account- If account is given and it exists, the counter is specific for the account.
If account is a domain and the domain directory exists, counters are specific for a domain.
name- The name of the counter is a string, up to 10 characters.
operand- The counters never goes below zero. Valid operands for changing the value of a counter when assigning a value are:
i- Increment by value.
d- Decrement by value.
s- Set to value.
This documentation was imported from Asterisk Version SVN-branch-1.8-r371590r379342