Audiovox GSM 900 system, User Manual

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After you key in the telephone number, long press key for a second, then
”P” will display on the LCD screen. Enter the extension number and press
key to make the call.
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.12 Call Options
When you are on a telephone call, you can press key to enter the options
and press key to select. The options are listed as follows:
The options marked “*” are only available if you have subscribed
to your network service provider.
Mute call
When no sound wants to be heard by your interlocutor when you are on a call.
You can choose the Mute function to do so.
* End call
Under a circumstance of multi-party call, you can end up one of them by
selecting this function.
* Swap call
This function is available when you have both active calls and calls on hold.
Swap transfers the active call to hold and vice versa, so that you may converse
with the other party.
* Hold call
This function allows you to put a currently active call on hold, so that you can
initiate a new call.