The selective call acceptance allows controlling incoming calls by making a list of telephone numbers which you are ready to accept. But incoming calls from subscribers that are not listed are directed to the answering machine by which the caller is informed that you do not accept calls at the moment.
A brief intro on KOL TELECOM:
KOL TELECOM SERVICES LLC. is a USA-based and D&B registered provider of international wholesale as well as retail VOIP solutions. KOL TELECOM currently provides services to more than 100 international long distance carrie