DSL vs 4G LTE

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ira.kirby
Posts: 9
Joined: Wed Sep 26, 2018 8:22 pm

Re: DSL vs 4G LTE

Post by ira.kirby » Mon Oct 22, 2018 1:14 am

Here's the antenna info. I'm ashamed to say I went elsewhere for that, to save money on the coax. I ended up with a used Poynting A-XPOL-0002-V2. It's roughly 17ft off the ground with the included 15ft coax. I'm running the coax through the window until my wife finds out. Then I plan to build a PoE setup of some sort. I'm having to connect to Interstate towers, and I'm probably lucky to get what I'm getting. I don't want to guess, but I'd say I'm 6 miles away with no LOS. I'll get the facts soon.

swwifty
Posts: 76
Joined: Thu Aug 30, 2018 8:21 pm
Location: NE GA Mountains

Re: DSL vs 4G LTE

Post by swwifty » Mon Oct 22, 2018 3:57 pm

Based on the screenshots you shared, it looks like your modem is connecting at times to Band 17 and Band 4. You are likely on the outer edge of a cell, and that is why its hopping back and forth between those bands. I did some research on that Sierra modem you have, and I can't tell if it supports carrier aggregation or not, but you might consider upgrading to one, if it doesn't (you could get a lot more throughput that way).

Your SINR looks better in that status shot (all your other stats look pretty good all other things considered), but its still really really low. Are you positive you're aiming towards the cell tower? Have you tried experimenting with aiming in different directions while the antenna is outside? I'd recommend that, and the higher up in the air you can get it, the better your signal and SINR will be.

Hard to say why your upload speed was faster in that last test, but that upload speed I would not complain about :)

I would do a speed test hardwired into the modem, and one connected via wifi. It's possible that your wifi is really slow, and hence why you see a difference from your phone.

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ira.kirby
Posts: 9
Joined: Wed Sep 26, 2018 8:22 pm

Re: DSL vs 4G LTE

Post by ira.kirby » Mon Oct 22, 2018 6:32 pm

I just wrote four paragraphs with info I half know/understand, and went to post and got redirected to the login page!!!! I'll try again lol. :cry:

I'll ask around about the MC7700, good call if so.

I am definitely on the outer edge of a cell. Picture this: I'm 6 miles away from two AT&T towers (possibly B17 on one and B4 on the other) They are both along Interstate 85. I am horizontal to the Interstate, but 6 miles away. From looking at the antenna on the towers by the Interstate, I can see each is pointed up or down the interstate, and I guess I'm trying to grab that. I have ZERO towers to my left, right, or behind me.(They're there, but way too far off)

I've tested my antenna a full 360° (even the dead zones), little by little, about a minute apart, and this is by far the best signal.

I can't go any higher with the antenna unless I add coax and connectors. But I might try a PoE setup instead, since every little bit of loss adds up and I have minimal to start with.

To clarify, I wasn't mad about the UL speed :D , just thought it was weird and possibly something wrong on my end.

I'll do a wired computer test and wifi phone test and see how that goes. I've learned the hard way that testing my connection through the PS4 is completely unreliable with UL speeds. That's what we mainly use our Internet for, so it was handy haha.

Thanks again!

swwifty
Posts: 76
Joined: Thu Aug 30, 2018 8:21 pm
Location: NE GA Mountains

Re: DSL vs 4G LTE

Post by swwifty » Mon Oct 22, 2018 10:01 pm

It's more than likely that B17 and B4 are on the same tower. You can compare by look at the cell id in your at!gstatus? command.

With my setup (you can see in my thread on the flat panels) I'm only connected to one physical tower. The term cell though actually typically refers to one radio on the cell (typically one antenna per radio on a tower, even though there are tons of them there). In my experience, if you get a good signal to a band that is a higher frequency, your modem will select that as primary. This is because the lower frequencies are more valuable to the service provider (AT&T) because it extends the coverage of the cell significantly due to better propagation characteristics. That being said, if I drive close to the tower I'm connecting to at my house, it will always select Band 2 over Band 12.

You are probably right that the sector antennas for that tower are more likely focused on the interstate than your area. That doesn't mean there isn't any though. I'd recommend driving to it, and taking a peak. Even better if you can take your whole modem/antenna setup and test it with clear line of sight to the tower (You'll have to find a way to power your setup remotely, but you can do that easily with a cigarette outlet converter in a car).

I'd recommend getting that antenna as high as you can, and also, before you go the PoE route, testing this setup, so you can see if your time is not wasted. I really believe if you can get that SINR value up as high as possible (even a value of 7 to 10 would be a huge improvement) you'll get much faster throughput, and a much more reliable link.

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