P25 (Phase-1) Direct Mode Solution;
The direct mode of operation is offered as an encrypted and / or non-encrypted solution for scenarios whereby:
-Users require a limited area of usage (small coverage area)
-The central management needs to communicate over a single base station (in contrast to multiple base stations of a wide area system)
-Voice communication is the priority, and data communication is not required
-There is no obligation to use Time-Division Multiple Access (TDMA) because the number of user groups is not large and there is no problem with frequency allocation
-Communication is mainly required in rural and/or mountainous areas.
If the communication requirements of users change and they need a more advanced solution, the system can be converted into a wide area mode system (either conventional or trunking) by the means of:
-Adding base stations
-Establishing a system management center
-Connecting installed base stations to each other and to the switching unit in the system management center
-Programming of the radios according to the new architecture
