No disrespect to you or your abilities, but did you say you've;
A) Never done this type of work
B) Hired to run the department!?
Dear Gawd, that explains a lot, as I've been on the phone/e-mail with said groups a time or two in the past.
OK, having said that, congratulations on your new job!
Now speaking from personal experience;
1) Make sure EVERYONE you have on the phones, has very clear and well spoken English.
2) Make sure there is zero back ground noise, the last thing I want to hear is people goofing off in the background or like I'm talking to someone at the call center of the Jerry Lewis Telethon.
3) Make your people learn and understand what they are saying, you can tell when someone is reading off of cue cards or through a flow-chart.