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\deftab708\paperw15309\paperh16840\margl1134\margt1134\margr3430\margb1338\pard\sb100\plain\f0\fs18 The SCALANCE W-700 products support the following functions of an IWLAN wireless connection:\par\pard\fi-284\li284\sb60\tx284\plain\f1\fs18 \'b7\plain\f0\fs18\tab Storage of the data rate (extension of the standards IEEE 802.11b/g and IEEE 802.11a) for selected stations for determining access to the radio medium and for specifying maximum transmission times\par\plain\f1\fs18 \'b7\plain\f0\fs18\tab Cyclic monitoring of wireless link between Access Point and node for fast recognition of fault states\par\plain\f1\fs18 \'b7\plain\f0\fs18\tab Redundancy mechanisms for reliable wireless infrastructure\par\plain\f1\fs18 \'b7\plain\f0\fs18\tab Antenna diversity for very good reception in difficult areas for radio signals \par\plain\f1\fs18 \'b7\plain\f0\fs18\tab Optional use of separate antennas for customer-specific requirements\par\plain\f1\fs18 \'b7\plain\f0\fs18\tab Automatic switching back to lower data rates if quality of connection is reduced\par\pard\sb100 With the SCALANCE W products a wireless network with approval in more than 30 countires is set up in the license-free ISM bands at 2.4\~GHz or 5\~GHz. This radio network permits very reliable radio connections via IWLAN with up to 54 Mbit/s.\par SCALANCE W is upgradable to the IEEE\~802.11h standard which includes the stringent ETSI requirements of the European countries.\par\plain\f0\fs18\b Security\plain\f0\fs18\par A high degree of data security is achieved by means of the modern mechanisms of Wi-Fi Protected Access (WPA). These define modern procedures that control a regular exchange of the complete 128-bit code, but also perform the user authentication of a node. The Advanced Encryption Standard (AES) is available for data encryption. All encryption mechanisms are already integrated in the products and do not incur any additional costs. If despite this a security concept, for example with Virtual Private Networks (VPN) is required, the products can be integrated without any difficulty.\par\plain\f0\fs18\b Product variants \plain\f0\fs18\par\pard\sb60\sa20\plain\f0\fs18\b\cf3 SCALANCE W788-1PRO\par\pard\sb100\plain\f0\fs18\ul Infrastructure mode\plain\f0\fs18\par A wireless network can consist of just a single access point or a number of points, so that wide area networks can be set up in buildings. In these wide area networks the users move seamless with automatic handover from one access point to the next (roaming). This happens transparently for the application. \par The Access Point provides an Industrial Ethernet interface for connection to the wireline network. Users, such as mobile controllers, the Internet Pad MOBIC or Field PG can move freely within the radio cells and exchange data with other users. The Wi-Fi Compliance confirms the interaction with the products of other suppliers.\par\plain\f0\fs18\ul Point-to-point operation\plain\f0\fs18\par In this operating mode two Ethernet segments are coupled by means of a radio link, if it is difficult to install cables (e.g. across public roads). SCALANCE W788-1PRO can operate as many as eight point-to-point connections. This enables redundant networks to be implemented with a high level of reliability (together with Spanning Tree). By replacing the two antennas (included in scope of supply) with optional, directional antennas (observing the minimum distance necessary between the antennas) ranges of several hundred meters are achieved in the open.\par\pard\plain\f0\fs16\par\pard\sb20\sa20\plain\f0\fs18 {\field{\*\fldinst INCLUDEPICTURE "G_IK10_en_30016.JPG"}{\fldrslt {}}}\par\pard\sb60\sa20\plain\f0\fs18\b\cf3 SCALANCE W788-2PRO\par\pard\sb100\plain\f0\fs18 In the Dual Access Point SCALANCE W788-2PRO, two access points are integrated in one housing. This enables a variety of applications to be implemented economically. \par\plain\f0\fs18\ul Point-to-point operation\plain\f0\fs18  \par If for example, a plant is to be commissioned quickly, a communications infrastructure can be set up using several point-to-point connections between the dual access points (wireless backbone). At the respective dual access point, a complete communication segment can be connected to the Industrial Ethernet interface.\par In an alternative application, the two wireless interfaces are operated in point-to-point mode for each SCALANCE W788-2PRO so that a redundant wireless network is created (implementation of redundant paths with spanning tree). If a fault occurs on one connection, the wireless network automatically finds a redundant path. This guarantees a high level of operational security.\par\pard\plain\f0\fs16\par\pard\sb20\sa20\plain\f0\fs18 {\field{\*\fldinst INCLUDEPICTURE "G_IK10_en_30030.JPG"}{\fldrslt {}}}\par\pard\sb100\plain\f0\fs18\ul "Redundancy mode"\plain\f0\fs18\par In this operating mode, two Industrial Ethernet segments are coupled and the data stream is transmitted in parallel by the two wireless cards. If , for example, the frequency band at 2.4\~GHz is chosen for one wireless card and 5\~GHz for the other, a radio link with maximum reliability is implemented.\par Existing wireless networks that have been set up using the Radio Link Module (RLM) can easily be expanded with SCALANCE W788-1PRO and SCALANCE W788-2PRO.\par\pard\plain\f0\fs16\par\pard\sb20\sa20\plain\f0\fs18 {\field{\*\fldinst INCLUDEPICTURE "G_IK10_en_30022.JPG"}{\fldrslt {}}}\par\pard\sb60\sa20\plain\f0\fs18\b\cf3 SCALANCE W744-1PRO\par\pard\sb100\plain\f0\fs18 The Ethernet client module SCALANCE W744-1PRO established the radio link of just one mobile device with an Ethernet interface to the wireless network. SCALANCE W744-1PRO and SCALANCE W788-1PRO have identical structures and interfaces, but differ in their function: SCALANCE W788-1PRO implements the wireless network in which SCALANCE W744-1PRO can move freely. The Ethernet Client Module is handed over automatically and transparently for the application from one Access Point to the next (roaming).\par\plain\f0\fs18\ul Ad-hoc mode\plain\f0\fs18\par This is the simplest radio link between no more than two mobile devices. It enables a SCALANCE W744-1PRO to communicate with another SCALANCE W744-1PRO or with a wireless card (e.g. CP\~7515). \par\pard\plain\f0\fs16\par\pard\sb20\sa20\plain\f0\fs18 {\field{\*\fldinst INCLUDEPICTURE "G_IK10_en_30021.JPG"}{\fldrslt {}}}\par\pard\sb100\par\trowd\trgaph70\trleft0\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx2765\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx4622\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx6479\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx8336\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx10193\pard\widctlpar\intbl\pard\intbl\plain\f2\fs24\cell\pard\intbl\sb60\sa60\plain\f0\fs14\b\cf3 Operating mode\cell Wireless interfaces\cell Wireless standard\cell Degree of protection\cell\intbl\row\pard\trowd\trgaph70\trleft0\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx2765\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx4622\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx6479\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx8336\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx10193\pard\widctlpar\intbl\pard\intbl\sb60\sa60\plain\f0\fs14 SCALANCE W788-1PRO\cell Access Point\cell 1 (infrastructure)\cell 802.11b/g and a\cell IP65\cell\intbl\row\pard\trowd\trgaph70\trleft0\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx2765\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx4622\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx6479\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx8336\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx10193\pard\widctlpar\intbl\pard\intbl\sb60\sa60 SCALANCE W788-2PRO\cell Dual Access Point\cell 2 (infrastructure)\cell 802.11b/g and a\cell IP65\cell\intbl\row\pard\trowd\trgaph70\trleft0\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx2765\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx4622\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx6479\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx8336\clbrdrl\brdrs\brdrw5\clbrdrt\brdrs\brdrw5\clbrdrr\brdrs\brdrw5\clbrdrb\brdrs\brdrw5\cellx10193\pard\widctlpar\intbl\pard\intbl\sb60\sa60 SCALANCE W744-1PRO\cell Ethernet Client Module\cell 1 (user)\cell 802.11b/g and a\cell IP65\cell\intbl\row\pard\pard\sb100\plain\f0\fs18\b Diagnosis and management\plain\f0\fs18\par\pard\fi-284\li284\sb60\tx284\plain\f1\fs18 \'b7\plain\f0\fs18\tab Web-based (HTTP Server) management tool for configuration and diagnosis using a standard browser\par\plain\f1\fs18 \'b7\plain\f0\fs18\tab LEDs for signaling operating and fault states\par\plain\f1\fs18 \'b7\plain\f0\fs18\tab Signaling of faults by means of SNMP trap or e-mail to a network management tool\par\plain\f1\fs18 \'b7\plain\f0\fs18\tab Bolt-on shaft on the rear panel of the device for the optional replacement medium C-PLUG (configuration plug) for simple replacement of the module without a programming device in the event of failure\par\pard\par }