Caller Blocking

This feature is used to block callers from particular numbers (for example to block abusive callers) or even block callers with caller ID turned off.

This feature works even when IVM is in Off mode.

Note that the caller ID information is sent between the first and second rings on normal telephone lines, therefore you should answer after the second ring.

Block Numbers

Enter the number that you want to block. To block more than one number list the numbers separated with a semicolon. You can also specify a number prefix - in which case IVM blocks all calls starting with that number.

Block Private or Unknown Numbers

If this is ticked any call with caller ID turned off, blocked or not carried by the network will be blocked.

If call is blocked... Disconnect the call immediately

If selected, IVM will pick up the call, play a short tone and then hang up on any blocked call.

If call is blocked... Answer this OGM

If selected, IVM will answer the call with a special OGM which you can record. A typical example might be where you want to avoid private caller ID you might select an OGM with the message "For security reasons we cannot accept calls with caller ID turned off. Please call from another phone which supports caller ID".