access by people, time and locations, featuring keypad and smart card data capture. We also provide and install central station monitoring networks. Sourced by REX, approved contracted remote monitoring services can react to security and safety issues, alerting the proper authorities and contacts.

We have decades of experience with life safety systems, so you can count on us to provide the  system expertise you need. From smoke detection to emergency response notification and smart alarms with audio/visual cues, we can design a comprehensive system that will function in any environment.