Chasms.com: The Troubleshooting Tool I Used When Remote Access Wasn't an Option

When you support someone over the phone and can't see their screen, every step depends on how well they can describe what's in front of them, and how well you can describe where to click. Chasms.com helps with the second half. It shows reference versions of common operating systems, browsers, email apps, phones and modems, so you can look at roughly what the caller is looking at.

This article covers what Chasms offers, how I'd use it on a call, and where it stops being useful. Chasms is an independent site. It has no connection to this one, and none of the links here are affiliate or referral links.

Why it's here#

When I worked at AT&T I used this website to help fix issues over the phone with users if we couldn't connect remotely.

Jeremiah Ellington

That's the only first-hand claim in this article. The rest comes from Chasms' own pages, read on 27 October 2026, and from general phone-support practice. The examples below are hypothetical and labeled that way. AT&T hasn't reviewed or endorsed this article.

What Chasms offers#

Chasms describes itself as "Visual Troubleshooting Tools for Contact Center Agents." Its About page says the site was founded in 1997 and came under new ownership in January 2022, and that its aim is "clear, visual, emulator-style walkthroughs." Those are the site's own descriptions; I haven't verified its history independently.

The category index listed more than 40 categories on 27 October 2026. Grouped roughly:

• Operating systems: Windows, Apple macOS, iPhone and iPad (iOS), Android, Chromebooks, Linux and Ubuntu.
• Browsers and email: browsers on Apple, Linux and Windows; email on Apple, Linux, Windows, webmail and others.
• Networking: modems and gateways, plus lists of internet providers in the US and Canada.
• Devices: Apple, Samsung and other phones, tablets, e-readers, gaming consoles and streaming TVs.
• Security: antivirus and VPN apps.
• Guides and extras: How-To's, agent dashboards, AI tools, productivity tools, a break timer, a world clock, job boards, a forum, testimonials and the site's own affiliates.

The list changes, so check the index for the current one rather than relying on this summary.

A few categories in more detail, as they appeared on 27 October 2026:

• Windows covers versions from Windows XP through Windows 11 25H2, plus Edge and Chrome on Windows.
• Modems lists gateways from several internet providers and manufacturers. The category describes them as "Modem and gateway walkthroughs — admin pages, Wi-Fi, firmware, and lights."
• How-To's has step-by-step guides such as running ping and tracert on Windows 11 and clearing a browser's cache. Some are old: several cover Internet Explorer and Windows 7.

The Windows 11 25H2 page is a typical tool page. It's labeled "Type: Free" and has a Load Simulator Fullscreen button. The site also has a sign-in link and a paid "Agent Pro" option; I didn't check what that costs or includes. The page says its guide was accurate "as of August 2026" and that features "change over time."

When it helps#

Chasms earns its place when a remote session isn't possible:

• The caller's device has no working network connection, so a remote-support tool can't connect.
• Screen sharing is unavailable or blocked.
• There's no remote-support agent installed, and the caller can't install one.
• The caller isn't comfortable with the device and needs to be told exactly where to look.
• You don't have the same phone, modem or operating system version in front of you.

If you can start a remote session, do that instead. Seeing the real screen beats any reference picture.

How I'd use it on a call#

The idea is to keep the caller's screen as the source of truth and use Chasms as a map.

1. Identify the device, system, app and version

   Ask what the device is and have the caller read the version from their own screen, such as the About page in Settings. Don't guess from the device's age.

2. Open the closest match on Chasms

   Pick the page whose title matches the version, or the nearest one. Check the version in the title before you start.

3. Go one step at a time

   Before each click, tell the caller what they should see. Then let them do it and describe what happened.

4. Check what they actually see

   If their screen doesn't match the reference, stop and work from their description. Updates, provider firmware and company policies all change menus.

5. Don't assume the reference is their device

   A simulator shows a typical setup. It can't show the caller's account, their settings, or anything an administrator has locked down.

6. Confirm the fix and write it down

   Have the caller test the thing that was broken. Then note what was wrong, the steps that fixed it, the version, and which reference page you used.

Two hypothetical examples#

These are made-up examples to show the workflow. They aren't accounts of real calls.

Hypothetical: a laptop that won't connect to Wi-Fi#

A caller says their Windows 11 laptop shows no internet. With no connection, remote access is out. You ask them to read their Windows version, open the matching Windows 11 page on Chasms, and find the Wi-Fi settings on the reference. Then you walk them to the same place, one step at a time, and ask what they see at each stage. When their screen shows something the reference doesn't, you go by their screen.

Hypothetical: checking a modem's status#

A caller's internet keeps dropping. You ask for the model printed on the modem's label and look for it in the Modems category. If it's there, you use the reference to walk them to the status page or to describe what the lights mean. If the admin page asks for a password, the caller types it themselves. If the model isn't listed, you use the manufacturer's or internet provider's documentation instead.

Limits and safety#

• Interfaces vary. Updates, provider-customized firmware and managed devices all change what's on screen. A reference version that's close isn't the same as the caller's.
• It's a reference picture, not remote control. You can't see or change the caller's device through Chasms. Only what the caller tells you is real.
• Old pages stay up. Some how-tos describe software that's long out of support. Check the date and version before you use one.
• Chasms makes no guarantees. Its tool page says it isn't liable for errors or for "reliance on the information." Treat it as a guide, not a specification.
• Link, don't copy. Chasms' pages carry an "All Rights Reserved" notice. If you build your own help-desk notes, link to its pages rather than copying its screenshots or simulators.

Explore Chasms.com#

Explore Chasms.com, starting from the category index. Chasms is independently operated, and all of its content and simulators belong to it. If you're working on the network side of a problem, the Reliable Network Guide explains how modems, routers and Wi-Fi fit together.