“Call filter” allows blocking/unblocking the incoming calls as easy as to make filtration, it also journalizes all rejected calls. It is very convenient if you do not want to receive a call from some subscribers, when they will call you, “Call filter” will do so that your line is engaged.
The Center of the System Administration was founded in 2001, in order to satisfy the needs for IT services of small-to-medium scale organizations by providing Open Source Software solutions.