Calling
Push-to-Talk Group Call
4) Enter the number (maximum 24 digits) to divert to.
5) To save changes, press OK or press Back > Yes
Disable the Diversion
To disable the diversion, at step 3 described in Divert All Calls on page 27, select All calls
and unmark the check box. Press Back to apply changes. The handset sends a diversion reason
code to the system when establishing a call. The call is automatically disconnected after a few
seconds.
Push-to-Talk Group Call
NOTICE: Applicable to WL4 Plus only.
Push-to-talk (PTT) provides instant voice connectivity to a group of persons. PTT is a one-way
(half-duplex) communication. To talk, press and hold the Mute/PTT button
14
. Release the button
to let another person to talk.
To participate in the conference, the group members must accept an invitation received as a text
message. For the details, refer to the Accept a PTT Invitation on page 28.
If a member declines an invitation, they can re-join the group/conference later on. For the details,
refer to the Re-join a PTT Call Session on page 29.
Every PTT group must be defined in the WinPDM/WSG DM to be able to use this function. For
the details, refer to the Configuration Manual, Unify OpenScape WLAN Phone WL4.
INFO: If it is required to have key lock during an ongoing call, for example to
avoid that any key is accidentally pressed, set the Automatic key lock to On.
For the details, refer to the Automatic Keypad Lock Settings on page 52.
Accept a PTT Invitation
A PTT invitation is viewed the same way as an ordinary message. The message can contain up
to 500 characters.
1) Press Call to accept the invitation and join the call. Refer to Figure 4: PTT invitation window
on page 29.
NOTICE: The handset may accept the invitation automatically, start in invert-
ed mute and loudspeaking mode, depending on the configuration of the re-
ceived invitation.
2) The handset is connected to the PTT session. The invitation can now be deleted or closed by
pressing Delete or Close, respectively. The call is not disconnected by pressing these soft
keys.
3) Press and hold the Mute/PTT button to start talking. Release the button to let another person
to talk.
14
Depends on configuration.
A31003-M2000-U109-01-7619, 29/04/2020
28 OpenScape WLAN Phone WL4, User Manual
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