OTAP doesn't require a repeater as long as you use a Control Station.

[Q] I would like to schedule radios with Radio Management via OTAP. I use the method to one PC (in other words I installed the server; the RM customer; the programming device and the Job Processor on the same PC). I have a control station directly connected to the PC.

My question: is it possible to program the radios without going through the repeater? (In other words, the OTAP data goes directly from the control station to the radio to program).

And if it is not possible I suppose then that the path of OTAP data is as follows: PC - Control Station - repeater - RADIO to program. In this case is the Nai Data license to be install for the repeater ?

[A] You can OTAP radios via a control station without a repeater by simply using a simplex channel. The limitation here is RF range since the control station will presumably have a lower gain antenna and will be located somewhere that does not have as much coverage as a repeater would. 

Remember that in order for OTAP to work, there needs to be signal both ways (i.e. the control station must be able to hear the target radios) since a lot of ack messages are used to ensure the write job goes through without error.

You can also do OTAP via a control station and repeater.

The NAI Data Licence is only needed if you intend using the repeater(s) as the source/destination for data (i.e. no control station and using MNIS).

All of this is covered in the MOTOTRBO Radio Management Guide for Technical Staff I published a few weeks ago.

What is a Control Station? Click here to find out and how to set up one.