22 en | Troubleshooting DCN-D Conference Delegate UnitsF.01U.265.631 | V1.0 | 2012.03 Installation and Operation manual Bosch Security Systems B.V.9 Troubleshooting9.1 Delegate UnitProblem Possible cause– Not possible to initialize delegate Units. – The DCN signal is re-generated toomany times.– The trunk is too long.– The DCN signal is not re-generatedeach 100 m.Refer to the Section 4 Planning and designand Section 7 Configuration.– Depending on menu setting 8L (CCU), attwo or more delegate units the microphoneindicator ring is flashing or continues red.The LEDs of the microphone buttons areoff.Units have the same address. Make surethat each active device in the DCN systemhas a unique address.Refer to Section 4 Planning and design andSection 7 Configuration.– Delegate unit fully operational but no audioto the loudspeaker or headphones.The audio routing mode of the centralcontrol unit is Insertion and you did notconnect a device between audio input 2and audio output 2 of the central controlunitRefer to the CCU sections of the DCNsystem installation and operating manual.– Although the system powers the trunks,delegate units are not operational.The DCN contains a defective (extension)cable. Find the defective (extension) cableand replace it. The defective (extension)cable can be anywhere in the DCN system.– A delegate unit does not operate asexpected.The delegate unit is not in the correctmode.Refer to Section 7.4 Delegate unit modes.