Method for stabilizing bts using e1 trunk board duplexing of bsc

A method for stabilizing a BTS by dualizing an E1 trunk board in a BSC, wherein the method operates the E1 trunk board in a dual mode by establishing at least two E1 interfacing connections between the BTS and the BSC. This is so that the BTS continues to provide a service through an available E1 link even though one of the E1 interfacing connections is disabled, thereby improving the maintenance capability of a communication system. The method comprises the steps of determining whether a pair of HNEA-A2 boards are mounted or demounted; checking a next board where the pair of HNEA-A2 boards are demounted and determining whether the pair of HNEA-A2 boards are mounted on upper and lower shelves; setting an identical address to the pair of HNEA-A2 boards where the pair of HNEA-A2 boards are mounted on the upper and lower shelves and checking status of the pair of HNEA-A2 boards mounted on the upper and lower shelves; communicating data with the BTS where the pair of HNEA-A2 boards are normal and checking whether all of the pair of HNEA-A2 boards are abnormal; interrupting a service of the BTS when all of the pair of HNEA-A2 boards are abnormal and communicating data with the BTS through a board out of the pair of HNEA-A2 boards where the board is normal; setting an address to one of the HNEA-A2 boards where the addressed board is mounted on the upper or lower shelf; checking whether the addressed board is normal; and communicating data with the BTS through the addressed board where the addressed board is normal and interrupting a service of the BTS where the addressed board is abnormal.