Depending on the line you work, you will be as a manager 20%-40% below market salary for your job. If you bring it up, then suddenly you are not a team player.
When I placed my resignation I was questioned about it as if they were doing me a favor for letting me work there. As a call center manager you get anywhere else at least 15,000 more per year.
Phone agents however, are above market rate. They start them at 16 per hour, which means you only make 3,000 more per year than your agents. Yet you are responsible for their performance, plus the normal reporting, etc.
Lots of free perks, like sodas and snacks