| Business | Phone |
| Deltacom International 2004 Kinvara Dr, Pittsburgh 15237 | (412) 367-8968 |
| Nec Business Network Solutions 7805 Mcknight Rd, Pittsburgh 15237 | (412) 635-7960 |
| Nortel Networks 5001 Centre Ave, Pittsburgh 15213 | (412) 809-7300 |
| Penn Telecom Inc 322 4th Ave, Pittsburgh 15222 | (412) 325-1225 |