| Business | Phone |
| Victor Boehm & Co Technical 2549 Trevor Pl, Cincinnati 45225 | (513) 471-1930 |
| Cbs Technologies 6900 Steger Dr, Cincinnati 45237 | (513) 361-9600 |
| Consolidated Telecom Svc 24 Compton Rd # 212, Cincinnati 45216 | (513) 761-6166 |
| Gabriel Solutions 3764 Mount Vernon Ave, Cincinnati 45209 | (513) 351-5400 |
| Ipc Information Systems Inc 895 Central Ave, Cincinnati 45202 | (513) 241-9100 |
| Key Telecommunications 407 Vine St # 129, Cincinnati 45202 | (513) 381-5113 |
| M & M Payphones 8949 Wuest Rd, Cincinnati 45251 | (513) 623-5164 |
| P A Commercial Telephone Inc 1430 Karahill Dr, Cincinnati 45240 | (513) 825-3195 |
| Parallel Technologies Inc 11111 Kenwood Rd, Cincinnati 45242 | (513) 769-8777 |
| Pinnacle Communications Corp 8250 Winton Rd, Cincinnati 45231 | (513) 931-7160 |
| Power & Telephone Supply Co 4650 Lake Forest Dr # 350, Cincinnati 45242 | (513) 769-4490 |
| Professional Telecommunication 2119 Beechmont Ave, Cincinnati 45230 | (513) 232-7700 |
| Sysborne Enterprise Comms 8800 Governors Hill Dr, Cincinnati 45249 | (513) 554-8000 |
| Tel-Data Communications Inc 8980 Blue Ash Rd, Cincinnati 45242 | (513) 984-0749 |
| Teleco Cincinnati 611 Shepherd Dr, Cincinnati 45215 | (513) 769-8383 |