A trunk circuit interfaces a multichannel data signal to a communication facility using a high priority queue (HPQ) memory, a low priority queue (LPQ) memory, and a data packet sorter including a separate LPQ counter for each data channel. Each LPQ channel counter keeps track of data packets from the...http://www.google.de/patents/US4644533?utm_source=gb-gplus-sharePatent US4644533 - Packet switch trunk circuit queueing arrangement
