User's Manual

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customize the function.
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5
Line key
Default to line 1/ line 2, support the custom configuration of DSS
key.
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6
Volume Up/DownKey
In the standby state of ringing and the ringing configuration
interface, press this button to increase/reduce the ring volume;
Press this button to increase/lower the volume on the call or volume
adjustment screen.
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7
Mute Key
During a call, the user can press this key to mute the microphone.
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8
Standard Telephone
Keys
The 12 standard telephone keys provide the same function as
standard telephones, but further to the standard function, some keys
also provide special function by long-pressing the key,
Key # - Long-pressed to lock the phone.
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9
Headset Key
Users can press this key to open the headset channel
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10
Redial
Press the Redial key to redial the last number dialed
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11
Hands-free Key
The user can press this key to open the speakerphone.
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12
Side Key
Long press the side key to enter the settings interface and set the
required functions.
7.2 Using Handset / Hands-free Speaker / Headphone

Using Handset
To talk over handset, user should lift the handset off the device and dial the number, or dial the number first,
then lift the handset and the number will be dialed. User can switch audio channel to handset by lifting the
handset when audio channel is turned on in speaker or headphone.

Using Hands-free Speaker
To talk over hands-free speaker, user should press the hands-free button then dial the number, or dial the
number first then press the hands-free button. User can switch audio channel to the speaker from handset by
pressing the hands-free button when audio channel is opened in handset.

Using Headphone
To use headphone, by default, user should headset button which is defined by DSS key to turn on the
headphone. Same as handset and hands-free speaker, user can dial the number before or after the
headphone is turned on.

Using Line Keys(Defined by DSS Key)
User can use line key to make or answer a call on specific line. If handset has been lifted, the audio channel