There are several important aspects of a DSP. Understanding and managing these key aspects can help determine how effective the DSP will be in achieving business goals. Demanding flexibility and open standards from the DSP will allow interaction with the myriad applications and features that are available from a variety of sources, as well as utilizing the network infrastructure to its potential.
For more information on choosing a DSP vendor see the STAR DIG, Chapter 8.
Here are links to several of the DSP vendors for cars and light trucks.
Here are links to several of the DSP vendors for medium and heavy-duty trucks.