--- {"title": "Coordinate two or more signal persons on a high-rise lift (2026)", "description": "Step-by-step prep, actions, tool options and common pitfalls for tower crane operators coordinating with two or more signal persons on a high-rise lift.", "url": "https://2dig.com/how-to-coordinate-with-two-or-more-signal-persons-on-a-high-rise-lift-for-tower-crane-operators/", "date": "2026-10-11"} --- Step-by-step prep, actions, tool options and common pitfalls for tower crane operators coordinating with two or more signal persons on a high-rise lift. Use a shared browser session on each signal person's phone, assign STOP, HOLD and SLOW roles, and follow the numbered steps to keep communication reliable. | Option | What it does | Fee | Card fee | |---|---|---|---| | OperatorLink | Shows STOP, HOLD and SLOW 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 | | Phone video call app | not published | not published | not published | | Two-way radio | not published | not published | not published | ## What you need before you start To coordinate two or more signal persons, each person needs a phone with a working browser, because the signals pass between phones in a browser. [^1] The person who starts the jobsite needs to share a link or QR code, and the rest of the crew joins from it. [^1] All phones should be added to the home screen so the page opens as a standalone app. [^1] Decide which signal persons will handle STOP, which will handle HOLD, and which will handle SLOW before the lift begins. Verify that the lift site has a clear line of sight for any backup hand signals in case the digital link fails. ## Step by step 1. Confirm that every signal person's phone launches a browser, because the signals pass between phones in a browser. [^1] 2. Have the person who starts the jobsite open a new session from a phone browser; no app install is needed. [^1] 3. That person shares the link or QR code with all signal persons, and each one joins from it. [^1] 4. Confirm every signal person is in the session before the lift starts, so each one sees the same signals. [^1] 5. Assign one signal person to press STOP, another to press HOLD, and a third to press SLOW, so responsibilities are clear during the lift. 6. When a signal person presses a move button, the command keeps sending to the other phones; if it stops arriving for 2 seconds, the other phones drop it, so keep the button held while checking the load. [^1] 7. When STOP is pressed, it releases every held direction on every phone and shows a full-screen alert to everyone else, so pause and look before moving again. [^1] 8. HOLD and SLOW stay on for everyone in the jobsite and are cleared when the last person leaves, so the crew must clear them on purpose after the lift. [^1] 9. Use one-tap radio-style chat messages for quick calls such as Go Ahead, Copy That and All Clear. [^1] 10. At the end of the shift, everyone leaves the session, and remember that 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] No app install is needed; the page runs directly in a browser. [^1] The person who starts a jobsite shares a link or QR code, and the crew joins from it. [^1] A phone video call app is a second option. No facts here describe one, so check whether the crew can keep the call open for the whole shift, whether each signal person's hands stay in view, and whether the phone locks its screen mid-lift. A two-way radio is a third option. No facts here describe one, so check that the crew agrees on plain voice, that every member can be heard over machine noise, and that the channel stays clear through the lift. Match the option to the crew and the site, and keep a fallback ready. ## Common mistakes to avoid Relying on one phone for the STOP signal: if that phone's data signal drops, the rest of the crew does not see it, so keep a voice or hand option ready. 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, so the crew has to clear them on purpose. [^1] Not confirming that a move still arrives: if a move stops arriving for 2 seconds, the other phones drop it. [^1] Letting the phone go to sleep mid-lift; adding the page to the home screen makes it available as a standalone app. [^1] ## Frequently asked questions ### Is OperatorLink free to use? OperatorLink is currently free to use, and no paid plan is built yet. [^1] The signal is shown through a phone browser. [^1] Check the phone setup before relying on it. ### How does STOP behave for multiple signal persons? When any signal person presses STOP, it 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. HOLD and SLOW behave differently: they stay on for everyone until the last person leaves the jobsite. ### 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] For a fresh shift, start a new session and share the new link or QR code with the crew. ### 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. Check the sound and screen settings on every phone in the crew before the lift so nobody misses the signal. ### Can signal persons talk while the lift is moving? 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] Voice runs from the phone browser, so check that the crew has another way to communicate if needed. [^1] 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)