- Advanced Telephone Systems Inc
- Advanced Telephone Systems Inc
- Allegiance Telecom
- Allegiance Telecom
- Alternative Telecom & Energy
- Alternative Telecom & Energy
- Birch Telecom
- Birch Telecom
- Birch Telecom
- Birch Telecom
- Broadwing Communications
- Brumfield Communication Svc
- Brumfield Communication Svc
- Comtek
- Comtek
- Crosscom National
- Crosscom National
- FONC
- FONC
- Lucent Technologies
- Lucent Technologies
- Mca Communications Co
- Mca Communications Co
- Norvergence Inc
- Norvergence Inc
