Divisible Room Not Working After Combining?
Most divisible room faults come down to one thing: the audio and control system hasn't caught up with the wall.
Use the room's own combine or divide control rather than assuming it detects the wall, check the partition is pushed fully home, and give it a few seconds - that alone clears most cases. The fixes below cover what to do when it doesn't, including mics staying live in the wrong half.
Work top to bottom - most common causes first
1. The room hasn't noticed the wall has moved - it's still on the wrong setting
Right after opening or closing the partition, sound plays from the wrong room's speakers, microphones that should be live are dead (or the other way round), or the room simply behaves as if the wall never moved at all.
- 1Use the room's own combine or divide control - a button on the touch panel, a switch by the doorway, or a dedicated wall-state control - rather than assuming the system detects the wall automatically. Many divisible rooms have no automatic sensor at all and rely entirely on someone triggering combine or divide manually.
- 2If the room does have an automatic partition sensor, check the wall is pushed fully closed into its track at both ends. Common sensor types work on a line-of-sight infrared beam between a transmitter and receiver mounted in the ceiling either side of the track (this is how Extron's ECM S10 partition sensor works, for example) - even a small gap of a few centimetres at the end of the track can leave the beam unbroken, so the system still thinks the wall is open.
- 3Give the system a few seconds after triggering combine or divide before assuming it's failed. The audio processor switches its internal routing almost instantly, but the touch panel display and screens can take a short moment to catch up and reflect the new state.
- 4Try dividing and then recombining (or vice versa) from the control, even if the wall itself hasn't physically moved - this forces the system to re-read and reapply its own state, and often clears a one-off glitch without any further action.
- 5If that doesn't help, do a soft restart of the touch panel or room system from its own settings menu. This clears a stuck logic state and is safe to try before calling anyone.
If you've used the combine/divide control properly, confirmed the wall is fully closed, and restarted the room system, and it still won't recognise the correct state, the physical partition sensor has likely failed or drifted out of alignment, or the control programming behind it needs attention - this needs an AV engineer with access to the room's control system, not a user-side fix.
2. You can hear the room next door, or your call can hear them
After dividing the room, you can still hear the meeting in the other half through your room's speakers, or - more seriously - a microphone in the other half is still live and picking up your conversation into a call you didn't intend it to be part of.
- 1Use the combine/divide control properly and confirm on the touch panel that the system shows the room as divided, not combined - a system stuck showing 'combined' after the wall has physically closed is the direct cause of this.
- 2Check the wall is fully closed as described above; a partition sensor that hasn't triggered will leave the audio system routed as if the space is still one room.
- 3Try dividing and recombining again, then restarting the room system, exactly as in the first cause - this is the same underlying fault and the same quick checks apply.
- 4If the fault won't clear, treat it as live: don't hold a confidential or sensitive conversation in either half of the room until it's fixed, because a microphone routing fault means you cannot be certain which room is actually hearing what.
This is a mic and speaker routing fault stuck in the wrong state inside the audio processor's combine/divide logic, and self-serve steps won't reach it once a restart hasn't cleared it. Given the privacy angle, treat this as an urgent call to an AV engineer rather than something to leave until convenient - see when to call below.
3. Echo or doubled-up sound, but only when the room is combined
Audio sounds fine when each half is used separately, but as soon as the room is combined, calls develop an echo, a slight delay-and-repeat, or a hollow doubled quality that wasn't there before.
- 1If the room runs Microsoft Teams Rooms with a device in each half joining the same coordinated meeting, check that only one device's microphone is enabled for the call. Microsoft's own guidance for multi-device Teams Rooms setups is explicit: enabling the microphone on more than one device in the same combined space causes audio echo and feedback, and the fix is to leave only one device's mic live and disable the other.
- 2On the touch panel, confirm the room is fully in its combined state (not partially switched) - a system caught between presets can leave two separate echo-cancelling audio zones both active and unintentionally feeding each other.
- 3Try dividing and recombining the room once to force both zones to re-synchronise together as a single audio path.
- 4If a laptop or personal device is also connected via HDMI or a Bluetooth speaker alongside the room's own microphones, disconnect it - a second audio device with its own microphone active is a common and easily overlooked extra echo source in a combined room.
If echo persists after confirming only one microphone path is active and the room shows fully combined, this is a DSP configuration fault, not something fixable from the touch panel. The audio processor's combine logic (in systems from Biamp, QSC or similar) needs to be checked with the manufacturer's own design software and a site visit.
4. One half's screen or camera doesn't join the combined meeting
The call connects and audio works across the combined room, but the screen or camera in one half stays on its own separate view, doesn't show the meeting at all, or a second camera doesn't appear as a video source.
- 1Confirm on the touch panel that the room genuinely shows as combined, not partially switched between states.
- 2Try dividing and recombining once to force the video routing to reapply, in case it's simply stuck from before the wall was moved.
- 3Check the affected screen's own input/source hasn't separately been changed (for example, someone plugged a laptop directly into that screen) - this can look identical to a routing fault but is a much simpler fix.
- 4Restart the affected screen and its source device (room PC or codec) if the above doesn't resolve it.
If one half's screen or camera consistently fails to join once the room is combined, despite the touch panel showing combined and a restart, the video routing preset for the combined state needs reprogramming - this is design-software work, not a setting available from the panel.
5. The touch panel controls the wrong half of the room, or won't let you combine at all
Touching a control in one half of the room adjusts something in the other half instead, the panel has no combine/divide option visible, or pressing combine does nothing.
- 1Restart the touch panel from its own settings menu (not just the room's audio or video system) - this is the single most useful self-serve step for a panel that's behaving oddly.
- 2Check nothing has physically changed near the panel recently, such as furniture blocking a sensor, a wall relocation, or maintenance work, that might coincide with the fault starting.
- 3If a physical wall-state control (rather than an automatic sensor) exists elsewhere in the room, such as a switch by the doorway, try that instead in case the touch panel's own combine button specifically has failed.
- 4Try the same action from any secondary panel in the other half of the room, if one exists, to check whether the fault is limited to one specific panel.
A touch panel that consistently controls the wrong zone, or has no working combine option, points to a fault in the control system's scene or preset programming (commonly built in Crestron or a similar platform) rather than the panel hardware itself. This needs an engineer with access to that programming to fix.
6. The booking panel or calendar shows the wrong room when combined
Outside the room, the booking panel still shows two separate spaces as free or busy independently, rather than reflecting that they're currently one combined room, or a meeting booked for the combined space doesn't show correctly on either panel.
- 1Check whether the combined space actually has its own bookable calendar resource set up, separate from the two individual rooms - many divisible room booking issues come from the combined space never having been given its own entry in the room booking system in the first place.
- 2If it does have its own resource, confirm the correct one was booked, rather than one of the two individual half-rooms.
- 3Restart the affected booking panel, the same as you would any other panel that's showing stale information.
- 4If bookings are correct in the calendar but the panel display is wrong, treat this as a booking panel fault rather than a divisible-room fault specifically - our other guide on meeting room booking panels not working covers panel-side sync and display issues in more depth.
If the combined space has no dedicated bookable resource, or an automation to re-point panels to the combined room doesn't exist, this needs setting up by whoever manages your room booking system or calendar platform, alongside the AV integrator who manages the panels themselves - it's a configuration gap, not something a restart will fix.
7. Audio takes a few seconds to sort itself out after combining
For a short period right after combining or dividing, audio sounds slightly off, distant, or has a brief flutter of echo that clears on its own within several seconds without anyone doing anything.
- 1Simply wait a few seconds after combining or dividing before starting a call or judging the audio quality - this is expected behaviour, not a fault.
- 2If you're mid-call when the wall is moved, expect a brief dip in audio quality immediately afterwards while the system readjusts.
- 3Avoid combining or dividing the room while a sensitive part of a call is happening, if it can be timed for a natural pause instead.
- 4Only treat this as a genuine fault if the rough patch doesn't settle within a reasonably short window and audio stays poor for the rest of the meeting.
This is expected, not a fault: the room's echo cancellation has to re-learn the new combined or divided space's acoustics every time the wall state changes, and industry guidance on this technology is clear that convergence can genuinely take several seconds after a significant change to the room's acoustic path. If audio quality stays poor well beyond that brief settling period, treat it as one of the other faults above rather than this one.
Vendor-specific quirks worth knowing
Microsoft Teams Rooms: In a coordinated/combined setup with a Teams Rooms device in each half of the room, Microsoft's own guidance is to enable the microphone on only one device for the joined meeting - enabling it on more than one causes audio echo and feedback. If your combined room echoes on Teams specifically, check which device's mic is actually enabled before assuming a deeper DSP fault.
Biamp Tesira: The Room Combiner component uses logic inputs tied to the physical wall state: a wired partition sensor sends a signal that automatically combines or divides the audio zones and can trigger preset changes without anyone touching a control. If that logic input is wired incorrectly or the sensor has failed, the DSP can be left permanently stuck in one state regardless of where the wall actually is.
QSC Q-SYS: The Room Combiner component provides native per-room input muting and gain control, with a Wall control that opens or closes to combine or divide the rooms. The Wall control itself is a manual toggle, not a native sensor input - making it automatic means wiring an external partition sensor in via an I/O frame or GPIO plus a control script, a common integration pattern that has to be built into the design. A fault anywhere in that chain (sensor, wiring, script or the control itself) can leave microphones live or muted in the wrong half after the partition moves.
Extron: The ECM S10 partition sensor set (and similar infrared beam-break sensors from other vendors) works by a transmitter and receiver in the ceiling either side of the track sensing an unbroken beam when the wall is open. A wall that isn't fully seated in its track at the very end - even by a few centimetres - can leave the beam unbroken and the system believing the room is still open.
Crestron: Cresnet-connected partition sensors (such as the GLS-PART-CN) report the wall's open or closed state directly to the control processor, and a Crestron programmer can use that signal to drive touch panel scene changes across both halves, so a preset chosen on one panel applies to the whole combined room. If only one half's panel updates correctly, the programming logic reacting to the sensor's state is the most likely point of failure, not the sensor itself.
When to stop and call an engineer
- ·You've used the combine/divide control properly, confirmed the wall is fully closed, and restarted the room system, and the room still doesn't recognise the correct wall state - this points to a failed or misaligned partition sensor, or a control programming fault, neither of which is user-fixable.
- ·Audio or a live microphone is leaking between the two halves of the room and a restart hasn't cleared it - treat this as urgent given the privacy risk, and avoid discussing anything confidential in either half until it's resolved.
- ·Echo or doubled audio persists when combined despite confirming only one device's microphone is active and the room shows fully combined - this needs the DSP's combine configuration checked in the manufacturer's design software.
- ·A screen, camera or the touch panel consistently fails over to the wrong state or the wrong half of the room after a restart - this is a preset or scene programming fault, not a display or panel hardware issue.
- ·The combined space has never had its own bookable calendar resource set up, or bookings and panel displays never reflect the combined room correctly - this needs configuration work from whoever manages your booking system alongside your AV integrator.
- ·The fault is new since a recent change - a renovation, a moved partition track, new room booking software, or a software/firmware update - since this usually means something in the room's programming needs updating to match, which is exactly the kind of work that needs a site visit.
We support all five major vendors - Neat, HP Poly, Logitech, Yealink and Cisco - and it doesn't matter who installed the room. Tell us what you're seeing and an engineer will take it from here.