atm vsThis page compares ATM and TDM and mentions the difference between ATM and TDM. As we know, ATM stands for Asynchronous Transfer Mode, and TDM stands for Time DivisionThe difference between ATM and GTM – 200kg in this case – is the amount being supported by the jockey wheel or towbar of the tow vehicle, otherwise known as ball weht. Therefore, payload capacity of a trailer is