Use caution on purchasing the EndPoint Module License if you do not plan to use it right away or find that you do not want to use it after purchasing. Sangoma will require you, if you want current updates, to have continuous support coverage from the date of purchase of the license, so you may have to make back payments for the period when you were not using it.
Bottom line, don’t buy the license until you want to use it and are willing to maintain annual support payments.