def parse_user(user)
      user.slice! 0, 4 if user =~ /sip:/
      user = user.split(":")[0]
      user, domain = user.split("@")
      domain ||= "[remote_ip]"
      [user, domain]
    end
def parse_user(user)
      user.slice! 0, 4 if user =~ /sip:/
      user = user.split(":")[0]
      user, domain = user.split("@")
      domain ||= "[remote_ip]"
      [user, domain]
    end
TODO: SIPS support?