SmarTrunk II enabled products conform to all the following special feature sets as described for various call types.

Sequence of Events:
 

1. Mobile subscriber presses the PTT (Push To Talk) button to initiate a group call to the subscriber's own group. Alternatively, mobile subscriber enters desired group number followed by routing code "3*" on the radio keypad.

2. Mobile radio searches for an idle channel and signals the controller.

3. Base station controller acknowledges the mobile and signals all subscriber radios that are a part of the called group.

4. Subscriber radios assigned to the called group open squelch, connection is established, and a group conversation begins.

5. Any subscriber in the group presses the "#" key to terminate the call, (this may be inhibited by programming to prevent accidental clear down of a group call), or repeater disconnects at the expiration of the Group Activity Timer.

Special Features:

• Automatic PTT (Push To Talk) Mode - subscribers may initiate group calls to their own subscriber group by pressing the PTT button.

• Call Limit Timer - programmable call limit timer on a per user (group) basis.

• Group Activity Timer - acts like a "hang timer" to retain channel for the duration of a call.

• Multiple PTT Group can be selected without keypad in some radios

• Memory Speed Dial - convenient, cellular like, dialing including a re-dial function.

• Clear Channel Alert - notifies the subscriber when a channel becomes available after the subscriber has attempted to access the system when all channels are busy.

• Radio Kill - eliminates unauthorized users of the system.

• Conventional Mode Operation - "talk around" communications available in certain subscriber radios.

Sequence of Events:

1. Mobile subscriber enters desired subscriber number followed by routing code "3*" on the radio keypad.

2. Mobile radio searches for an idle channel and signals an available controller.

3. Base station controller acknowledges incoming call and signals desired subscriber radio, which responds by ringing.

4. Called subscriber answers call by pressing the "*" key, establishing the connection.

5. Either subscriber presses the "#" key to terminate the call.

Special Features:

• Call Limit Timer - programmable call limit timer on a per user basis.

• Channel Privacy - other users cannot interfere with or eavesdrop on calls.

• Memory Speed Dial - convenient, cellular like, dialing including a re-dial function.

• Clear Channel Alert - notifies the subscriber when a channel becomes available after the subscriber has attempted to access the system when all channels are busy.

• Radio Kill - eliminates unauthorized users of the system.

• Conventional Mode Operation - "talk around" communications available in certain subscriber radios.

Sequence of Events:

1. Mobile subscriber enters "9*" on the radio keypad.

2. Mobile radio searches for an idle channel and signals the controller.

3. Base station controller acknowledges incoming call and signals the established mobile operator radio, which responds by ringing.

4. When the called party answers, the conversation begins.

5. Mobile subscriber presses the "#" key on the radio keypad to terminate the call.

Special Features:

• Two touch dialing to access the subscriber radio that has been programmed as the mobile operator.

• Programmable emergency call override status.