The intercept of the incoming call from an indefinite telephone number. During the call intercept the callers should present themselves and after that they will be connected with the subscriber who will have a reproduced name of the caller. One must have Caller ID in order to use Call Intercept.
Netropolitan Works builds secure VOIP in Thailand Asterisk systems and can do it in a way that makes sense for your business! http://www.NetropolitanWorks.com/VOIP-Thailand-lp.html