Need a little more info than what you gave.
When you installed your wireless, did you name it? For example mine is my last name.
Also, is your Internet secure? Did you set up a password to access your Internet?
You have access to your wireless, other wise you wouldn't have posted. All you need to do is put in the email of the person's iTunes account you want to face time with then just call. Or if youre calling an iPhone put in their number but they need to have access to have wifi as well.
I hope this helps.
Sent from my iPad using iPF