Abstract: An individual telephone line call event buffering system is disclosed which provides backup memory storage for incoming and outgoing call events, including calling line identification (CLID) information in a computer based telephone line monitoring system when the computer or its call processing application software is off-line. The call event buffering system includes a hardware based call processor, distribution controller and memory system, and a software based computer monitoring system, all of which operate in conjunction with a standard personal computer, a standard telephone line, standard telephone line equipment including, but not limited to, a telephone, facsimile, and modem, and standard telephone central office services including, but not limited to, Caller-ID, distinctive ring, call transfer, forwarding and conferencing, voice mail, and visual message waiting.