| Command | Description |
|---|---|
| @ | Send back # sign. (Used for establishing device communication). |
| V | Send firmware Version number, date & time, toggle settings, line numbers. |
| v | Send internal jumper settings (determining the Caller ID type captured and On/Off-Hook scheme used) |
| J | List all phone numbers in memory. (Used for internal blocking/passing). |
| Q | Delete all phone numbers in memory. |
| R | Reset system. Toggles set to upper case default values. |
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