The MX67C has a cat 6 LTE radio which is rated at 300 Mbps down/50 Mbps up. So, I would expect to see those numbers as a maximum value.
The wired WAN interfaces should support up to 600 Mbps up/down.
Ryan If you found this post helpful, please give it
Kudos. If my answer solves your problem please click
Accept as Solution so others can benefit from it.