# Automatically Add Zoom Dual-Screen Code to Zoom CRC Calls **URL:** \ **Category:** Endpoint Macros\ **Created:** [August 25, 2026, 3:49pm UTC](https://community.pexip.com/t/automatically-add-zoom-dual-screen-code-to-zoom-crc-calls/1096 "2026-08-25T15:49:53Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![ssmith](https://avatars.discourse-cdn.com/v4/letter/s/958977/32.png) [@ssmith](https://community.pexip.com/u/ssmith)\ **Post date:** [August 25, 2026, 3:49pm UTC](https://community.pexip.com/t/automatically-add-zoom-dual-screen-code-to-zoom-crc-calls/1096/1 "2026-08-25T15:49:53Z")
I wanted to share a Cisco RoomOS macro **Youssef** **Aoufi** originally put together to automatically request the **Zoom dual-screen experience** when joining Zoom meetings through the Zoom CRC SIP service. The macro monitors successfully connected calls to `zoomcrc.com`. If it detects a standard Zoom SIP dial string, it disconnects the original call and immediately redials it with Zoom’s **608 dual-screen code** appended. ### Why use this? When Cisco video endpoints join Zoom meetings over SIP, adding `.608` to the Zoom dial string requests the dual-screen layout. Instead of requiring users to manually modify the SIP URI, this macro handles the process automatically. ### Supported dial-string formats The macro supports Zoom calls both with and without a meeting passcode. **Without a passcode:** `93282267874@zoomcrc.com` The macro changes this to: `93282267874.608@zoomcrc.com` **With a passcode:** `93282267874.123456@zoomcrc.com` The macro changes this to: `93282267874.123456.608@zoomcrc.com` ### Macro ```auto import xapi from 'xapi'; /* * Zoom Dual-Screen Dial String Macro * written by: Youssef Aoufi * * Purpose: * Detect successful Zoom CRC calls that use either of these formats: * * @zoomcrc.com * .@zoomcrc.com * * and automatically redial the call with Zoom code "608" appended. * * Supported Zoom meeting passcodes for SIP/H.323 room systems * are expected to contain between 6 and 10 numeric digits. * * Examples: * * Without passcode: * 93282267874@zoomcrc.com * becomes: * 93282267874.608@zoomcrc.com * * With passcode: * 93282267874.123456@zoomcrc.com * becomes: * 93282267874.123456.608@zoomcrc.com * * A URI that already contains ".608", such as: * * 93282267874.608@zoomcrc.com * * will not match the filter, preventing the macro from * repeatedly appending the Zoom dual-screen code. */ /* * Capture group 1: * Zoom Meeting ID (11–13 digits) * * Capture group 2: * Optional Zoom meeting passcode/PIN (6–10 digits) */ const zoomPattern = /^(\d{11,13})(?:\.(\d{6,10}))?@zoomcrc\.com$/; /* * Listen for a successfully connected call and inspect * the remote SIP URI. */ xapi.Event.CallSuccessful.on(event => { let remoteUri = event.RemoteURI; // Nothing to inspect if RoomOS does not provide a RemoteURI. if (!remoteUri) { console.log('⚠️ No RemoteURI found. Skipping.'); return; } // Remove the "sip:" prefix if RoomOS includes it. remoteUri = remoteUri.replace(/^sip:/, ''); // Check whether the call matches a supported Zoom CRC URI. const match = remoteUri.match(zoomPattern); if (match) { const [, meetingId, pin] = match; /* * Append the Zoom 608 dual-screen code while preserving * the meeting passcode when one is present. */ const newUri = pin ? `${meetingId}.${pin}.608@zoomcrc.com` : `${meetingId}.608@zoomcrc.com`; console.log(`🔁 Rewriting Zoom call: ${remoteUri} → ${newUri}`); // Disconnect the original call. xapi.Command.Call.Disconnect({ CallId: event.CallId }); /* * Give RoomOS a short period to begin tearing down the * original call before placing the replacement call. */ setTimeout(() => { xapi.Command.Dial({ Number: newUri }); }, 500); } else { /* * Ignore normal SIP calls, unsupported Zoom URI formats, * and Zoom calls that already contain the ".608" code. */ console.log(`✅ Call URI does not require Zoom rewrite: ${remoteUri}`); } }); ``` ### How it works 1. A user dials a Zoom CRC address normally from the Cisco endpoint. 2. RoomOS establishes the SIP call. 3. The macro listens for the `CallSuccessful` event. 4. It checks the `RemoteURI` to determine whether the call matches a supported Zoom CRC format. 5. The macro extracts the Zoom Meeting ID and optional passcode. 6. It disconnects the original call. 7. After a short 500 ms delay, it redials the meeting with `.608` appended. 8. The call remains connected using the requested Zoom dual-screen layout. ### Deployment The macro can be added through the Cisco endpoint’s **Macros** interface in the device web administration page or through Control Hub where macro management is available. After adding the code: - Save the macro. - Enable it. - Place a test Zoom CRC call. - Review the macro console logs to verify the original and rewritten SIP URI. For example: ```auto 🔁 Rewriting Zoom call: 1234567890@zoomcrc.com → 93282267874.608@zoomcrc.com ``` Once the rewritten call connects, you should see: ```auto ✅ Call URI does not require Zoom rewrite: 1234567890.608@zoomcrc.com ``` ### Notes This macro is specifically filtering calls to `zoomcrc.com`, so normal SIP calls are unaffected. You can manually update the Zoom filter to include a different Zoom domain as needed, for example, [`global.zoomcrc.com`](http://zoomcrc.com)`.` It is also worth testing the behavior on your specific Cisco RoomOS release and endpoint configuration before deploying it broadly. Hopefully this is useful for anyone looking for a simple way to automatically request Zoom dual-screen mode from Cisco RoomOS devices without requiring users to change how they normally dial Zoom meetings.