| Business | Phone |
| Automated Communications San Diego 92154 | (619) 429-1602 |
| B & C Telephones 1135 Garnet Ave # E, San Diego 92109 | (619) 222-3334 |
| Chaos Telecom Inc 4060 Sorrento Valley Blvd, San Diego 92121 | (858) 535-9605 |
| David J Cowhig Excel Rep San Diego 92110 | (619) 276-1707 |
| Delta Groups Engineering Inc 8515 Arjons Dr # G, San Diego 92126 | (858) 689-4777 |
| Excellence Operator Intl 8385 Miramar Mall, San Diego 92121 | (858) 678-0404 |
| San Diego Sports Comms 9449 Friars Rd, San Diego 92108 | (619) 281-1500 |
| Siemens Business Comm Systems 16745 W Bernardo Dr # 400, San Diego 92127 | (858) 521-3100 |
| Sim J Harris Communications 9233 Harris Plant Rd, San Diego 92145 | (858) 277-0898 |
| Satcom Inc 6920 Miramar Rd, San Diego 92121 | (858) 860-1113 |
| Qualphone Inc 16885 W Bernardo Dr # 122, San Diego 92127 | (858) 451-0100 |
| Prism Technologies San Diego 92128 | (858) 385-0001 |
| Profitline 9920 Pacific Heights Blvd #200, San Diego 92121 | (858) 452-6800 |
| Dialtronix Corp 7675 Dagget St, San Diego 92111 | (858) 569-4444 |
| Gsc Telecom 3838 Chamoune Ave, San Diego 92105 | (619) 280-7472 |
| Zte San Diego 10105 Pacific Heights Blvd, San Diego 92121 | (858) 554-0387 |
| Togabi Technologies 6815 Flanders Dr, San Diego 92121 | (858) 453-6999 |