Sigma Telecom is a telecommunications company specializing in Voice over Internet Protocol (VoIP) services and solutions. The company offers a range of communication services, including wholesale voice termination, retail voice services, and SMS solutions. Sigma Telecom focuses on providing high-quality, reliable, and cost-effective communication services to its clients, which include businesses and telecom operators around the world. The company emphasizes innovation, advanced technology, and customer satisfaction in its operations.