When an iTero or TRIOS Scan Won't Upload: Scanner Network Requirements and Who to Call

The patient has left, the aligner case is due at Align today, and the scan is still sitting on the iTero screen with "Failed to send". The front desk asks whether to call iTero support or the IT company, and nobody is sure. That question often turns into phone tag, and it has a fairly clean answer once you know what each side owns.

Need Align directly? Use Align's official iTero support page. If you want to know how Legend works with practices on the network side, see our dental IT support page. This guide sits under our orthodontic practice technology guide and covers iTero, 3Shape TRIOS and Medit: a who-to-call table, a 5-minute triage, the network figures each vendor publishes, a worked upload example, the TRIOS Windows 11 question and a monthly check.

iTero support or IT support: who should you call?

Call the scanner's vendor when the problem is the scanner, its software, your account, the lab connection or ClinCheck. Call your IT provider when the problem is Wi-Fi, the internet line, the firewall, a PC or the server the scanner talks to. The table below sorts the common symptoms; many of them land in the IT column.

A simple rule covers the grey areas. If something outside the scanner also misbehaves (other PCs, phones, the practice software), start with IT. If only the scanner misbehaves and the network tests in the next section pass, start with the vendor. Align's self-service tools let a practice admin manage users, connect labs and reassign cases without a call.

If the triage keeps pointing at the network, a Free Dental IT Assessment gives you written findings and prioritized recommendations on your computers, software, network security, backups and performance.

iTero troubleshooting: the 5-minute triage before you call anyone

Run these seven checks in order. Each takes under a minute, needs no admin password and tells you which column of the table above you are in. If every check passes, the problem is almost certainly on the vendor's side; if one fails, you have the detail your IT provider will ask for.

The outcome rule. Steps 1 to 4 or step 6 failed: call your IT provider and give them the signal reading, the speed-test result and what changed. Step 5 found a LAN cable on an Element 5D or Lumina: unplug it, as Align's warning says. Step 7 failed, or everything passed: call Align. If the scanner needs a restart, follow Align's own steps on the iTero support page rather than a procedure from a third party.

Write down the time, the chair and the results as you go. Intermittent problems are hard to diagnose from memory, and three dated notes from the same chair usually reveal a pattern that one phone call cannot.

What network does an intraoral scanner need? The spec sheet by vendor

Each scanner vendor publishes its own network figures, and they differ more than most offices expect. An iTero sends scans to Align's cloud over Wi-Fi and asks for 1 Mbps of upload per scanner. A TRIOS on TRIOS Share talks to its PC over 5 GHz Wi-Fi. A 3Shape Unite setup asks for 20 Mbit/s of internet as a minimum.

Vendor figures checked 26 October 2026; vendors change these with each release. The Element 5D manual is dated 2020, and the Element 2 and Flex manuals carry the same Wi-Fi tips. The iTero Lumina user manual (© 2024, Rev. D) repeats the 5D's Wi-Fi, upload, signal and distance figures, lists only port 443 for the firewall and carries the same warning never to connect a LAN cable. For any other model, ask Align which figures apply.

Firewall and network rules Align publishes for the scanner

These are the lines in chapter 11 of the Element 5D manual that your IT provider needs to see before changing the firewall or joining PCs to a domain. They are written for "the office IT personnel".

3Shape makes the same point about hostnames for Unite: its software "uses URLs to identify service endpoints, not IP-addresses", and a firewall that allows traffic by IP address can stop working as those addresses change. If your firewall rules were written by IP, that is worth a review.

What internet speed does an iTero need?

Align asks for an upload speed of at least 1 Mbps per scanner. Upload is the figure that matters, because the scanner is sending files to Align's cloud, and the requirement adds up: three scanners need 3 Mbps of upload before the rest of the office takes its share. For scale, Align says the mean time from a practice sending an iTero scan to the lab receiving it was 4.6 minutes across 10,000 scans, and that "Transfer times may vary based on internet connection" (Align, data on file as of February 12, 2020). The next section shows the arithmetic.

Does the scanner need its own Wi-Fi network?

A separate scanner network (its own SSID) on 5 GHz with WPA2, kept off the guest network, makes the vendors' rules easier to meet: TRIOS Share needs 5 GHz, and both Align and 3Shape set signal floors that a crowded network makes harder to hold. How guest, phone and camera networks should be split for the whole office is covered in the network section of our orthodontic practice technology guide; for the design work itself, see our dental office network design page.

How much upload does your office need? A worked example

Add up the upload each vendor asks for, per device, then leave room for everything else that sends data out of the office. The vendor figures are minimums for one system each; your line has to carry all of them at the same time, during your busiest hour, not before the first patient when the speed test looks good.

The formula: required upload = (iTero scanners × 1 Mbps) + (practice software workstations × the vendor's per-computer upload) + everything else that uploads during clinic hours.

This example is illustrative: three iTero scanners and eight Cloud 9 workstations. Swap in your own counts and your own software vendor's figure. If you run cloud practice software, our guide to cloud or server orthodontic practice software covers its internet needs. Planet DDS also suggests that offices using VoIP consider quality-of-service controls so other traffic does not affect call quality.

Two cautions keep the arithmetic honest. First, if your TRIOS runs on 3Shape Unite, 3Shape's own minimum is 20 Mbit/s of internet upload and download, which is already larger than the example total. Second, TRIOS Share's 36–112 Mbps figures are for the local Wi-Fi link between scanner and PC, not your internet line; they size the access points, not the internet plan.

If the line itself keeps dropping, our checklist for what to check when the office internet goes down covers the first hour.

Why scans fail in an open bay (and what to change)

Open orthodontic bays put several chairs, several scanners and many patient phones in one room, often with the access point in a hallway or closet. Align's manual explains the physics: each wall can cut range by 1 to 3 meters, metal, glass and file cabinets reduce the signal, and 2.4 GHz cordless phones can degrade or drop the link.

Six changes, on the scanner side only:

If the office is still being built, access point placement is far cheaper to get right before the ceiling closes; our orthodontic office technology checklist for a build-out covers that stage.

Can a TRIOS cart run Windows 11? What to do if yours can't

It depends on the cart. 3Shape says TRIOS MOVE and TRIOS 3 carts "are not compatible with Windows 11" because their processors are not supported by Microsoft, so they cannot be upgraded. First-generation TRIOS MOVE+ units (shipping since April 2019) can be upgraded. Second-generation MOVE+ units (shipping since September 2023) come with Windows 11.

3Shape's Windows 11 FAQ and its Windows 10 end-of-life article set out the rest. Microsoft ended Windows 10 support on October 14, 2025. 3Shape says a TRIOS system on Windows 10 keeps full scanning functionality and 3Shape continues software updates; for first-generation MOVE+ it keeps remote support, repairs and replacements until October 2028. From Unite 25.1, the Unite Store shows a warning on Windows 10 systems. Time-limited trade-up offers go through your 3Shape reseller and also need Unite 24.1 or higher.

What to do this month:

1. 1. Read the serial number on the label at the back of each MOVE+ screen and write down the generation.
2. 1. Check the Unite version on each cart; anything below 24.1 needs updating before any upgrade or trade-up.
3. 1. For a first-generation MOVE+, decide with your reseller whether to upgrade, stay on Windows 10 or trade up, and book the upgrade with 3Shape support.
4. 1. Ask your IT provider to keep any Windows 10 cart off general browsing and email, since Microsoft ended Windows 10 support on October 14, 2025.

The scanning computer itself, in short: 3Shape keeps a catalogue of TRIOS-approved PCs and asks that scanning PCs come from it, and Medit asks for one PC dedicated to the scanner. For the wider Windows 10 picture, see Windows 10 end of life for dental practices and budgeting the Windows 10 transition.

TRIOS and Medit: the network rules that trip offices up

Many TRIOS and Medit network problems come from a few settings that ordinary office Wi-Fi gets wrong: a 2.4 GHz band, a captive portal, multicast filtering or client isolation. 3Shape and Medit publish these rules on their own support sites; the checklist below is the short version to hand your IT provider.

For application problems, use the vendors' own help centers: 3Shape support and Medit support.

Sending scans to the lab: portal, not email

Send scans through the vendor's lab connection, not as email attachments. iTero has a Connect Lab tool to sync digital prescriptions with your preferred labs, and 3Shape says its Communicate service uses TLS 1.3 with AES-256 encryption, encrypts personal information at rest and logs users off after 15 minutes of inactivity.

For what is changing in the HIPAA Security Rule, see our summary of HIPAA Security Rule updates for dental practices; questions about how a rule applies to your practice belong with your compliance lead or counsel.

Your monthly scanner health check

A short check once a month catches much of the slow drift that turns into a failed upload on a busy day. Do it on the same day each month, at the same hour you scan most, and keep the results in one place so the next call to IT or the vendor starts with dated numbers.

What to have ready before you call Align, 3Shape, Medit or IT

Whoever you call, the first questions are the same. Have these ready and the call starts at the diagnosis instead of the basics.

What to ask your IT provider:

1. 1. What upload do we have at peak hours, and how does it compare with our scanners' and software's vendor figures?
2. 1. What is the Wi-Fi signal in dBm at each chair where we scan?
3. 1. Do our firewall rules follow Align's port, FTP, proxy and domain rules, and 3Shape's URL-based rules?
4. 1. Are our scanners on their own 5 GHz SSID, separate from guest Wi-Fi?
5. 1. Which of our scanning PCs and carts are still on Windows 10, and what is the plan for each?

How Legend handles scanner problems

When Legend is a practice's IT provider, our side is the network, Wi-Fi, workstations, servers and internet line around the scanner; the scanner, its software and its account belong to the vendor. That split is the same one the table at the top of this page uses.

This guide comes from Ian Lynch, who has 22 years in dental IT and oversees the NOC, onsite dispatch and client technology roadmaps. If imaging software rather than the scanner is the problem, our guide to troubleshooting dental imaging integrations covers that side.