Spirent Communications:
| Model | Date | Group | Description |
|---|---|---|---|
| TAS 240 | 2001 | Other | Voiceband Subscriber Loop Emulator |
| TAS 450 | 2002 | Other | RF Channel Emulator |
| TAS 4600A | 2001 | Other | Noise & Interference Emulator |
| TAS Series II | 2001 | Other | Telephone Network Emulator |
| TAS Series II Digital | December 2000 | Other |
