- Our alliance partners EIT has over years in the industry and provides engineering, pre-assembly, equipment supply, turn-key installation, project management, and support services for: Digital Central Office applications; Transmission systems including T1, SONET, ADSL, VoIP; Power systems including -48V and +24V plants, batteries and UPS systems; BIT BOSSTM Protocol Manager; and Wireless systems, ...www.eit.ca