Caller ID Block allows you to mask your name and number information from appearing on the phone you are calling.  To use Caller ID Block for one call only, dial *67 and then the destination number.  To enable Caller ID Block on a permanent basis, dial *81 from your Chipmunk Tel phone.  All calls will use the Caller ID Block feature until you cancel the Caller ID Block.  To cancel the Caller ID Block, dial *82.