Telephony
| Avaya Partner Chicago - Business Telephone Systems We are an Avaya business telephone systems and telecommunications technology partner, providing Avaya phones and communication systems for your company's communication solutions. | |
| Datavoice Corporation | |
| Delta Three Internet Telephony | |
| Dictaphone Corporation | |
| Inter-Tel | |
| M5 Networks M5 is the leading Voice-as-a-Service company. Hundreds of businesses have thrown out their phone companies and phone systems and switched to M5. | |
| Natural MicroSystems | |
| Netcall Technologies Ltd | |
| net2phone il sistema piu' economico per telefonare all'estero | |
| Vbuzzer Internet Telephony Provider of free and premium peer-to-peer Internet telephony software. | |
| Wheat International Communications | |
| Worldwide Communications, Inc. | |