URGENT: USR LED status

USR LED is blinking once fast, then off for a long period of time. I need to know what this is ASAP, I have a customer who has been down because they rebooted their machine and now I am unable to connect to their router. I asked them to perform a L1 reset, and that has now caused the USR light to blink, and I still cannot connect.

Can’t find ANY manual describing ANY of these so-called codes, RG-001 does not contain this information, please fix your documentation.

It may be one of the following error codes below: both of these should be in RG-001 though

RG-001-0-EN-(General Reference Guide)3.0 (4).pdf (7.1 MB)