Profile: Telcom Marketing Group, Inc. manufactures telephone equipment. Our products include full size phones, mini phones, pedestals & mounts and visitation phones. The CT-1000-SS-VC full size inmate telephone has 14 gauge steel housing and mounts directly to wall or to a TM-178A backboard. The CT-400-SS-VC mini inmate telephone has 14 gauge steel housing and mounts directly to wall, a TM-4000-BB backboard, a TM-4500-BB backboard with conduit fittings or to a TM-178A backboard with adapter TM-178A-ADP-400.