|  | Single Channel or Up to 12-Channel Unit |
| | Monitors the 4-Wire Network or 4-Wire Equipment without Disconnecting the Circuit |
| | Transmits to the 4-Wire Network or 4-Wire Equipment without Disconnecting the Circuit |
| | Front Panel Status Features |
| | Flexible Equipment Monitoring Configuration |
| | Used for Remote Troubleshooting of Hoot Circuits |
| | Secure Access Authentication Code for Circuit Access |