SMS monthly quota for a client account
You can define how much credit (ie: text-messages, phone calls) should be automatically added to a customer's credit on a monthly basis.
Month-to-month cumulation (eg: $30 added every 14 of the month, if the customer's account was created on November, 12th) ;
Monthly recharge (eg: text-messaging credit restored at $30 every 14 of the month).
This monthly quota can be modified through the customer's account page in your reseller console: