| 摘要 |
Stacking of Digital Subscriber Line Access Multiplexers (DSLAMs) is accomplished in multiple communications schemes using a master DSLAM (12) having a control circuit (24) and an uplink communication circuit (26) to a central office and two LVDS circuits (28a, 28b) for communication with two DSLAM boxes in adjacent circuit interconnection to the master DSLAM. Multiple slave DSLAMs (14) each having a programmable control circuit (34) and two LVDS circuits (36a, 36b) for communication with two DSLAM boxes immediately adjacent on either side in the circuit are connected in a ring or split stack arrangement to allow a round robin in a first selected mode and a split in a second selected mode to accommodate the desired structure and to provide redundancy for failure by reprogramming from round robin to split to communicate around a failed slave DSLAM. |
