Direct Mode Operation; Group Call; Figure 2: Trunked Mode Operation; Figure 3: Direct Mode Operation - Motorola TCR1000 Product Information Manual

Figure 2: Trunked Mode Operation

Direct Mode Operation

Direct Mode Operation is a mode of simplex operation where radios communicate directly.

Figure 3: Direct Mode Operation

Group Call

The group call service enables the radio to communicate with a group of other TETRA radios using point to multi-
point operation. This service is available in both TMO and DMO. You can initiate a new group call to the selected
talkgroup or talk back to the existing group call by pressing the PTT button.
Note: Before the radio can be used for making group calls, the RCU must be initialized. You initiate the
RCU by pressing one of its buttons (other than the PTT), or by rotating the rotary switch to another
position.
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