Main monitor display issuesImage from Display Cause & Solution PageLobby station R No image is displayed(blue screen).R Images have poor quality.R The cables are not correctly connected.→ Check cable connections and make surethat all cables are fully inserted into theterminals. In particular, check theconnection between the terminals (V1 andV2) of the control box and distribution box.– You can also use the Connectioncheck function (page 41) of the setuptool to check connections.R Power is not connected to all units.→ Check the power connection and connectpower to all units.R The following settings are not configured to thesame values for all lobby stations connected tothe same extension box.– Camera Display Priority– Camera Signal– Time and date settings– Monitor Time Out– Talk Time Out– Lift Signal Mode– Lift Signal Time→ Configure the same values for the settings.26 to 3253Camera No image is displayed (bluescreen).R The cable is not connected to the camera.→ Connect the cable to the camera.R Power is not connected to the camera.→ Check the power connection and connectpower to the camera.R The signal format (PAL or NTSC) used inincorrect.→ Match the signal format setting (page 43)to the signal format used by the camera.26 to 28Error messages displayed on the main monitorMessage Cause & Solution PageWhen connected to aPBX:System in useR Another call is in progress.→ Wait and try again later.R The control box is not connected properly to the PBX (telephonesystem) that controls the terminals, or the control box cannot call thePBX for some reason.→ Check the connections between the control box and the PBX, andall relevant PBX settings.2831R Cannot connectR Setup failed(displayed afterselecting to overwritea room number)R The cables are not correctly connected.→ Check cable connections and make sure that all cables are fullyinserted into the terminals.– You can also use the Connection check function (page 41) ofthe setup tool to check connections.R Power is not connected to the control box.→ Check the power connection and connect power to the control box.26 to 32637. Other Information