docs: def _init(self):
          """Initialize the telnet connection
          """
          self.tn = telnetlib.Telnet(self.ip, self.port)
          self.tn.read_until('User Name')
          self.tn.write('apc\r\n')
          self.tn.read_until('Password')
          self.tn.write('apc\r\n')
          self.until_done()