| Business | Phone |
| Quality Telephone Svc 2421 E Rosemonte Dr, Phoenix 85050 | (623) 580-0066 |
| Center Communications 3009 W Clarendon Ave, Phoenix 85017 | (602) 242-5515 |
| Power Communications Inc 2821 S 35th St # 1, Phoenix 85034 | (602) 437-1197 |
| Dms Communications Inc 35640 N 11th Ave, Phoenix 85086 | (623) 582-3001 |
| Future Voice Systems 2112 W Monte Vista Rd, Phoenix 85009 | (602) 258-4455 |
| K C Phone Systems Inc 3325 W Kings Ave, Phoenix 85053 | (602) 548-1000 |