All I heard about call centers is: If you need longer than 30 seconds to close a call you really need a good reason. And it will be marked negatively in your report.
You should be able to handle thousands of calls as fast as possible, so they can only pay a few people in order to handle people calling.
This. I worked in a call centre for a while. Service was not the priority, speed was. I got in trouble for staying on the line to actually resolve a customer’s issue because it took a long time (basically ended up having to do a conference call with the third party who had fucked up). I left that job ASAP because fuck that.