Comdial Impact is an industry leader in producing office phone systems for small- to medium-size companies.  Do you need to integrate your branch offices and telecommuters, or expand your services to include a call center, unified messaging, and IP telephony? Comdial handles all those communication challenges with ease. And at a price any business can afford. Dotcom Computers carries a large range of refurbished Impact phones and modules for keeping your legacy system running.