All you need is a phone line! All phone lines have a constant flow of voltage, around 40-70 volts (up to 100 volts when it rings!), but you can't just plug stuff into it and expect it to work. You can really mess with your phone system by doing that.
Salary Between $45,000 and $50,000. The average annual salary of a developmental specialist assistant was $47,000 as of 2014, according to the job site Simply Hired.hile developmental specialist assistants earned $47,000 in 2014, Simply Hired reported average salaries of $51,000 for developmental specialists. Simply Hired's survey sample could include more level III developmental specialist assistants, which would account for the small difference in salaries.
The average salary for an Intervention Specialist is $37,785 per year. Most people with this job move on to other positions after 20 years in this career.Experience has a moderate effect on pay for this job.ost intervention specialist positions occur during regular school hours during the school year, with a three month paid summer break, depending on district policies. However, preparatory work and grading are required outside of school hours.