Grandstream Networks WP820 User Manual page 59

Using the PTT Functionality on the WP820
To send a PTT broadcast from your WP820:
1. Unlock your WP820.
2. Make sure the multi-function button is configured to be a Push-To-Talk button.
3. Press the Push to Talk soft key.
4. Press and hold the Push to Talk key while speaking.
Notes:
Users could press and hold the Push-to-talk key from any screen to quickly initiate PTT call using default channel.
The channel status will change to Sending PTT to indicate that you are transmitting as displayed on the following
screenshot.
The devices which are in the same channel will receive the PTT call.
Figure 84: Enabling PTT Feature on WP820
Figure 85: PPT Channel
Figure 86: PTT Call (Caller)