ocr: LOCAL EXCHANGE CARRIERS GTE: BelSouth, BellAtantic Amentech: Nynex SBC Communications US.West Pacific: Telesis. Fronter: Soutaern New: England.Telecom CincimnatiBels Teiepnone & Data: Systems J 4,000 8,000 12,000 16,000 20,000 Figure 1. The local telephone service business had 1995 revenues of$115 billion, 78 percent of which went to the. seven RBOCS, according to the Gartner Group Stamford, CT). GTE, which provides. service 10 many ofthe Baby Bell regions, has greater revenues than any RBOC. There are ore than 1,200 local exchange carriers in the United States,