# Category 3: Logout Feature Bits

These feature bits control exiting a mailbox. If users can log in, they automatically can log out, either by pressing X, by hanging up, or by not responding to repeated system prompts.

Bit | Description | Required | Incompatible
--- | --- | --- | ---
003 | Return to welcome prompt |  |
009 | Automatic Logout if no messages/receipts | 052 or 089 |
170 | *Transfer to Email System | 004, 005, 176 |
220 | No dial extension or Email if unplayed messages | 170 |
283 | Say number of unplayed messages on last logout |  |