Push to Talk Mobile IP Touch Only | Alcatel IPTOUCH 300 guide

Push to Talk (Mobile IP Touch

600 only)

The Push-to-talk feature allows the Mobile IPTouch 600 to operate in a push-to-talk (PTT) group broadcast mode in addition to the standard telephone operation.

The Mobile IPTouch 600 telephone supports 8 multicast channels. The channel used is saved in the telephone memory. A PTT call is initiated by pressing the Talk button located on the right side of the handset. All Mobile IPTouch 600 monitoring that channel and that have enabled the PTT feature in the user preferences menu will hear the transmission through group listening.

PTT dialogue is interrupted when you answer a PBX call. When the PBX call is ended, PTT dialogue resumes if in an active call.

6.1	Selecting a channel

FCN	Push to talk	OK	Select channel	OK

6.2	Initiating a call

The call period. The two-way radio operates on the concept of a push-to-talk session or call period. The push-to-talk call period begins with the first transmission and ends when there has been no traffic on the channel for 10 seconds. The keypad cannot be used for any other function. However, it is possible to place a PBX call.

the 'start transmit' sound indicates that you can start talking

press the 'talk' button

talk with the		the mobile iptouch 600 then
		enters the waiting state
handset 2 inches (5
		where it monitors the
cm) away
		channel for up to 10 seconds

release the 'talk'

button

6.3	Receiving a call

Upon receiving a PTT transmission, the phone plays the receiving alert sound and enters the receive state. In this state the phone receives all conversations on the selected channel. The phone will ignore the Talk key while in the receive state. The screen shows the current active channel, the caller ID information of the current transmitter, and an indication that the phone is receiving a broadcast transmission. During a PBX conversation, the MIPT 600 is not able to receive a PTT transmission. At the end of a transmission, the phone enters the waiting state where it monitors the channel for up to 10 seconds and displays Waiting on the screen. If no other transmission occurs within 10 seconds the phone plays the end call sound and reverts to idle state.

6.4	Change PTT volume

Use the Up and Down buttons to raise or lower PTT volume. A separate volume is maintained for PTT calls with the current volume selection retained in memory.

6.5	Muting a PTT call

To mute a current call, the receiver can press the Mute soft key. This brings up a Mute prompt. Press the Yes or No soft key. The prompt disappears after 3 seconds if the user doesnt confirm either Yes or No. Mute only affects the current call and the phone will play subsequent PTT calls. Mute does not allow the user to use the wireless telephones keypad for anything else, including an OAI application. The Mute soft key turns into an Unmute soft key while in the mute state and can be used to unmute the PTT call (the confirmation prompt is displayed first). When the next PTT call period starts the audio is automatically unmuted.

6.6	Incoming PBX call during a PTT call

A telephone call may be answered while in a PTT call session. To announce an incoming call, the Wireless Telephone will ring with a low-volume ring and display the caller ID. To answer the call, press Power On / Start Call. The PTT call session will be pre-empted and no PTT audio will be heard. After the PBX call is over, press Power Off / End Call as usual to go back on-hook. The PTT call goes out of pre-empted mode and becomes active again. If an already active PTT call has not ended, the PTT audio starts playing again. If the user does not answer the telephone call by pressing Power On / Start Call, the PTT display will be shown after the ring has stopped.

6.7	Incoming PBX call during a PTT call

6.8	Making a PBX call during a PTT call

To start a telephone call during a PTT call session, press the Power On / Start Call key. This causes the two-way radio to be pre- empted as described above.