METHOD FOR THE AUTOMATIC INSERTION OR REMOVAL OF A CALLING NUMBER IDENTIFICATION (CNID) BLOCKING PREFIX FROM WITHIN A TELEPHONE NUMBER IN A PERSONAL COMPUTER BASED TELEPHONE MANAGEMENT SYSTEM

摘要

With Calling Number Identification (CNID) service, Frequency Shift Keying (FSK) data is sent over the tele- phone lines to the telephone service customer. A tele- phone subscriber may prevent their name/number from being transmitted to the party they are calling on a per call basis by dialing a prefix before they dial the desired number. The present invention allows for the automatic insertion/removal of that prefix in the number stream when the called party's number is dialed. This feature is accomplished by inserting a $ character into the dial- ing sequence. If the blocking feature is enabled, the $ is translated to the numeric sequence necessary to pre- vent the transmittal of one's telephone number. In the alternative, the $ is translated to a meaningless delim- iter if the feature is disabled.