Motorola MOTOTRBO SYSTEM PLANNER Specifications download pdf (Page 195)

186 System Design Considerations

November, 2008

2. In the “RX Group Lists” folder, add a new group list, and then add the Group Call you just

created to be a member of the list. The group list controls which groups a radio will hear

when tuned to a selected channel. For example, if members of the Maintenance group

should also be able to listen to other groups on the channel, those other groups would be

added to the RX Group List; if members of the Maintenance group should only hear traffic

related to their own group, then only the Maintenance group would be added to the group

list. The group list should again be renamed to something intuitive; in step 3 below you will

assign this group list, by name, to the RX Group List attribute of a channel.

3. In the channels menu, each “zone” can contain up to 16 channels that can be mapped to

the 16-position top selector knob of the portable radio or the relative channel number

selections on a mobile. Radio users that require more than 16 channels must organize

them into multiple folders in CPS, so that they can be accessed as “zones” in the radio

menu. Zones, if used, can and should also be given names. In an appropriate folder,

create a new digital channel. To fully define the channel, you must assign the appropriate

receive and transmit frequencies, and also select the TDMA slot number. Then, add the

group list you defined in step 2 above to the RX Group List attribute, followed by adding

the digital group call to the TX Contact Name attribute. You will also need to define the TX

Admit Criteria. Rename the channel to something intuitive, and assign it to a knob

position; the channel name will be displayed on the radio whenever it is selected via the

top knob on a portable or the up/down channel selection buttons on a mobile.

If configured as described above, radio users are able to place a group call simply by selecting the

defined channel and pressing PTT. Groups can also be selected from the Contacts menu on

display radios, as enabled by step one of the above. It is also possible to assign a group call to a

radio programmable button (called a “one touch call” in CPS) so that users can place a group call

at the touch of a button.

4.8.4 Assigning IDs and Aliases

Each radio, group, and control station in the system must have a unique ID number and alias.

There should be no duplicate IDs on the system.

4.8.4.1 Identifying Radio IDs

Radio IDs for a MOTOTRBO system range between 1 and 16776415. There are two approaches

to identifying radio IDs:

Option A:

As a general practice, create contiguous ID ranges, but allow room for future expansion. As an

example, a department has a current requirement for 1200 IDs. However, the department may

need up to 2000 IDs in 12 months. Assigning the IDs during planning saves future re-programming

of radios and subscriber records.

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Motorola MOTOTRBO SYSTEM PLANNER Specifications Page 195