It can be very stressful, to say the least, to work in a call center as an agent. It can be much more so if you're the manager. As manager, you're the one who has to deal with matters your agents can't handle for whatever reason, be it a particularly unpleasant caller or an issue with the call center agents themselves. It's your job to not only make sure everyone is doing their jobs to their best ability, but to see that your call center is a pleasant work environment all around.