The Internet and email
There is Internet (and thus, email) access at Shain Library and computer labs. If you have your own computer, you will also have wireless access and be able to get online from your room or everywhere on campus.
There is a post office on campus at the College center (Cro). It is open during office hours and offers a variety of services. Your post office box is located within the Post Office, and you will have that box for your entire four years at Connecticut College.
Depending on where you need to call, many international numbers are much cheaper to reach using prepaid phone cards. Phone cards can be purchased at the College Bookshop on campus or at gas stations nearby.
Some good places to get phone cards are the gas stations in Hodges Square, which are in walking distance from campus. Consider connection fees, your calling needs and the duration of your average call when choosing a phone card. You can also buy cards online at sites like http://www.uniontelecard.com, but remember that many of your fellow international student friends may have specific cards or websites to recommend for calling your home region at great rates. Local calls with the area code 860 are free from your room phones.
Skype or WhatsApp are the best alternatives you might want to look into.