中兴zxctn6120s,zxctn6150,zxctn6180,中兴ptn传输设备
zte zxctn 6150 zte zxctn6150 multiple service packet transport
zte zxctn 6150 zte zxctn6150 multiple service packet transport
中兴6150中兴6150传输设备代理分组传输设备
zte zxctn 6150 zte zxctn6150 multiple service packet transport