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.
Average Child Welfare Specialist Salaries. The average salary for child welfare specialist jobs is $47,000. Average child welfare specialist salaries can vary greatly due to company, location, industry, experience and benefits.