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PBT Telecommunications is a Gilbert, SC-based company in the Telecommunications sector.
Verizon Communications Inc. is an American multinational telecommunications conglomerate and a corporate component of the Dow Jones Industrial Average.
Geetingsville Telephone Co is a Frankfort, IN-based company in the Telecommunications sector.
Business Telephone Systems That Work is a Downers Grove, IL-based company in the Telecommunications sector.
InterCall, a subsidiary of West Corporation, is the largest service provider in the world specializing in conference communications.