Number Pool
Description
Number Pool is array of various numbers. Number Pool can be used for Device or Provider as CallerIDs. This functionality gives you an ability to send different caller number on each Call. When Number Pool is chosen as CallerID in Device or Provider, during the Call system takes random number from all array of numbers which belongs to selected Number Pool. It is useful if you want to send different CallerID on each Call even if it is made from same Device.
Number Pools are also used in Static Blacklist/Whitelist to deny/allow specific numbers or prefixes.
Usage
Go to SETTINGS –> Billing –> Functions –> Number Pools
Here you are able to see list of all Number Pools which you have:
Also you can 
Add new Number Pool, 
edit or delete old one. Click on details icon to see array of numbers in chosen Number Pool.
Here you are able to import new numbers (any number, leading "+" or "#" or a "%" wildcard is allowed in a number), delete the old ones or search for specific ones in a list. Wildcards such as "%" or "_" are available to use in the search form (e.g. search for "370%" will result in finding all numbers that begin with 370). If it is necessary to search for numbers such as "370%", the wildcard has to be escaped: "370\%".
Number Pool as Device CallerID
Go to Device settings and choose Number Pool as CallerID
Number Pool as Provider CallerID
Go to Provider settings and choose Number Pool as CallerID
Number Pool as Blacklist / Whitelist
Go to User settings or Provider settings and choose Number Pool as Blacklist / Whitelist.
Note: when using Number Pools for Blacklist/Whitelist, it is possible to upload prefixes. To do so, just import prefixes with percent (%) or pound (#) sign at the end (example: 370% will act as prefix for 370xxxxxxxx number or 370######## each # represents ONE digit so using it this way you can determine the length of acceptable CallerIDs ).
