On 2/26/21 8:26 AM, Taraldsen Erik wrote:
*Fra:* Nils Andreas Svee <[email protected]>
I am indeed running them on Ethernet. I don't actually use the
B818 for anything else than as a LTE modem, so I wouldn't know, if
I could get the thing to bridge I would. Or replace it with
something else entirely that I can control, but that doesn't seem
to be an option on FWA. That said the Zyxel looks like a better
option since I assume it acts like a bridge by default.
The Zyxel device indeed acts as a bridge, or at least as close
approximation as we can get it. The PDP addressing protocol in mobile
networks requres the address termination to happen where the SIM card
resides. So the device does some trickery with brctl, routing and
iptables to simulate a bridge setup.
Oh nice. Sure it's not a "true" bridge, but for all intents and purposes
it gets the job done. Kinda tempting to get one of those now, if only to
avoid the whole using DMZ mode on the B818 to pass everything through.
I dumped the raw signal stats the web interface grabs in an XML
file together with the Flent tests. Also did some upload only
tests tonight at different speeds (no VPN in play this time).
rsrp is good and rsrq is great at your location. However you have
ended up on the 800MHz band. That is intended for coverage, not
capacity. It uses only 10MHz bandwitdh and is shared with a lot more
customers. You probably should be able to get an 1800MHz frequency
which has 20MHz and is shared among fewer customers.
Yeah I thought it should be pretty good. I don't really know how to
interpret those numbers, but Teltonika's guidelines seemed to indicate
that it should be good.
Good point about the bands. For the first months after we signed up it
tended to switch between 800Mhz and 1800Mhz and mostly stay on 1800Mhz,
but now it's been stuck on 800Mhz for quite some time.
I wanted to try and lock it to 1800Mhz, but there's no option for that
exposed in the GUI that I can find.
Most likely yes. That's been my observation as well, that it
generally acts up the worst when somethings using the upstream.
Not entirely sure what I can do about that, seeing as I had to
shape at 5Mbit to get rid of the worst spikes (but not all).
This is tricky. You don't have a static set of resources. You
request resources "as needed". The "as needed" amongst other things
reads the buffer back pressure. So if you shape to far down the LTE
device will not request enough resources. Shape to high and there
will not be enough resources available to share. And available
resources vary with number of subscribers on that cell, weather, the
subscribers usage and interference from other cell towers. To get a
proper solution to this I don't see a way around getting the chipset
manufacturers on board.
Downside of shared mediums of course. So basically my best bet is to
find somewhere in the middle to shape on, or use the pping stuff to
somehow dynamically configure it. Of course, but we don't really have a
voice with them, so the best we can do is support your efforts however
we can.
On that point, I would've liked to collect signal stats over time,
but the B818 seems to insist on chucking me out after being idle
for a few minutes, better known as scraping the stats with cURL
Have you tried to use the telnet service port (20249) on the B818?
Not all variants have that open but you could give it a shot. You
also may need to acquire an datalock code for the "at^datalock=" command.
telnet LAN_IP 20249
I had not, I didn't scan higher ports. It *is* open though, so I was
able to connect to it. It only yells at me if I try to run any of the
few AT commands I know (except /at)/, not sure if that's because of the
datalock code. If that's what I'm missing, how does one go about getting
a hold of one of those? When I looked it up I only found some sites I
have concern about the legitimacy of.
This is getting LTE/5G spesific. Not sure if it belongs on the list.
Let us know if we are generating noise.
-Erik
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