MSR 50-40 SIC-2E1-F板卡硬环测试，AL/LP指示灯状态是常亮吗？

MSR 50-40 SIC-2E1-F板卡硬环测试，AL/LP指示灯状态是常亮吗？

路由器：MSR 50-40

板卡：SIC-2E1-F

请问2M线环回测试时，AL/LP的指示灯应该是常亮还是闪烁。

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