- Hastings Communication Services
 - Ivron Systems
- Develops hardware and software platforms for sharing web-based and business documents over ISDN and LAN/IP networks.
- Rochelle Communications, Inc.
- Telecommunications test equipment for R&D, manufacturing, and field service.
- SureCom Corporation
- Specializing in telephone systems, computer networking, cabling, Internet access, and voice mail services.
- Technology Futures, Inc.
- We provide custom research, consulting, seminars, and publications to professionals involved in planning for new technologies and markets.
- teleNetwork, Inc.
- Provides telephone and Internet services.
- Telephone Concepts, Inc.
- Texas Statewide Telephone Cooperative, Inc.
- Statewide organization that represents the interests of Texas' rural independent telephone systems.
- Voice Mail Plus
- VoiceText
- Conference call centre providing teleconferencing, fax on demand, voice mail, and other services.
- Westel, Inc
- Communication services for outbound long distance programs.
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