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RBM33G + LTE Theoretical speed limit

Posted: Thu Feb 04, 2021 6:18 pm
by lietuvis
So according to the wiki, RouterOS supports LTE Telit LM960 which in theory can do 1.2gbps.

Now let's say we have ideal conditions, 4*CA, early in the morning so the cell tower is not overloaded, what speeds can I expect from RBM33G + LM960 ?

MiniPCI-e will max out at usb2 speed, if I understand correctly, but even so it won't probably be even near the usb2 480mbps limit ? What about plugging into usb3?

300mbps ? 400mbps ? 600mbps ?

Thanks!

Re: RBM33G + LTE Theoretical speed limit

Posted: Thu Apr 01, 2021 11:46 pm
by SiB
Check a block diagram, both mPCIe slots use USB 2.0 bus then it's limited to 480Mbps.
only USB 3.0 is as USB port only :(

Re: RBM33G + LTE Theoretical speed limit

Posted: Thu Apr 08, 2021 10:11 pm
by BitHaulers
Most flash drives max out at ~240 Mbps of throughput under ideal conditions. So I'd think the mPCIe slots would approach that. I also assume that's shared between both mPCIe slots, not each. If you used a USB sled, and used the USB 3.0 port, I think that's attached to a different bus. You'll probably be CPU/driver limited. I don't think anyone knows the throughput yet. You could try benchmarking it with a flash drive to get a ball park, but I'm not sure how well the metrics are reported in RouterOS to be able to do that. Plus the overhead is probably different between disk access and a wireless driver.