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                 DH-PFM881 User Manual            All Right Reserved 

Page 39 

Ping Watchdog

：

The ping watchdog sets the DH-PFM881 Device to continuously 

ping a user-defined IP address (for example, it can be the IP address of the AP the 

Client is connecting to). If it is unable to ping under the user defined constraints, 

the DH-PFM881 device will automatically reboot. It is highly recommended that 

users enable this feature at the side of “Station” and disable this feature at the side 

of “Access Point”. 

Ping Interval

：

 Specify time interval (in seconds) between the ping requests are 

sent by the Ping Watchdog. 

Ping IP Address

：

Specify an IP address of the target which will be monitored by 

Ping Watchdog. If this feature is enabled at the side of “Station”, Ping IP Address 

should be the IP address of the AP the Client is connecting to. 

Startup Delay: specify initial time delay (in seconds) until first ping request is sent 

by the Ping Watchdog. 

Ping Failure

：

Specify the number of ping replies. If the specified number of ping 

replies is not received continuously, the Ping Watchdog will reboot the device. 

Note

：

If users want to modify the parameters of Ping Watchdog, please 

disable it first and then apply. When the web page shows that Ping 

Watchdog is really disabled, users can now re-enable it with modified 

parameters.  

Telnet/Syslog

：

When telnet is enabled, the user can input command “Telnet 

192.168.1.36” in the DOS window of Windows XP or Windows 7 PC, and then 
telnet to the DH-PFM881 and manipulate the DH-PFM881 device. When telnet is 
disabled, this operation is disabled.

   

When Syslog is enabled, and the System Log server’s IP is also set here, the log 
information will be output to the Syslog server automatically.   

Содержание DH-PFM881

Страница 1: ...DH PFM881 User Manual All Right Reserved 5 8GHz Wireless Bridge CPE AP Model DH PFM881 User Manual Version V1 0 1563...

Страница 2: ...eatures 9 1 5 Using Example 10 1 6 Applications 11 1 7 Hardware Overview 12 1 8 Understand the DH PFM881 LEDs 12 2 Installation 13 2 1 Connections and installation 13 2 2 Restore to the Factory Settin...

Страница 3: ...URE 1 DH PFM881 USING EXAMPLES 11 FIGURE 2 DH PFM881 LEDS 13 FIGURE 3 CONNECTIONS AT BRIDGE MODE 14 FIGURE 4 RESTORE TO THE FACTORY SETTINGS 15 FIGURE 5 LOCAL AREA CONNECTION PROPERTIES 16 FIGURE 6 IP...

Страница 4: ...TTING 34 FIGURE 27 VLAN SCENARIOS 34 FIGURE 28 ADVANCED 35 FIGURE 29 SYSTEM PAGE 36 FIGURE 30 TOOLS 38 FIGURE 31 AC MANAGEMENT 40 FIGURE 32 AP AND STATION NETWORK 41 FIGURE 33 WDS NETWORK 42 FIGURE 34...

Страница 5: ...following parts hardware information web configuration menu descriptions network configuration examples and troubleshooting It can help the customers quickly be familiar with the devices and use them...

Страница 6: ...robust transmission 3 AP Access Point 4 Station Client WIFI station that can be associated to an access point 5 CPE Customer premises equipment it is any terminal and associated equipment located at...

Страница 7: ...stances of the DH PFM881 devices and thus adjust the wireless parameters to achieve the best wireless link quality The best transmission range and max speed of DH PFM881 can be as high as 15Km and 300...

Страница 8: ...dard channels availability Currently most of the WIFI devices are working at standard 802 11 5 8GHz frequency However standard 802 11 5 8GHz only provide limited channels and there is serious interfer...

Страница 9: ...3 6 5Mbps 20MHz Channel Width 11a 54 48 36 24 18 12 9 6Mbps adaptive Distance Outdoor open area 15 km H A R D W A R E Power supply 24V POE Interface POE LED WIFI Status LAN Power Signal strength Opera...

Страница 10: ...rew Set 1 4 Features y High performance 802 11n 2 2 MIMO chip y Best transmission range 15Km and max transmission throughput 300Mbps y Integrated XTrans technology including TDMA intelligent rate cont...

Страница 11: ...tting much easier y Reliable POE power supply support 802 3af standard y Web based configuration easy to use y Waterproof housing and accessory kit protects 1 5 Using Example The DH PFM881 usage examp...

Страница 12: ...DH PFM881 User Manual All Right Reserved Page 11 Figure 1 DH PFM881 using examples 1 6 Applications DH PFM881 can be used widely in the following applications...

Страница 13: ...the following Table 4 Table 4 Hardware information Hardware Specifications CPU Baseband Radio Atheros AR9344 Memory 64MB DRAM 8MB Flash Physical Interface 2 10 100M Base TX Cat 5 5E RJ 45 Ports LED S...

Страница 14: ...ice radio is ON and sending or receiving date through the wireless LAN Link Quality Red Showing the signal strength between the device and the network Green is ON good quality Yellow is ON medium qual...

Страница 15: ...Remove the bottom cover from the DH PFM881 device and you will see there are 2 RJ45 ports marked with POE and LAN2 2 Using an Ethernet cable to connect the POE power adaptor and the POE port of the DH...

Страница 16: ...e DH PFM881 s RJ45 ports will be connected and disconnected twice Figure 4 Restore to the factory settings For default all the factory settings are shown in the following Table 6 Table 6 Main paramete...

Страница 17: ...er first as the following steps 1 Right click Local Area Connection icon of your computer and click properties then click Continue the Local Area Connection Properties dialog box appears as Figure 5 F...

Страница 18: ...PFM881 default IP address is 192 168 1 36 4 When the above IP setting is done input the default IP 192 168 1 36 into the address bar of your web browser and the following log in interface appears as...

Страница 19: ...ther information of the DH PFM881 device User can switch to other pages by clicking the left main menus in Figure 8 Figure 8 Status Page 2 Click Wizard main menu the users can configure the device qui...

Страница 20: ...is the Access Point and the Station Station mode The device acts as a WIFI station and it can be connected to a normal home access point or DH PFM881 access point Access Point mode The DH PFM881 devi...

Страница 21: ...of Wizard 4 TDMA Currently most of the outdoor bridge products are developed based on 802 11 protocols however it has the limitations of short distance hidden node problems and poor point to multi poi...

Страница 22: ...12 Figure 12 TDMA setting To use the TDMA the user needs to enable TDMA mode in the AP device and set a priority level in the station device When several stations are connected to one AP different sta...

Страница 23: ...Channel Wireless channel chosen Firmware Version Software version number Channel Width 5MHz 10MHz 20MHz 40 MHz 40 MHz Network Mode Network mode Router or Bridge Wireless Mode Access Point Station WDS...

Страница 24: ...ss link shown in the following Figure 14 Figure 14 Throughput monitor Route Table It is stored in a router that lists the routes to particular network destinations and in some cases metrics distances...

Страница 25: ...able AP Station Information Showing the status information of the associated devices For example if the DH PFM881 device is an AP and the associated device is a Station and this Station Information sh...

Страница 26: ...the log information of DH PFM881 6 Wireless Wireless is shown in Figure 20 Figure 20 Wireless Wireless Mode There are totally 5 wireless modes including Station Access Point WDS Station WDS Access Po...

Страница 27: ...only appears when the device is configured to Access Point mode or WDS Access Point mode The device can only work on one channel at the same time Frequency scan list This only appears when the device...

Страница 28: ...n needs to guarantee the wireless security WPA Encryption method supported by 802 11 Protocol 7 Network 7 1 Router mode DH PFM881 acts as a router when configured to Router mode In router mode the con...

Страница 29: ...DH PFM881 User Manual All Right Reserved Page 28 Figure 21 Connection figure of router mode The Network page is shown in Figure 22...

Страница 30: ...DH PFM881 User Manual All Right Reserved Page 29 Figure 22 Network Router mode...

Страница 31: ...on Primary DNS and Secondary DNS Please check with the ISP for the information Gateway IP The IP address of WAN gateway 7 2 Bridge mode In Bridge mode there is no WAN port The LAN port of the POE adap...

Страница 32: ...feature can be set to static routing 7 7 Traffic Shaping Traffic shaping is used to control the traffic of ingress egress based on each network port As show below the ingress of wlan0 is limited to 10...

Страница 33: ...arger than rate limit the rate curve will hold a high value for a while then down to stable Below is the table that reflects the relationship between ingress rate limit and burst Ingress Throughput wh...

Страница 34: ...suddenly down to stable 7 8 VLAN Settings The VLAN function allows user to create multiple virtual local area network As show below we add a VLAN on port wlan0 The VLAN ID is 10 The range of VLAN ID...

Страница 35: ...DH PFM881 User Manual All Right Reserved Page 34 Figure 26 VLAN Setting Below is a common usage Figure 27 VLAN Scenarios 8 Advanced The Advanced page is shown in Figure 28...

Страница 36: ...omatically by enabling Auto ACK Timeout Adjust parameter Aggregation It enables several data frames of 802 11 to be aggregated and transmitted out thus improve the throughput In default it s enabled M...

Страница 37: ...value signal strength LED2 value LED1 is lighted on When LED2 value signal strength LED3 value both the LED1 and LED2 are lighted on When signal strength LED3 value all three LEDs are lighted on 9 Sys...

Страница 38: ...ck update button the firmware can be updated to the latest version Firmware reboot Click the Reboot button to reboot the device Restore Factory Settings Click the Reset button to restore to the factor...

Страница 39: ...ols Ping IP User can input the destination IP address of another device and click Ping button If that destination device is successfully connected to the DH PFM881 device the result shows Alive otherw...

Страница 40: ...ould be the IP address of the AP the Client is connecting to Startup Delay specify initial time delay in seconds until first ping request is sent by the Ping Watchdog Ping Failure Specify the number o...

Страница 41: ...ct the client and the IPERF server to fill in the IP address of the device 1 The number of IPERF threads for testing the number of threads running at the same time it is recommended to set up 10 IPERF...

Страница 42: ...d the user is able to modify the device s page Note the client must be able to join the AC after it is connected to an access point that has been joined to the AC 12 Logout When you click logout butto...

Страница 43: ...n status in the Status page 13 2 WDS Access Point WDS Station WDS Repeater Network Figure 33 WDS Network If there is a block such as a building is in between the point to point connection one TuroBrid...

Страница 44: ...he DH PFM881 device using the web based configuration menu 1 In wireless page set the device to route mode disable the firewall If the internet provided by the ISP DH PFM881 connected to has a DHCP se...

Страница 45: ...881 device and the POE adaptor is more than 40 meters long 2 The Ethernet cable quality is not good enough and it should be Cat 5e or even Cat 6 cable 3 The RJ 45 plugs are not well connected 2 Cannot...

Страница 46: ...on device and AP device is not aligned very well including both horizontally and vertically since the antenna of the DH PFM881 is directional 3 The Station device is installed in the windows and the w...

Страница 47: ...ot connected very well 7 The internet access is lost and the internet speed is low 1 There are too much stations connected to one AP 2 AP signal is too weak 3 There are interference sources nearby 4 C...

Страница 48: ...roduct generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is n...

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