key to select the DTMF in the type field.
4. Enter the value with the Desired DTMF number
or Save soft key to save the configuration
To configure the DTMF via Web interface
1. Click Function keys → Line or Memory key.
2. Select the desired Line or Memory key and select DTMF in the Type.
3. Fill the value with the Desired DTMF number.
4. Click the to save the configuration.
Prefix
If the key is configured as Prefix key, you can set the number prefix (e.g. Before the number plus
9), then you don't input 9, press the key and 9 will display on the LCD interface.
To configure the Prefix via Phone Interface
1. Press Menu → Features → Function Keys → Line or Memory keys as Function Keys →
2. Select the wanted Line or Memory key.