> For the complete documentation index, see [llms.txt](https://wiki.inels.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.inels.com/intercom/intercom-devices/door-stations/ves-b201/trouble-shooting.md).

# Trouble shooting

**The device cannot start up or power off automatically.**

* Check whether LED light isn’t powered on.
* Check whether both 12VDC power adaptor and PoE switch can’t power on?
* Change another 12VDC power adaptor or PoE switch to try again.  

 **Door station can’t make the call to indoor monitor.** 

* Make sure the Door station and Indoor monitor are in the same network segment.
* Make sure the Building no. and Unit no. are the same on Door station and Indoor monitor.
* Make sure the indoor monitor Device no. is 0 (= Main indoor monitor).

**No audio when Door station making the call to Indoor monitor..**

* Check the volume settings of both the Indoor monitor and Door station is not mute and try increasing the volume.
* Use another Door station or Indoor monitor to make the call to check whether there's audio.
* Upgrade Door station and Indoor monitor to the latest firmware.

 **The Indoor Monitor cannot monitor the Door Station.**

* Make sure another user isn’t using the system, else you can use it once he/she finishes the operation.
* Make sure the Door station and Indoor monitor are in the same network segment.
* Make sure the Building no. and Unit no. are the same of Door station and Indoor monitor.
* Click 'Search' icon in the Indoor monitor's user interface (Settings/Setup > Doors), to find the Door station and save.

 **No video when Door station making the call to Indoor monitor.** 

* Reduce the resolution of Door station to check again.
* Check whether VLC can monitor the Door station.
* Upgrade Door station and Indoor monitor to the latest firmware and try again.
* Check whether there's another NVR or VLC monitoring door station. If yes, disable it and make the video call again.
* Try to re-plug the FFC cable of the camera on Door station.

 **Indoor monitor can't receive the call but can make the outgoing call.**

* Check whether Indoor monitor enabled DND (Do Not Disturb) feature.

 **Multimedia files cannot be played normally.**

* Check whether the system supports the file format. Please refer to the multimedia setting for details.

 **The temperature of device is too high.**

* Long-term use leads to high temperature. It is normal and will not affect the device’s use life and performance.

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