C o n n e c t i v i t y1052. When the connection has been established, to talk to the otherparticipant, press and hold the PTT key while you talk.3. To end the PTT call, select Disconnect, or if there are several PTT calls,select Options > Disconnect.Answer a PTT callIf Accepted list calls is set to Notify in User settings, a short tone notifiesyou of an incoming call. To accept the call, select Accept. To silence thetone, select Silence. To reject the call, press the end key.Make a PTT group callTo call a group, select Options > Contacts, select Options > Talk tomany, mark the contacts you want to call, and press the PTT key.Callback requestsSend a callback requestIf you make a one-to-one call and do not get a response, you can send arequest for the person to call you back.To send a callback request from Contacts, scroll to a contact, and selectOptions > Send callback request.Respond to a callback requestWhen someone sends you a callback request, 1 new callback request isdisplayed in the standby mode. Select Show to open Callback inbox.Scroll to a contact, and press the PTT key.ChannelsWhen you are connected to a channel, all members joined to thechannel hear you talking. Up to five channels can be active at the sametime. When more than one channel is active, select Swap to change thechannel you want to talk to.Channels are registered with a URL address. One user registers thechannel URL in the network by joining the channel the first time.