[Off Topic] Cloud Arduino Own Mqtt Broker

Hi, i discovered than Arduino has a own mqtt broker, mqtt.arduino.cc, to test purposes.
I got my username and password, but the port 8883 is only ssl. There is any port not ssl? (the port 1883 dont work).

Thanks and sorry by off topic, i dont know which topic it fit.

MQTT is a machine-to-machine (M2M)/"Internet of Things" connectivity protocol. It was designed as an extremely lightweight publish/subscribe messaging transport. It is useful for connections with remote locations where a small code footprint is required and/or network bandwidth is at a premium. For example, it has been used in sensors communicating to a broker via satellite link, over occasional dial-up connections with healthcare providers, and in a range of home automation and small device scenarios. It is also ideal for mobile applications because of its small size, low power usage, minimised data packets, and efficient distribution of information to one or many receivers (more...)