Grandstream Networks WP820 User Manual page 58

Speed dial
The multi-function key can be used to speed dial a contact. Note: The speed dial function will need to be setup before
activating the feature.
Disable
This function of Multi-function button allows the user to disable the multi-function button completely.
PTT (PUSH-TO-TALK) FUNCTIONALITY
The WP820 supports the Push to talk (PTT) features which is a technology based on the instantaneous communication
commonly employed in wireless cellular phone services using a button to switch the device from voice transmission mode to
voice reception mode. This feature is similar to "walkie talkie" use and the PTT mode switches a phone from full duplex mode,
where both parties can hear each other simultaneously, to half duplex mode, where only one party can speak at one time.
Multiple parties to the conversation may also be included.
Enabling PTT mode on the WP820
You can enable and configure the PTT settings using the WP820 LCD menu:
1. Press Menu to bring up operation menu.
2. Use arrow keys to reach Settings �� Advanced settings �� PTT and paging.
3. Choose PTT settings and enable the PTT function.
4. Press Save button to enable PTT mode.
Figure 83: Disable Multi-
function button