About TCG TCG is a Business Communications Solutions Provider serving business throughout the United States, with offices in Columbus, Dayton, and Cincinnati, Ohio. At TCG our success is measured by the number of long term clients we have earned by providing industry proven products backed by knowledgeable, responsive service. Telephony Systems. TCG will help your company design, install, and support reliable and affordable telephone and voice mail systems from Toshiba. Toshiba systems support both traditional and Voice over Internet Protocol (VoIP) solutions. TCG supports clients both locally and across the United States through Toshiba's National Account Program Data Systems. TCG will assist your organization with the implementation or upgrade of your Local and Wide Area Network. These service include, but are not limited to, upgrading your existing network to support Voice over IP (VoIP), multi-site connectivity, remote worker connectivity, network security, network backup and disaster recovery. TCG also provides ongoing server and network management and support. Local Carrier Services. TCG can design the best combination of communication circuits available in your area. We accomplish this by partnering with local telephone companies, allowing us to provide our clients with quotes from multiple providers, therefore helping them determine which offering is best for their organization.