- A-1 Telephone Answering Machs
- Amarillo Televoice
- American Business Comms
- Arial Phone
- Arial Phone
- Aspect Communications
- B & B Networks Inc
- Business Telecommunication
- Celebration Computer Systems
- Communication Technology Sltns
- Commworld Nationwide
- Commworld Nationwide
- CSR Systems
- Dictaphone Corp
- Digital Voice Systems Inc
- Digital Voice Systems Inc
- DSS Corp
- Focus Communications
- Gibraltar On Hold Messaging
- Gibraltar On Hold Messaging
- Green Fork LTD
- House Calls
- J 2 Telecom
- Microvoice Applications Inc
- Nationwide Recording Svc Inc
- Optimum Telecom Solutions
- Payphone Investments Inc
- Phonetel
- RRP Telecommunications
- Speakeasy Systems
- Tadiran Telecom Inc
- Tech Express
- Teleco
- Telecom Networking
- Vatacomm
- Versicom Corp
- Voice Mail Warehouse