Arrangement for providing priority override of billing buffer entry selector

Claim 1

In a communication system wherein complete records of information related to calls within said system are produced from data comprising initial entries from a call processor and trunk scanner entries from a trunk scanner, said system comprising a billing buffer for storing said initial enries and said trunk scanner entries, a billing buffer entry selector monitoring said call processor for requests for initial entries and said trunk scanner for trunk scanner entries and providing them access to said billing buffer for storing said entries therein, a trunk scanner buffer, said trunk scanner entries being coupled from said trunk scanner through said trunk scanner buffer to said billing buffer, said trunk scanner buffer having only a single queue for storing and coupling said trunk scanner entries into said billing buffer, and control means for providing a priority override of said billing buffer entry selector for said trunk scanner entries in the event another request for a trunk scanner entry is received while said queue is full to avoid trunk scanner congestion, said control means comprising latch means in said billing buffer entry selector, gating means coupled to said latch means, said gating means normally being enabled with established command signals coupled thereto in coincidence to operate said latch means to a first state to provide said call processor access to said billing buffer and to a second state to provide said trunk scanner access to said billing buffer, and latch control means operated upon receipt in coincidence of command signals indicating that said queue is full and a request for a trunk scanner entry is disable said gating means to prevent said latch means from being operated to said first state, whereby said latch means remains set in said second state and provides said trunk scanner access to said billing buffer until the trunk scanner congestion is cleared.