我使用华为E173来进行短信收发，以下是我串口监控到的内容，请教一下为何modem总是发出'^BOOT:6385982,0,0,0,20
',这是什么意思？还有AT发着发着modem就死了，不回OK了，这时该怎么办，如何用指令重启modem?
9044 [01797695] IRP_MJ_WRITE Length: 0003, Data: AT
9045 [01797695] IRP_MJ_READ Length: 0006, Data:
OK
9046 [01798035] IRP_MJ_READ Length: 0026, Data:
^BOOT:6385982,0,0,0,20
9047 [01798467] IRP_MJ_WRITE Length: 0003, Data: AT
9048 [01798467] IRP_MJ_READ Length: 0006, Data:
OK
9049 [01798855] IRP_MJ_WRITE Length: 0003, Data: AT
9050 [01798855] IRP_MJ_READ Length: 0006, Data:
OK
9051 [01799242] IRP_MJ_WRITE Length: 0003, Data: AT
9052 [01799242] IRP_MJ_READ Length: 0006, Data:
OK
9053 [01799629] IRP_MJ_WRITE Length: 0003, Data: AT
9054 [01799629] IRP_MJ_READ Length: 0006, Data:
OK
9055 [01800017] IRP_MJ_WRITE Length: 0003, Data: AT
9056 [01800468] IRP_MJ_WRITE Length: 0003, Data: AT
9057 [01800920] IRP_MJ_WRITE Length: 0003, Data: AT
9058 [01801371] IRP_MJ_WRITE Length: 0003, Data: AT
9059 [01801820] IRP_MJ_WRITE Length: 0003, Data: AT
9060 [01802271] IRP_MJ_WRITE Length: 0003, Data: AT
9061 [01802720] IRP_MJ_WRITE Length: 0003, Data: AT
9062 [01803169] IRP_MJ_WRITE Length: 0003, Data: AT
9063 [01803618] IRP_MJ_WRITE Length: 0003, Data: AT
9064 [01803796] IRP_MJ_READ Length: 0026, Data:
^BOOT:6385982,0,0,0,20
------解决方案--------------------
找华为支持呀，我们那时候有问题也是找华为支持