--- {"title": "How to hear STOP and SLOW on a headset at height in 2026", "description": "Tower crane operators can hear STOP and SLOW over a headset at height. What to have ready, the steps, tool choices and common mistakes.", "url": "https://2dig.com/how-to-hear-stop-and-slow-instantly-over-a-headset-at-height-for-tower-crane-operators/", "date": "2026-10-11"} --- Tower crane operators can hear STOP and SLOW over a headset at height. What to have ready, the steps, tool choices and common mistakes. To hear STOP and SLOW over a headset at height, the crew joins one jobsite session in a phone browser, with someone sharing a link or QR code. [^1] [^1] Anyone who joins can take part in a voice call run from the phone browser, so the operator hears voice signals through a connected headset. [^1] STOP releases every held direction on every phone and shows a full-screen alert to everyone else. [^1] iPhone Safari does not buzz on alert, and an idle session is wiped after 3 hours. [^1] [^1] | Option | What it does | Fee | Card fee | |---|---|---|---| | OperatorLink | Shows STOP, HOLD and SLOW to the crew and passes button presses, chat and voice between phones in a browser [^1] | Currently free to use, no paid plan built yet [^1] | not published | | Two-way radio | not published | not published | not published | | Phone voice call app | not published | not published | not published | ## What you need before you start To hear the ground crew call STOP and SLOW over a headset at height, the operator needs a phone with a working browser, because the voice call runs through the phone browser. [^1] [^1] The person who starts the jobsite shares a link or QR code, and the rest of the crew joins from it. [^1] If everyone leaves the session and it sits empty, it is wiped after 3 idle hours, so a stopped-shift session may need to be started fresh. [^1] Decide whose phone is the one that keeps HOLD and SLOW showing, because those two signals stay on for everyone until the last person leaves the jobsite. [^1] Before the lift, add the page to the phone's home screen so it opens as a standalone app. [^1] ## Step by step 1. Check the phone has a working browser, because the voice call and button presses pass between phones in a browser. [^1] [^1] 2. Confirm the operator can use the voice call from the phone browser before climbing to the cab. [^1] 3. Have the person who starts the jobsite open the session from a phone browser, with no app install needed. [^1] 4. That person shares the link or QR code with the ground crew, and each member joins from it. [^1] 5. Confirm every crew member is in the session before the lift begins. [^1] 6. Agree on which signals stay on: HOLD and SLOW stay on for everyone in the jobsite and are cleared only when the last person leaves. [^1] 7. Anyone who joins can take part in a voice call run from the phone browser. [^1] 8. One-tap radio-style calls such as Go Ahead, Copy That and All Clear are sent as chat messages. [^1] 9. When STOP is pressed, it releases every held direction on every phone and shows a full-screen alert to everyone else. [^1] 10. A jobsite with nobody in it is wiped after 3 idle hours. [^1] ## Tools that can do it OperatorLink is made by the team that publishes this site. It shows STOP, HOLD and SLOW to the jobsite crew and passes button presses, chat and voice between phones in a phone browser. [^1] [^1] Nobody needs to install an app; the page runs in a browser. [^1] The person who starts a jobsite shares a link or QR code, and the crew joins from it. [^1] Anyone who joins can take part in a voice call run from the phone browser. [^1] A two-way radio is a second option. No facts here describe one, so check that the crew agrees on plain voice words for STOP and SLOW, that every member can be heard over machine noise, and that the channel stays clear through the lift. A phone voice call app is a third option. No facts here describe one, so check whether the call stays open for the whole shift, whether the signal person's voice stays clear over wind and cabin noise, and whether the phone locks its screen mid-lift. Match the option to the crew and the site, and keep a fallback ready for the lift. ## Common mistakes to avoid Assuming every phone alerts the same way: on Android browsers, signals such as STOP make the phone buzz, while iPhone Safari ignores the buzz, so check the sound and screen on every device. [^1] Leaving an empty session and expecting it to hold signals the next day: a jobsite with nobody in it is wiped after 3 idle hours. [^1] Forgetting that HOLD and SLOW stay on for everyone until the last person leaves. [^1] Not confirming that a move still arrives: if a move stops arriving for 2 seconds, the other phones drop it. [^1] Adding the page to the phone's home screen as a standalone app is an option. [^1] ## Frequently asked questions ### Is OperatorLink free to use? OperatorLink is currently free to use, and no paid plan is built yet. [^1] Anyone who joins can take part in a voice call run from the phone browser. [^1] ### What happens when the STOP button is pressed? STOP releases every held direction on every phone in the session and shows a full-screen alert to everyone else, so the crew sees it at once. [^1] HOLD and SLOW behave differently: they stay on for everyone until the last person leaves the jobsite. [^1] ### How long does a jobsite link stay active? A jobsite link stops working 12 hours after the first person joins it, so a link from an earlier shift may no longer open the session. [^1] A jobsite with nobody in it is wiped after 3 idle hours. [^1] ### Do STOP signals buzz on every phone? On Android browsers, signals such as STOP make the phone buzz. [^1] iPhone Safari ignores the buzz, so on an iPhone the alert may only be seen on screen. [^1] ### Can crew members talk over the phone during a lift? Anyone who joins the jobsite can take part in a voice call run from the phone browser, and one-tap radio-style calls such as Go Ahead, Copy That and All Clear are sent as chat messages. [^1] [^1] Keep a radio or hand signal as a fallback. OperatorLink is currently free to use, and no paid plan is built yet. [^1] - [Visit OperatorLink](/go/start) ## Sources [^1]: OperatorLink's own description of itself (the product of this site's publisher) (/go/start)