| Business | Phone |
| Avaya Inc 2631 Erie Ave, Cincinnati 45208 | (513) 794-9056 |
| Verizon Communications 12191 Princeton Pike, Cincinnati 45246 | (513) 671-2200 |
| Busi-Comm Group 3021 Robertson Ave, Cincinnati 45209 | (513) 531-6100 |
| Cincinnati Bell Telephone Co 5524 Cleves Warsaw Pike, Cincinnati 45238 | (513) 397-9900 |
| Classic Telecom Intl 933 Lincoln Ave, Cincinnati 45206 | (513) 751-0470 |
| Comm Line Inc 3223 Harrison Ave, Cincinnati 45211 | (513) 662-6701 |
| Cts Construction Inc 6661 Corporate Dr, Cincinnati 45242 | (513) 489-8290 |
| Fishel Technologies 4740 Interstate Dr # R, Cincinnati 45246 | (513) 956-5210 |
| Fujitsu Network Communications 250 E 5th St # 1500, Cincinnati 45202 | (513) 762-7616 |
| Home Confinement Svc 8038 Winton Rd, Cincinnati 45224 | (513) 728-3500 |
| Mas Tec 6831 Ashfield Dr, Cincinnati 45242 | (513) 936-8903 |
| Midwest Technologies Cnslnt 1968 Springer Ave, Cincinnati 45208 | (513) 321-4900 |
| On Hold Mktng & Communications 7672 Montgomery Rd, Cincinnati 45236 | (513) 631-4653 |
| Open Line Communications 3731 Eastern Hills Ln, Cincinnati 45209 | (513) 458-6500 |
| Schooley Mitchell 3181 Linwood Ave # 22, Cincinnati 45208 | (513) 519-1050 |
| Sienna Communications Group 5643 Cheviot Rd, Cincinnati 45247 | (513) 923-9003 |
| Telecom Products Corp Cincinnati 45202 | (513) 684-9300 |