The unit can deliver either the CallerID.com Whozz Calling? format or the alternative TCI/Bek-Tel format. DIP switch number 7 control the unit output format. Refer to the table below and Fig. 2:

Figure 2.1. CallerID.com Format (DIP Switch #7 set OFF)

Figure 2.2. TCI Format (DIP Switch #7 set ON)

The CallerID.com format is recommended since it is the industry standard. This format is used with all other CallerID.com products with serial output. Several software vendors have adopted this standard since it gives them the flexibility to handle any type of call accounting application. The CallerID.com format provides additional fields for outbound digits dialed, inbound digits dialed after answer, number of rings before answer, call duration, and type of distinctive ring pattern. The Standard Whozz Calling? reports this additional phone call information. Even if your present application does not require this additional information, we still recommend using the CallerID.com format so that future applications may be converted to read the additional data. Please refer to Fig. 2a for the exact format specifications.