I88NBG318SWireless Ethernet Adapter

www.zyxel.com NBG318S Powerline Ethernet Series User’s Guide Version 3.6 4/2007 Edition 1 About This User's Guide NBG318S User’s Guide 3 About This User's Guide Intended Audience This manual is intended for people who want to configure the NBG318S using the web configurator. You should have at least a basic knowledge of TCP/IP networking concepts and topology. Related Documentation • Quick Start Guide The Quick Start Guide is designed to help you get up and running right away. It contains information on setting up your network and configuring for Internet access. • Web Configurator Online Help Embedded web help for descriptions of individual screens and supplementary information. "It is recommended you use the web configurator to configure the NBG318S. • Supporting Disk Refer to the included CD for support documents. • ZyXEL Web Site Please refer to www.zyxel.com for additional support documentation and product certifications. User Guide Feedback Help us help you. Send all User Guide-related comments, questions or suggestions for improvement to the following address, or use e-mail instead. Thank you! The Technical Writing Team, ZyXEL Communications Corp., 6 Innovation Road II, Science-Based Industrial Park, Hsinchu, 300, Taiwan. E-mail: [email protected] Document Conventions NBG318S User’s Guide 4 Document Conventions Warnings and Notes These are how warnings and notes are shown in this User’s Guide. 1Warnings tell you about things that could harm you or your device. "Notes tell you other important information (for example, other things you may need to configure or helpful tips) or recommendations. Syntax Conventions • The NBG-318S may be referred to as the “NBG318S”, the “device”, the “product” or the “system” in this User’s Guide. • Product labels, screen names, field labels and field choices are all in bold font. • A key stroke is denoted by square brackets and uppercase text, for example, [ENTER] means the “enter” or “return” key on your keyboard. • “Enter” means for you to type one or more characters and then press the [ENTER] key. “Select” or “choose” means for you to use one of the predefined choices. • A right angle bracket ( > ) within a screen name denotes a mouse click. For example, Maintenance > Log > Log Setting means you first click Maintenance in the navigation panel, then the Log sub menu and finally the Log Setting tab to get to that screen. • Units of measurement may denote the “metric” value or the “scientific” value. For example, “k” for kilo may denote “1000” or “1024”, “M” for mega may denote “1000000” or “1048576” and so on. • “e.g.,” is a shorthand for “for instance”, and “i.e.,” means “that is” or “in other words”. Document Conventions NBG318S User’s Guide 5 Icons Used in Figures Figures in this User’s Guide may use the following generic icons. The NBG318S icon is not an exact representation of your device. NBG318SComputerNotebook computer ServerDSLAMFirewall TelephoneSwitchRouter Modem Safety Warnings NBG318S User’s Guide 6 Safety Warnings 1For your safety, be sure to read and follow all warning notices and instructions. • Do NOT use this product near water, for example, in a wet basement or near a swimming pool. • Do NOT expose your device to dampness, dust or corrosive liquids. • Do NOT store things on the device. • Do NOT install, use, or service this device during a thunderstorm. There is a remote risk of electric shock from lightning. • Connect ONLY suitable accessories to the device. • Do NOT open the device or unit. Opening or removing covers can expose you to dangerous high voltage points or other risks. ONLY qualified service personnel should service or disassemble this device. Please contact your vendor for further information. • Make sure to connect the cables to the correct ports. • Place connecting cables carefully so that no one will step on them or stumble over them. • Always disconnect all cables from this device before servicing or disassembling. • Use ONLY an appropriate power adaptor or cord for your device. • Connect the power adaptor or cord to the right supply voltage (for example, 110V AC in North America or 230V AC in Europe). • Do NOT allow anything to rest on the power adaptor or cord and do NOT place the product where anyone can walk on the power adaptor or cord. • Do NOT use the device if the power adaptor or cord is damaged as it might cause electrocution. • If the power adaptor or cord is damaged, remove it from the power outlet. • Do NOT attempt to repair the power adaptor or cord. Contact your local vendor to order a new one. • Do not use the device outside, and make sure all the connections are indoors. There is a remote risk of electric shock from lightning. • Do NOT obstruct the device ventilation slots, as insufficient airflow may harm your device. • Antenna Warning! This device meets ETSI and FCC certification requirements when using the included antenna(s). Only use the included antenna(s). • If you wall mount your device, make sure that no electrical lines, gas or water pipes will be damaged. This product is recyclable. Dispose of it properly. Safety Warnings NBG318S User’s Guide 7 Safety Warnings NBG318S User’s Guide 8 Contents Overview NBG318S User’s Guide 9 Contents Overview Introduction ............................................................................................................................ 29 Getting to Know Your NBG318S ............................................................................................... 31 Wireless Tutorial ........................................................................................................................ 35 Introducing the Web Configurator ..............................................................................................43 Connection Wizard .................................................................................................................... 55 Network ..................................................................…

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Chapter 5 Wireless LAN NBG318S User’s Guide 81 Figure 46 Network > Wireless LAN > General: No Security The following table describes the labels in this screen. 5.5.2 WEP Encryption WEP encryption scrambles the data transmitted between the wireless stations and the access points to keep network communications private. It encrypts unicast and multicast communications in a network. Both the wireless stations and the access points must use the same WEP key. Your NBG318S allows you to configure up to four 64-bit or 128-bit WEP keys but only one key can be enabled at any one time. In order to configure and enable WEP encryption; click Network > Wireless LAN to display the General screen. Select Static WEP from the Security Mode list. Table 25 Wireless No Security LABELDESCRIPTION Security ModeChoose No Security from the drop-down list box. ApplyClick Apply to save your changes back to the NBG318S. ResetClick Reset to reload the previous configuration for this screen. Chapter 5 Wireless LAN NBG318S User’s Guide 82 Figure 47 Network > Wireless LAN > General: Static WEP The following table describes the wireless LAN security labels in this screen. Table 26 Network > Wireless LAN > General: Static WEP LABELDESCRIPTION PassphraseEnter a passphrase (password phrase) of up to 32 printable characters and click Generate. The NBG318S automatically generates four different WEP keys and displays them in the Key fields below. WEP Encryption Select 64-bit WEP or 128-bit WEP to enable data encryption. Authentication Method This field is activated when you select 64-bit WEP or 128-bit WEP in the WEP Encryption field. Select Auto, Open System or Shared Key from the drop-down list box. ASCIISelect this option in order to enter ASCII characters as WEP key. HexSelect this option in order to enter hexadecimal characters as a WEP key. The preceding "0x", that identifies a hexadecimal key, is entered automatically. Key 1 to Key 4The WEP keys are used to encrypt data. Both the NBG318S and the wireless stations must use the same WEP key for data transmission. If you chose 64-bit WEP, then enter any 5 ASCII characters or 10 hexadecimal characters ("0-9", "A-F"). If you chose 128-bit WEP, then enter 13 ASCII characters or 26 hexadecimal characters ("0-9", "A-F"). You must configure at least one key, only one key can be activated at any one time. The default key is key 1. ApplyClick Apply to save your changes back to the NBG318S. ResetClick Reset to reload the previous configuration for this screen. Chapter 5 Wireless LAN NBG318S User’s Guide 83 5.5.3 WPA-PSK/WPA2-PSK Click Network > Wireless LAN to display the General screen. Select WPA-PSK or WPA2- PSK from the Security Mode list. Figure 48 Network > Wireless LAN > General: WPA-PSK/WPA2-PSK The following table describes the labels in this screen. Table 27 Network > Wireless LAN > General: WPA-PSK/WPA2-PSK LABELDESCRIPTION WPA CompatibleThis check box is available only when you select WPA2-PSK or WPA2 in the Security Mode field. Select the check box to have both WPA2 and WPA wireless clients be able to communicate with the NBG318S even when the NBG318S is using WPA2-PSK or WPA2. Pre-Shared Key The encryption mechanisms used for WPA/WPA2 and WPA-PSK/WPA2-PSK are the same. The only difference between the two is that WPA-PSK/WPA2-PSK uses a simple common password, instead of user-specific credentials. Type a pre-shared key from 8 to 63 case-sensitive ASCII characters (including spaces and symbols). ReAuthentication Timer (in seconds) Specify how often wireless stations have to resend usernames and passwords in order to stay connected. Enter a time interval between 10 and 9999 seconds. The default time interval is 1800 seconds (30 minutes). Note: If wireless station authentication is done using a RADIUS server, the reauthentication timer on the RADIUS server has priority. Idle TimeoutThe NBG318S automatically disconnects a wireless station from the wired network after a period of inactivity. The wireless station needs to enter the username and password again before access to the wired network is allowed. The default time interval is 3600 seconds (or 1 hour). Chapter 5 Wireless LAN NBG318S User’s Guide 84 5.5.4 WPA/WPA2 Click Network > Wireless LAN to display the General screen. Select WPA or WPA2 from the Security Mode list. Figure 49 Network > Wireless LAN > General: WPA/WPA2 Group Key Update Timer The Group Key Update Timer is the rate at which the AP (if using WPA-PSK/ WPA2-PSK key management) or RADIUS server (if using WPA/WPA2 key management) sends a new group key out to all clients. The re-keying process is the WPA/WPA2 equivalent of automatically changing the WEP key for an AP and all stations in a WLAN on a periodic basis. Setting of the Group Key Update Timer is also supported in WPA-PSK/WPA2-PSK mode. The default is 1800 seconds (30 minutes). ApplyClick Apply to save your changes back to the NBG318S. ResetClick Reset to reload the previous configuration for this screen. Table 27 Network > Wireless LAN > General: WPA-PSK/WPA2-PSK LABELDESCRIPTION Chapter 5 Wireless LAN NBG318S User’s Guide 85 The following table describes the labels in this screen. Table 28 Network > Wireless LAN > General: WPA/WPA2 LABELDESCRIPTION WPA CompatibleThis check box is available only when you select WPA2-PSK or WPA2 in the Security Mode field. Select the check box to have both WPA2 and WPA wireless clients be able to communicate with the NBG318S even when the NBG318S is using WPA2-PSK or WPA2. ReAuthentication Timer (in seconds) Specify how often wireless stations have to resend usernames and passwords in order to stay connected. Enter a time interval between 10 and 9999 seconds. The default time interval is 1800 seconds (30 minutes). Note: If wireless station authentication is done using a RADIUS server, the reauthentication timer on the RADIUS server has priority. Idle TimeoutThe NBG318S automatically disconnects a wireless station from the wired network after a period of inactivity. …

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Chapter 15 Bandwidth Management NBG318S User’s Guide 161 Figure 88 Management > Bandwidth MGMT > Advanced: Rule Configuration The following table describes the labels in this screen. 15.9.2 Rule Configuration with the User-defined Service In addition to the pre-defined services, if you want to edit a bandwidth management rule for other applications and/or subnets, click the Edit icon in the User-defined Service table of the Advanced screen. The following screen displays. Table 62 Management > Bandwidth MGMT > Advanced: Application Rule Configuration LABELDESCRIPTION #This is the number of an individual bandwidth management rule. EnableSelect an interface’s check box to enable bandwidth management on that interface. Direction These read-only labels represent the physical interfaces. Bandwidth management applies to all traffic flowing out of the router through the interface, regardless of the traffic’s source. Traffic redirect or IP alias may cause LAN-to-LAN traffic to pass through the NBG318S and be managed by bandwidth management. BandwidthSelect Maximum Bandwidth or Minimum Bandwidth and specify the maximum or minimum bandwidth allowed for the rule in kilobits per second. Destination PortThis is the port number of the destination. See Table 58 on page 156 for some common services and port numbers. Source PortThis is the port number of the source. See Table 58 on page 156 for some common services and port numbers. ProtocolThis is the protocol (TCP or UDP) used for the service. OKClick OK to save your customized settings. CancelClick Cancel to exit this screen without saving. Chapter 15 Bandwidth Management NBG318S User’s Guide 162 Figure 89 Management > Bandwidth MGMT > Advanced: User-defined Service Rule Configuration The following table describes the labels in this screen Table 63 Management > Bandwidth MGMT > Advanced: User-defined Service Rule Configuration 15.10 Bandwidth Management Monitor Click Management > Bandwidth MGMT > Monitor to open the bandwidth management Monitor screen. View the bandwidth usage of the WAN configured bandwidth rules. This is also shown as bandwidth usage over the bandwidth budget for each rule. The gray section of the bar represents the percentage of unused bandwidth and the blue color represents the percentage of bandwidth in use. LABELDESCRIPTION BW BudgetSelect Maximum Bandwidth or Minimum Bandwidth and specify the maximum or minimum bandwidth allowed for the rule in kilobits per second. Destination Address Enter the destination IP address in dotted decimal notation. Destination Subnet Netmask Enter the destination subnet mask. This field is N/A if you do not specify a Destination Address. Refer to the appendices for more information on IP subnetting. Destination PortEnter the port number of the destination. See Table 58 on page 156 for some common services and port numbers. Source AddressEnter the source IP address in dotted decimal notation. Source Subnet Netmask Enter the destination subnet mask. This field is N/A if you do not specify a Source Address. Refer to the appendices for more information on IP subnetting. Source PortEnter the port number of the source. See Table 58 on page 156 for some common services and port numbers. ProtocolSelect the protocol (TCP or UDP) or select User defined and enter the protocol (service type) number. OKClick OK to save your customized settings. CancelClick Cancel to exit this screen without saving. Chapter 15 Bandwidth Management NBG318S User’s Guide 163 Figure 90 Management > Bandwidth MGMT > Monitor Chapter 15 Bandwidth Management NBG318S User’s Guide 164 NBG318S User’s Guide 165 CHAPTER 16 Remote Management This chapter provides information on the Remote Management screens. 16.1 Remote Management Overview Remote management allows you to determine which services/protocols can access which NBG318S interface (if any) from which computers. "When you configure remote management to allow management from the WAN, you still need to configure a firewall rule to allow access. See the firewall chapters for details on configuring firewall rules. You may manage your NBG318S from a remote location via: "When you choose WAN or LAN & WAN, you still need to configure a firewall rule to allow access. To disable remote management of a service, select Disable in the corresponding Server Access field. You may only have one remote management session running at a time. The NBG318S automatically disconnects a remote management session of lower priority when another remote management session of higher priority starts. The priorities for the different types of remote management sessions are as follows. 1Telnet 2HTTP 16.1.1 Remote Management Limitations Remote management over LAN or WAN will not work when: •Internet (WAN only)•ALL (LAN and WAN) •LAN only•Neither (Disable). Chapter 16 Remote Management NBG318S User’s Guide 166 1You have disabled that service in one of the remote management screens. 2The IP address in the Secured Client IP Address field does not match the client IP address. If it does not match, the NBG318S will disconnect the session immediately. 3There is already another remote management session with an equal or higher priority running. You may only have one remote management session running at one time. 4There is a firewall rule that blocks it. 16.1.2 Remote Management and NAT When NAT is enabled: • Use the NBG318S’s WAN IP address when configuring from the WAN. • Use the NBG318S’s LAN IP address when configuring from the LAN. 16.1.3 System Timeout There is a default system management idle timeout of five minutes (three hundred seconds). The NBG318S automatically logs you out if the management session remains idle for longer than this timeout period. The management session does not time out when a statistics screen is polling. You can change the timeout period in the System screen 16.2 WWW Screen To change your NBG318S’s World Wide Web settings, click Management > Remote MGMT to display the WWW screen. Figure 91 Mana…

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Appendix B Pop-up Windows, JavaScripts and Java Permissions NBG318S User’s Guide 231 Figure 132 Internet Options: Privacy 3Type the IP address of your device (the web page that you do not want to have blocked) with the prefix “http://”. For example, http://192.168.167.1. 4Click Add to move the IP address to the list of Allowed sites. Figure 133 Pop-up Blocker Settings Appendix B Pop-up Windows, JavaScripts and Java Permissions NBG318S User’s Guide 232 5Click Close to return to the Privacy screen. 6Click Apply to save this setting. JavaScripts If pages of the web configurator do not display properly in Internet Explorer, check that JavaScripts are allowed. 1In Internet Explorer, click Tools, Internet Options and then the Security tab. Figure 134 Internet Options: Security 2Click the Custom Level... button. 3Scroll down to Scripting. 4Under Active scripting make sure that Enable is selected (the default). 5Under Scripting of Java applets make sure that Enable is selected (the default). 6Click OK to close the window. Appendix B Pop-up Windows, JavaScripts and Java Permissions NBG318S User’s Guide 233 Figure 135 Security Settings - Java Scripting Java Permissions 1From Internet Explorer, click Tools, Internet Options and then the Security tab. 2Click the Custom Level... button. 3Scroll down to Microsoft VM. 4Under Java permissions make sure that a safety level is selected. 5Click OK to close the window. Figure 136 Security Settings - Java Appendix B Pop-up Windows, JavaScripts and Java Permissions NBG318S User’s Guide 234 JAVA (Sun) 1From Internet Explorer, click Tools, Internet Options and then the Advanced tab. 2Make sure that Use Java 2 for <applet> under Java (Sun) is selected. 3Click OK to close the window. Figure 137 Java (Sun) NBG318S User’s Guide 235 APPENDIX C IP Addresses and Subnetting This appendix introduces IP addresses and subnet masks. IP addresses identify individual devices on a network. Every networking device (including computers, servers, routers, printers, etc.) needs an IP address to communicate across the network. These networking devices are also known as hosts. Subnet masks determine the maximum number of possible hosts on a network. You can also use subnet masks to divide one network into multiple sub-networks. Introduction to IP Addresses One part of the IP address is the network number, and the other part is the host ID. In the same way that houses on a street share a common street name, the hosts on a network share a common network number. Similarly, as each house has its own house number, each host on the network has its own unique identifying number - the host ID. Routers use the network number to send packets to the correct network, while the host ID determines to which host on the network the packets are delivered. Structure An IP address is made up of four parts, written in dotted decimal notation (for example, 192.168.1.1). Each of these four parts is known as an octet. An octet is an eight-digit binary number (for example 11000000, which is 192 in decimal notation). Therefore, each octet has a possible range of 00000000 to 11111111 in binary, or 0 to 255 in decimal. The following figure shows an example IP address in which the first three octets (192.168.1) are the network number, and the fourth octet (16) is the host ID. Appendix C IP Addresses and Subnetting NBG318S User’s Guide 236 Figure 138 Network Number and Host ID How much of the IP address is the network number and how much is the host ID varies according to the subnet mask. Subnet Masks A subnet mask is used to determine which bits are part of the network number, and which bits are part of the host ID (using a logical AND operation). The term “subnet” is short for “sub- network”. A subnet mask has 32 bits. If a bit in the subnet mask is a “1” then the corresponding bit in the IP address is part of the network number. If a bit in the subnet mask is “0” then the corresponding bit in the IP address is part of the host ID. The following example shows a subnet mask identifying the network number (in bold text) and host ID of an IP address (192.168.1.2 in decimal). By convention, subnet masks always consist of a continuous sequence of ones beginning from the leftmost bit of the mask, followed by a continuous sequence of zeros, for a total number of 32 bits. Subnet masks can be referred to by the size of the network number part (the bits with a “1” value). For example, an “8-bit mask” means that the first 8 bits of the mask are ones and the remaining 24 bits are zeroes. Table 98 Subnet Mask - Identifying Network Number 1ST OCTET: (192) 2ND OCTET: (168) 3RD OCTET: (1) 4TH OCTET (2) IP Address (Binary)11000000101010000000000100000010 Subnet Mask (Binary)11111111111111111111111100000000 Network Number110000001010100000000001 Host ID00000010 Appendix C IP Addresses and Subnetting NBG318S User’s Guide 237 Subnet masks are expressed in dotted decimal notation just like IP addresses. The following examples show the binary and decimal notation for 8-bit, 16-bit, 24-bit and 29-bit subnet masks. Network Size The size of the network number determines the maximum number of possible hosts you can have on your network. The larger the number of network number bits, the smaller the number of remaining host ID bits. An IP address with host IDs of all zeros is the IP address of the network (192.168.1.0 with a 24-bit subnet mask, for example). An IP address with host IDs of all ones is the broadcast address for that network (192.168.1.255 with a 24-bit subnet mask, for example). As these two IP addresses cannot be used for individual hosts, calculate the maximum number of possible hosts in a network as follows: Notation Since the mask is always a continuous number of ones beginning from the left, followed by a continuous number of zeros for the remainder of the 32 bit mask, you can simply specify the number of ones instead of writing the value of each octet. This is usually specified by writing a “/” followed by the numb…

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APPENDIX A Lettery of Agency "I, an officer of ZyXEL Communications Corporation do hereby authorize Intertek Testing Services to act on our behalf in front of the Federal Communications Commission with respect to all matters relating to certification of equipment under Part 15 and Part 18 of the FCC Rules until further notice." I further certify that no party (as defined in §1.2002(b) of CFR 47, 1992) to this application, including myself, is subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.,853(a). By Wang Yi Signature Printed Title Section Manager

Photo 1: External photo of EUT NBG-318S Photo 2: External photo of EUT NBG-318S Photo 3: External photo of EUT NBG-318S

FCC ID Label Location

Photo 1: Internal photo of EUT NBG-318S Photo 2: Internal photo of EUT NBG-318S Photo 3: Internal photo of EUT NBG-318S Photo 4: Internal photo of EUT NBG-318S Photo 5: Internal photo of EUT NBG-318S Photo 6: Internal photo of EUT NBG-318S Photo 7: Internal photo of EUT NBG-318S Photo 8: Internal photo of EUT NBG-318S Photo 9: Internal photo of EUT NBG-318S Photo 10: Internal photo of EUT NBG-318S Photo 11: Internal photo of EUT Antenna NBG-318S Photo 12: Internal photo of EUT Antenna NBG-318S

FCC ID. : I88NBG318S Report No.: EME-070405 Page 1 of 6 Maximum Permissible Exposure (MPE) Evaluation Report Report No. : EME-070405 Model No. :NBG-318S, NBG318S, PLA-450, PLA450, PLA-470, PLA470, 401666 Issued Date : Jun. 22, 2007 Applicant : ZyXEL Communications Corporation No. 6, Innovation Rd II, Science-Based Industrial Park, Hsin-Chu, Taiwan Test By : Intertek Testing Services Taiwan Ltd. No. 11, Lane 275, Ko-Nan 1 Street, Chia-Tung Li, Shiang-Shan District, Hsinchu City, Taiwan This test report consists of 6 pages in total. It may be duplicated completely for legal use with the allowance of the applicant. It shall not be reproduced except in full, without the written approval of Intertek Laboratory. The test result(s) in this report only applies to the tested sample(s). Rico Deng Project Engineer Reviewed By Kevin Chen FCC ID. : I88NBG318S Report No.: EME-070405 Page 2 of 6 Table of Contents Summary of Tests ............................................................................................................. 3 1. Introduction .................................................................................................................. 4 2. RF Exposure Limit ....................................................................................................... 4 3. RF Exposure calculations ............................................................................................. 5 4. Test results .................................................................................................................... 5 FCC ID. : I88NBG318S Report No.: EME-070405 Page 3 of 6 Summary of Tests MPE Evaluation meet FCC OET No. 65: 1997/ IEEE C95.1-1999 802.11g Wireless Firewall Router -Model: NBG-318S FCC ID: I88NBG318S Test Reference Results MPE Evaluation FCC Guidelines for Human Exposure IEEE C95.1 Pass FCC ID. : I88NBG318S Report No.: EME-070405 Page 4 of 6 1. Introduction The EUT operates in the 2.4GHz ISM band. Due to the EUT (include antenna) at its normal operation distance is at least 20 cm from the human body, the EUT was defined as a Mobile Device. The EUT operates in the 2.4GHz ISM band. The EUT (antenna included) is compliant with modular approval and the normal operation distance (after installing in other device, such as router or access point), 20cm from the human body; therefore, the EUT is defined as a Mobile Device. The reason to do the MPE Evaluation is to avoid the RF hazard to human body. The maximum output power and gain of the antenna were used to calculate the limited Power density (S) at 20cm distance away from the product. The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is followed. 2. RF Exposure Limit According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in 1.1307(b). Limits for Maximum Permissible Exposure (MPE) Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Average Time (minutes) (A) Limits for Occupational / Control Exposures 30-300 61.4 0.163 1.0 6 300-1500 - - F/300 6 1500-100,000 - - 5 6 (B) Limits for General Population / Uncontrolled Exposure 30-300 27.5 0.073 0.2 30 300-1500 - - F/1500 30 1500-100,000 - - 1.0 30 F= Frequency in MHz FCC ID. : I88NBG318S Report No.: EME-070405 Page 5 of 6 3. RF Exposure calculations From FCC 1.1310 table 1, the maximum permissible RF exposure for an uncontrolled environment is 1mW/(cm 2 ) Power density (S) is calculated by the following formula: S = (P * G)/4πR 2 where, S = Power density (mW/cm 2 ) P = Output power to antenna (mW) R = Distance between radiating structure and observation point (cm) G = Gain of antenna in numeric π = 3.1416 Example: Assume a mobile device operates at 2412MHz and its maximum output power is 50mW, and the maximum gain of antenna is 1 (numeric) /0dBi. then the power density (S) = (50 * 1)/4*π*20 2 = 0.00995 (mW/cm 2 ) 4. Test results Test Mode: 802.11b mode Channel Channel Frequency (MHz) Maximum antenna gain (numeric) Output power to antenna (mW) Power density (mW/cm 2 ) Limit of power density (mW/cm 2 ) 1 2412 1.51 94.41 0.028426942 1.0 6 2437 1.51 107.89 0.032488536 1.0 11 2462 1.51 92.26 0.027779866 1.0 Test Mode: 802.11g mode Channel Channel Frequency (MHz) Maximum antenna gain (numeric) Output power to antenna (mW) Power density (mW/cm 2 ) Limit of power density (mW/cm 2 ) 1 2412 1.51 139.32 0.041949824 1.0 6 2437 1.51 242.10 0.072900439 1.0 11 2462 1.51 130.02 0.039149854 1.0 FCC ID. : I88NBG318S Report No.: EME-070405 Page 6 of 6 Test Mode: 802.11g turbo mode Channel Channel Frequency (MHz) Maximum anten…

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