| In order to have Message Waiting, you must disable voice mail. |
| Option | Description |
|---|---|
| 0 | None. [Default] when no voice mail is installed. |
| 1 | Built-In Automated Attendant. |
| 2 | IntraMail. [Default] when IntraMail is installed. |
| 3 | UltraMail (DSX-80/160 only). [Default] when UltraMail is installed. |
| 4 | External. |
| Use this option to enable special dial tone for a single line telephone. |
| When enabled, the single line telephone user will hear special dial tone when they have a message waiting |
| Option | Description |
|---|---|
| No (0) | [Default] Disabled. |
| Yes (1) | Enabled. |
| (DSX-80/160 only) If the single line extension has a high voltage Message Waiting lamp, use this option to enable high voltage Message Waiting for the extension. |
| If both high voltage and FSK Message Waiting are enabled, the system uses FSK. |
| Option | Description |
|---|---|
| No (0) | [Default] Disabled. |
| Yes (1) | Enabled. |
| Use this option to enable FSK Message Waiting for the single line extension. |
| If both high voltage and FSK Message Waiting are enabled, the system uses FSK. |
| Option | Description |
|---|---|
| No (0) | [Default] Disabled. |
| Yes (1) | Enabled. |
| Assign Class of Service to extensions. |
| Option | Description |
|---|---|
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