Lasting phones is a popular product used today. The device operates based on small-power radio waves emitted by a fixed machine, communicating with each other from a distance of several dozen meters to several kilometers. Because of its utility, extended phones are widely used for the protection of buildings or businesses with 1 to 2 trunk lines ... As a reputable unit that provides products for phones about and other telecommunications equipment, GTC TELECOM has a full range of models, extended phone types with guaranteed quality. You will own a phone that lasts for a long time with the most competitive price.GTC TELECOM - Your first choice