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<div class="moz-cite-prefix">On 2/26/21 8:26 AM, Taraldsen Erik
wrote:<br>
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<font style="font-size:11pt" face="Calibri, sans-serif"><b>Fra:</b>
Nils Andreas Svee <a class="moz-txt-link-rfc2396E" href="mailto:me@lochnair.net"><me@lochnair.net></a></font><br>
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<div dir="ltr">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.<br>
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<div>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.</div>
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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.<br>
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<div>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).</div>
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<div>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.<br>
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<p>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.</p>
<p>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.</p>
<p>I wanted to try and lock it to 1800Mhz, but there's no option for
that exposed in the GUI that I can find.<br>
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<blockquote>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).
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<p>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.</p>
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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.<br>
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<p>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</p>
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<div>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 "<span>at^datalock=" command. </span><br>
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<div>telnet LAN_IP 20249<br>
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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 <i>at)</i>, 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.<br>
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<div>This is getting LTE/5G spesific. Not sure if it belongs
on the list. Let us know if we are generating noise.</div>
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<div>-Erik<br>
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