Patent ID: 6873623
Filing Date: 2005-03-29
Classification: H04M,H04Q

Abstract:
1. A test access unit for coupling high speed data in a digital loop carrier system having a plurality of voice line cards, a plurality of digital line cards, and a backplane including a time division multiplexed bus for routing voice data and a test bus, said test access unit comprising: a data bus interface circuit coupled to route said high speed data to and from said plurality of digital line cards over a subset of said test bus, whereby said high speed data is routed over said backplane to or from said plurality of digital line cards without interfering with said voice data routed over said backplane; an aggregation multiplexer circuit coupled to aggregate and multiplex said high speed data from, and to demultiplex and deaggregate said high speed data to, said plurality of digital line cards via said data bus interface circuit; and a digital carrier interface circuit coupled to interface said high speed data between said aggregation multiplexer circuit and a high speed digital network.