Karel has created the electronic telephone exchange market in Turkey in 1986 with its original designs, provided PBX products to this market and pioneered Turkey's transition from electromechanical systems to electronic systems in communications. Established with hundred percent domestic capital, Karel has the most advanced R&D department in Turkey in communication electronics field today and facilities are compliant with international standards. Today, Karel is the market leader in Turkey that exports products and technologies to more than 30 countries, and is amongst the top 15 manufacturers of the world.

Karel is the market leader in PBXs by far in Turkey according to the reports of all international and national research institutes. Today, more than 700,000 businesses are using Karel PBXs. Over 50% of the business communication traffic is performed via Karel systems in Turkey. Karel is positioned amongst the top 500 industrial organizations in Turkey.

In its main field, namely the telecommunications, Karel develops and produces wired or wireless communication systems with different technologies, features and capacities. Major products consist of special PBXs with small, middle and large capacities and peripherals to these PBXs, IP call centers and etc. in the superstructure class; and rural PBXs and interconnection PBXs in the infrastructure class. Following the advancements in technology closely and being a pioneer in the technology, Karel has reinforced this position with Unified Communication Solutions. Consequently, Karel also operates in the visual communication and security systems field, and performs sales and project based applications for the intruder alarm systems market. Karel sells its products via its own distribution network consisting of Karel authorized dealers domestically, and via distributors abroad. Karel also imports some complementary products in the cover of its activities in the telecommunications field. Karel also carries out turn-key projects for the Public and Private Sector organizations by cooperating with some foreign companies. As an electronic systems manufacturer, Karel mainly operates in the household appliances electronics design and production field in relation with this field of activity.