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No Ranging Response - T3 timeout Cisco DPC3939B

We have been trying to troubleshoot some VPN throughput issues and decided to check the logs on the modem; lots of [Docsis][562]: No Ranging Response received - T3 time-out running through the event logs. 

 

Is this more likely an issue with the modom or with the signal? Screenshot of the signal attached.

 

Any input is appreciated.

 

Sig1.JPGSig2.JPGSig3.JPG

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