HI
To be in the Hr field you really have to possess a liking for the same.
i would suggest that you have a face to face interaction with ur HR manager in the call centre and try to figure out what actually thay look for.
what goes in favour of you is that u have a hands on experience in the Call centre and you are in a better position to appreciate the working environment, conditions, recruitment trends, attrition rates.....
Hoewever if you are looking for some other sectors than the chances are bright that you may land up in a consultancy.
it all depends upon ur liking and future plans
so give it a deep thought and best of luck
KUMAR ABHIJITT :D