This could range form anything between Computer hardware and Software, she could be cold calling or provided with a database of clients/customers to contact about existing products. Most IT Sales jobs are commission based, so she would be on an average basic annual salary, and earn commission on any successful sales.
She would need to have a rough IT background, depends what the job specifies really, but if she goes for interviews she can ask about basic salaries, the % of commission she would earn etc. This could be a good money earner if she is good at Sales !!
Hope that helps ?