Balance and Credit

Description

There are two fields which describes money situation for user: balance and credit.

• Balance is the amount of money you owe user.
• Credit – how much money you allow user to be in debt before you.

These fields act and have slightly different meaning for different types of users: postpaid and prepaid:

Postpaid users

Balance – can be any value:

• < 0 – means user owns you money for your services, he will get invoice at the end of the month and when he pays for that invoice and his balance will increase
• > 0 – user has overpaid you (you owe to user)
• == 0 – nobody owes nothing to anybody (this is usual when user is new or just paid his invoice and did not made a call or used other services)

Credit for postpaid user can be:

• > 0 – that means user can make calls and use other services until he reaches credit. E.g. if his credit = 10 USD, he can make calls (and use other services) for total amount of 10 USD. At that time his balance will start at 0 and go down to -10 USD. When balance reaches -10 USD user will not be able to make any more calls.
• == ∞ - user can make unlimited calls and use any services without any restrictions. All amounts will be included into invoice.

Prepaid users

Balance for prepaid users ALWAYS should be more then zero. Otherwise prepaid user will be unable to dial-out.

Credit for prepaid users is ALWAYS zero.

Note: balance and credit are set for users – not devices. E.g. if user has several devices and his balance/credit does not allow to make any more calls – that means he will be unable to use any of his devices.