ST/PRM3-EU | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 1 DCNW Tech SD Technology 23.Nov.06 RS232 DCN Wireless Technology DCN Wireless CCU Interpreter Desk WAP Wireless Discussion Wireless Discussion Wireless Discussion Control PC

ST/PRM3-EU | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 2 DCNW Tech SD Technology 23.Nov.06 DCN Wireless Technology  Based on WiFi technology (802.11g)  The g specification is a standard for wireless local area networks that offers transmission over relatively short distances at up to 54 megabits per second  g operate at radio frequencies between Ghz and GHz  In DCN Wireless there are 3 non overlapping carriers available.  Modulation method used is Orthogonal Frequency Division Multiplexing (OFDM) GHz GHz 012

ST/PRM3-EU | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 3 DCNW Tech SD Technology 23.Nov.06 Carriers & Channels  In the 2.4 GHz frequency range there are up to 13 channels available for wireless communication.  In DCN Wireless the following is applicable : Carrier 0 = Channel 1 Carrier 1 = Channel 6 Carrier 2 = Channel 11 GHz Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch GHz 012

ST/PRM3-EU | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 4 DCNW Tech SD Technology 23.Nov.06 Carriers & Channels  You must make sure that adjacent wireless computer networks do not use the same frequency range as the wireless network of the DCN. GHz GHz 012 Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch WLAN  In this example there is a Wireless Lan network which is using channel 3. Carriers 0 and 1 have an overlap with this channel. Therefore Carrier 2 must be used for DCN Wireless.

ST/PRM3-EU | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 5 DCNW Tech SD Technology 23.Nov.06 Carriers & Channels GHz GHz 012 Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch Ch WLAN  In this example there is a Wireless Lan network which is using channel 6. Carriers 1 is using the same channel. Therefore Carriers 0 and 2 can be used for DCN Wireless.

ST/PRM3-EU | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 6 DCNW Tech SD Technology 23.Nov.06 DCN Wireless Audio Channels  Capacity Audio uplink channels 4 Audio downlink channels2  Quality Frequency characteristics30 Hz - 20 kHz -3dB at nominal level Harmonic distortion < 0.5 %at 1kHz at -3dB of the max. input level Signal-to-noise ratio> 89 dBA at max. output level Crosstalk attenuation > 85 dB at 1kHz at max. output level Dynamic range> 85 dB I & U Instructions

ST/PRM3-EU | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 7 DCNW Tech SD Technology 23.Nov.06 DCN Wireless Technology End of section