Business Details
50+ Years
experience
Emergency
services
Trusted Phone & Networking Services in Collinsville, IL
Commercial Telephone Systems has been delivering superior communication solutions and networking services to businesses since 1974. Our team of Avaya-certified technicians and highly trained professionals specialize in phone system installations, networking services, and emergency repairs, serving the St. Louis Metro area and Illinois. With decades of experience, we prioritize customer satisfaction through customized solutions, remote and on-site support, and partnerships with leading brands like Avaya, ESI, and Nortel.Our commitment to reliability and technical expertise ensures seamless operations for clients across industries, including healthcare, education, and government. We distinguish ourselves through prompt service, transparent communication, and a focus on long-term client relationships, as evidenced by thousands of satisfied customers and decades of industry recognition.
Services
Phone System Installation
Networking Services
Emergency Repairs
Structured Cabling
Access Control Systems
Cellular Amplifiers
Video Surveillance
Power Backup Solutions
Details
- Year established: 1974
Highlights and features
- Decades of experience serving St. Louis and Illinois businesses since 1974
- Customized communication solutions tailored to specific business requirements
- 24/7 emergency support with same-day service availability
- Certified technicians for leading brands including Avaya and ESI
- Proven track record with 5,000+ solutions sold and 200+ years of collective telecom experience
Associations and certifications
- Avaya Business Partner
- Avaya-certified
What people say
Prompt service
Great support
Knowledgeable staff
Reliable solutions
Timely responses
Services
Phone System Installation
We install and upgrade business phone systems including Avaya, ESI, and Nortel models. Our certified technicians handle all aspects from cabling to programming, ensuring seamless integration with existing infrastructure. Clients benefit from reduced downtime and enhanced communication capabilities through modern, scalable solutions.
Networking Services
Our networking experts design and implement LAN, WLAN, and SD-WAN systems tailored to business needs. Services include cable management, firewall setup, and cloud-managed switches that improve connectivity and security. Businesses gain reliable infrastructure supporting IoT devices and multi-location operations.
Emergency Repairs
We provide urgent repair services for telecom and networking failures with same-day response. Technicians resolve issues remotely or on-site, minimizing operational disruption. Clients receive priority handling for critical system outages through our dedicated emergency service line.
Structured Cabling
We install and organize voice and data cabling systems using Cat 5e to Cat 7 standards. Services include patch panel cleanup and fiber optic installation that ensure optimal network performance. Businesses achieve cleaner infrastructure with improved scalability and maintenance efficiency.
Access Control Systems
We implement electronic access control systems with card readers and IP controllers to secure facilities. Solutions include remote monitoring and integration with existing security infrastructure. Clients gain enhanced protection for sensitive areas while maintaining flexible access management.
People
Ron R.
Sales Representative
Avaya-certified professional with extensive experience in phone system programming and business communication solutions. Known for prompt service and client-focused improvements.
Darren Windau
Technician
Expert in system installations and training, recognized for quick implementation of advanced phone features and exceptional customer support.
Geoff
Installer
Skilled technician praised for thorough training and outstanding customer service during system expansions and upgrades.
Tom
Technician
Experienced in rapid deployment of telecom systems and network devices, providing efficient solutions for emergency and scheduled installations.
Dan
Technician
Flexible and responsive technician supporting multi-building system expansions with expert training and customization capabilities.
Questions
What phone systems do you support?
We support Avaya, ESI, Nortel, Norstar, Partner ACS, Vertical, Samsung, Panasonic, and legacy systems.
Do you offer emergency repair services?
Yes, we provide 24/7 emergency support with same-day service availability for critical system failures.
What networking services do you provide?
We offer LAN/WLAN setup, SD-WAN solutions, firewall configuration, and structured cabling for businesses.
Are your technicians certified?
Yes, our team includes Avaya-certified professionals and experienced technicians for all supported systems.
Do you serve areas outside St. Louis?
We serve Southern Illinois, Chicago, Springfield, and surrounding regions with on-site and remote support.
Can you upgrade existing phone systems?
Yes, we modernize legacy systems and implement scalable solutions tailored to current business needs.
