Jump to content

How to Identify T-Mobile network equipment (Ericsson)


lilotimz

Recommended Posts

T-mobile Ericsson Cell Equipment

 

For Ericsson markets t-mobile uses what is known as AIR antenna units which have the radio unit integrated with the antenna. This type of setup significantly reduces signal loss from the radio to the antenna since they're both practically next to each other and not sepearated by coax jumper cables like that of a remote radio unit.

 

Basic Ericsson AIR21 setup

(Note typically there are 2 Ericsson AIR per sector)

duwGQ3X.jpg

 

Rxtis9g.jpg

 

6ZH5KqX.jpg

 

Ericsson AIR21 + Band 12 700 mhz Equipment

 

Note the addition of a new low band 700 mhz capable antenna + Ericsson RRUS11 B12 (remote radio units) in addition to new TMA (tower mounted amplifiers) connected to the AIR antenna. The new Ericsson RRUS11 B12 + Antenna addition is for tmobiles band 12 700mhz (L700) deployment. 

25f06bb.jpg

(Credit: tmo.rocks)

 

Credit for the photographs belong to whoever took it. You know who you are! :)

  • Like 5
Link to comment
Share on other sites

Glad to see you like my photo [i got lots more ;)Here is my related post from another thread:

 

 

For Ericsson AIR21 sites, there is currently one active PCS HSPA+/GSM and passive AWS HSPA+ plus one active AWS LTE and passive mid-band empty. 

  • Like 1
Link to comment
Share on other sites

  • 2 weeks later...

Why is Sprint not using the Air antenna type?

 

Was not commercially available and does not support CDMA. 

 

Originally, the radios were inside the cabinets on the ground. Power and data cables flow into the radios, and a broacast signal flows out to the antennas over coaxial cables. As soon is this happens, you have signal attenuation and an opportunity to introduce interference. An RRU lets you move the radios out of the cabinet and closer to the antenna, thus reducing the attenuation. The AIR antenna effectively builds the RRU into the antenna, making the effective distance almost zero.

 

Now an RRU can give you 98% of that benefit, if you mount the RRU right next to the antenna. Or you can mount the RRU further away from the antenna (maybe the structure can't support that much weight at that height), but you introduce more signal attenuation/interference the further from the antenna you move it. So you get some additional flexibility using that setup. But it does make the setup a little more complicated, and there may be some benefits in terms of total weight or wind loading by combining the RRU and antenna into a single unit. So there are pros and cons to doing AIR vs antenna and RRUs. But naturally if it wasn't available at the time and doesn't support CDMA then it wasn't an option for Sprint.

  • Like 1
Link to comment
Share on other sites

  • 1 year later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • large.unreadcontent.png.6ef00db54e758d06

  • gallery_1_23_9202.png

  • Similar Content

  • Posts

    • I've now seen 100 MHz n77 from SoftBank and 100 MHz n78 from NTT. NTT seems to be a bit better south of Osaka, though in some cases it drops down to B19 LTE as some areas around here are pretty rural. SoftBank has n77 around, but it's flakey enough that I switched eSIMs earlier this morning.
    • I'm currently typing this from a bullet train headed from Tokyo to Osaka. Using a roaming eSIM rather than T-Mobile as it's a lot cheaper, but I'll start with T-Mobile's roaming experience. Since I have a business line, I can't add data packs online, so I'm just using the 256 kbps baseline service you get by default. That service runs on Softank 4G. SoftBank has a well-built-out LTE network though, with plenty of B41, falling back to B1/3/8 as needed. 5G roaming from T-Mobile doesn't appear to exist though. I've seen 20+10 MHz B41 when I've looked, generally speaking. WiFi calling works well, and voice calls over LTE work fine too (I forgot to turn WiFi back on after doing some testing, so I expect my bill to be a dollar more next month). I want to say I even got HD voice over the cell network for the VoLTE call I did. I have a bunch of eSIMs and a couple of physical SIMs to try out. I've gotten the eSIMs up and running, but last I checked the physical SIM wasn't working even after activation so I'll run through eSIMs for the moment and update this thread with pSIM info and details on not-Tokyo in the coming days. First off, there's US Mobile's complimentary East Asia eSIM (5GB) that I grabbed before my unlimited plan Stateside expired. That SIM uses SIM Club, routing through Singapore, running on SoftBank LTE and 5G. I've seen 40 MHz n77, as well as 10x10 n28, and have seen download speeds in excess of 200 Mbps with uploads of more than 50 Mbps, though typical speeds are slower. Routing is via Equinix/Packet.net. 5G coverage is rather spotty, but LTE is plenty fast enough; either my phone doesn't want to use the 5G band combos that have more coverage or 5G coverage is just spottier here than in the US (at least on T-Mibile). Latency is as low as 95ms to sites in Singapore (usually closer to 120ms), which is pretty great considering the 3300 mi between Tokyo and Singapore. Next there's Ubigi. It also routes through Singapore via Transatel (despite being owned by NTT), and sites on top of NTT docomo's network. I didn't see NTT 5G in Tokyo when I tested it, but since then I've seen 10x10 n28, and have seen B1/B3/B19 on the LTE side. So far it's not the fastest thing out there, but I'm guessing coverage will be a little better...or maybe not. This was $17 for 10GB. Latency is a bit higher to Singapore, but still under 150ms it seems. Then there's Airalo, which was the cheapest when I bought it at $9 for 10GB. It also routes through Singapore (on Singtel), but on my S24 I have my pick of KDDI (au) or SoftBank. KDDI has extensive B41 coverage and I've seen 20+20 with UL CA. While waiting for the train at HND Terminal 3 (Keikyu line) I hit 250+ Mbps down and 10+ Mbps up...over LTE...with pretty respectable latency numbers (not much above 100ms). This is in adition to supporting SoftBank, also on LTE (my S24 defaulted to KDDI, while my wife's Pixel 8 defaulted to SoftBank and didn't seem to want to connect to KDDI). Of the various carriers mentioned, I'd say this was the best pick, though prices have bumped back up to $18 for the 10GB plan...but it's probably still what I'd pick if I had to pick just one carrier. Then there's Saily, which uses Truphone out of Hong Kong. I haven't used this as much, as I only grabbed 3GB for $7. It runs on NTT but doesn't seem to have 5G access and doesn't seem to have as good speeds. Yes, Hong Kong is way closer to Japan, but latency didn't seem to be any better, at ~150ms. In all cases, I've had reception even in train tunnels and even at high speed on the bullet train, on all three carriers I've tried (I don't think I'll be able to play with a Rakuten SIM, which is rather disappointing). There have been cases where service has degraded, but it looks like you'd have reasonable cell service no matter which of the big three carriers you picked...and since T-Mobile roams on one of them, that's good enough if you're content to buy day passes.
    • https://www.phonearena.com/news/t-mobile-older-rate-plan-prices-june_id157821 We're on Sprint Max for our seven phone/two Apple Watch (with Cellular) family plan... Because it doesn't make sense to switch to anything else, especially if we can't even finance all of our devices. Some of you may recall that T-Mobile suddenly cut our credit limit to $1,500 (which is barely more than one iPhone 15 Pro) with no notice at all. I escalated it to the Office of the CEO and was told to pound sand, even though I have 800+ Credit as a longtime customer and was suddenly being treated as a deadbeat. I ultimately upgraded my three iPhone lines directly through Apple and they're Unlocked. I haven't bothered to check on whether my Credit Limit has updated, but I don't plan on upgrading them through T-Mobile again. I guess we'll find out if "Sprint Max" counts as "older" soon enough.
    • From just under a week ago: https://www.t-mobile.com/news/network/t-mobile-announces-163-million-in-completed-network-upgrades-for-arkansas Progress!
  • Recently Browsing

    • No registered users viewing this page.
×
×
  • Create New...