The biggest Internet service providers (ISPs) offer fiber optic access, called fiber-to-the-building (FTTB).
This type of Internet access supports a variety of services, which are offered by most ISPs: IPTV, VoIP, and Video on demand (VOD).
The major ISPs have networks in the following cities: Sofia, Plovdiv, Burgas, Varna, Veliko Tarnovo, Lovech, Ruse and Blagoevgrad.
[citation needed] Asymmetric digital subscriber line (ADSL) technology was introduced in Bulgaria after the privatisation of the state monopoly Bulgarian Telecommunications Company (BTC) in 2004.
[9] The constitution and law prohibit arbitrary interference with privacy, family, home, or correspondence, and the government generally respects these provisions in practice.