Do you know what calls are being made on your phone when you're away? The new Telephone Number and Data Logger automatically keeps a detailed record of all outgoing calls on your line. Records the start and stop time of ALL outgoing calls along with the number dialed (plus any other digits pressed during the call including credit card #s, bank accounts, voice mail pin codes, etc...). It operates "stand alone" - no need for any connection to a PC. Data is stored in non-volatile so there is no loss of data during power failures. The logger can record over 2800 10-digit telephone numbers ( that's 28,000+ digits ). The logger will record about 8 months worth of calls for the average household. Logged data can be downloaded into a PC via a serial port and saved to disk. The data is formatted so that it can be easily imported into Microsoft Excel©. As a bonus, call data is output in "real time" to the serial port in addition to being recorded to memory. This is useful when immediate call analysis and/or external data logging is required. Two phone jacks are provided on the rear panel, marked "LINE" and "PHONE". This allows a telephone to be connected and used even when the logger is put in its place.