foreign investment in the form of joint business ventures greatly improved telephone service; Internet services available throughout most of the country; about 150,000 unfilled subscriber requests domestic: local - the Ministry of Transport and Communications is expanding cellular telephone services to form rural networks; intercity - highly developed fiber-optic backbone (double loop) system presently serving at least 16 major cities (1998) international: fiber-optic cables to Finland, Sweden, Latvia, and Russia provide worldwide packet-switched service; two international switches are located in Tallinn