Zhejiang Dahua Vision Technology DH PFM881 User Manual
Dahua 5.8GHz Wireless AP/CPE User Manual
Dahua 5.8GHz Wireless AP/CPE
User Manual
Version： 1.0.0
Zhejiang Dahua Technology CO., LTD
Dahua 5.8GHz Wireless AP/CPE User Manual
File Version Description
Sheet 1 Version Description
Version Release Time Revised Chapters Author
1.0 2014-05-12 Establish cl
Reference Materials
Manual Purposes
The manual mainly provides the users with some help to get familiar with DH-PFM88X and how to
use DH-PFM88X; especially they can solve some common problems when some troubles occur to the
device. The manual is mainly involved in DH-PFM88X hardware info, various parameters of webpage,
configuration mode, networking mode, malfunction analysis and some other aspects, which can
effectively help users to get familiar with the usage of the device quickly and shorten the time of entry
Bridge series products for users.
Statement
The right of final explanation of this file belongs to Zhejiang Dahua Technology CO., LTD; our
company is not liable for any damage of the device caused by unauthorized use.
Noun Definition and Acronym Description
Sheet 2 Noun Definition and Acronym Description
SN
Definition or
Acronym
Description
1 DH-PFM880
Long-distance wireless transmission server AP
2 DH-PFM881 CPE client
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Dahua 5.8GHz Wireless AP/CPE User Manual
Table of Contents
1 Product Overview ......................................................................................................... - 1 -
1.1 Product Introduction ............................................................................................................................ - 1 -
1.2 Electrical Specifications ...................................................................................................................... - 4 -
1.3 Product Packaging List ........................................................................................................................ - 6 -
1.4 Product Features .................................................................................................................................. - 6 -
1.5 Application Range ............................................................................................................................... - 7 -
1.6 Hardware Description .......................................................................................................................... - 8 -
1.7 Hardware Description .......................................................................................................................... - 8 -
2 Product Installation ................................................................................................... - 10 -
2.1Line Connection.................................................................................................................................. - 10 -
2.2Restore Default Factory Setting .......................................................................................................... - 11 -
3 Quick Configuration .................................................................................................. - 12 -
3.1 Log In .............................................................................................................................................. - 12 -
3.2 Device Quick Configuration through Setting W izard ...................................................................... - 13 -
4. TDMA ................................................................................................................................ - 18 -
5. Status Display ................................................................................................................ - 19 -
5.1 Status Display .................................................................................................................................... - 19 -
5.2 Real-Time Monitoring ....................................................................................................................... - 20 -
6. Wireless Setting ............................................................................................................ - 22 -
7. Network Setting ............................................................................................................. - 23 -
7.1 Route Mode ....................................................................................................................................... - 23 -
7.2 Bridge Mode ...................................................................................................................................... - 25 -
7.3 Firewall .............................................................................................................................................. - 25 -
8. Advanced Settings ....................................................................................................... - 27 -
9. System Settings ............................................................................................................ - 29 -
10. Tools Application ....................................................................................................... - 30 -
11. Common Networking Mode ..................................................................................... - 33 -
11.1 W ireless Point-to-Point .................................................................................................................... - 33 -
11.2 W ireless Point–to-Multipoint ........................................................................................................... - 34 -
11.3 W ireless Coverage Bilnd Angle Adjus tment Mode ......................................................................... - 35 -
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Dahua 5.8GHz Wireless AP/CPE User Manual
11.4 Route Mode Networking .................................................................................................................. - 36 -
12. FAQ ................................................................................................................................ - 38 -
13. Construction attention for wireless bridge and monitoring. ...................... - 40 -
13.1 Construction attention ...................................................................................................................... - 40 -
13.2 T est Situation ................................................................................................................................... - 41 -
13.3 Reference Setting: ............................................................................................................................ - 42 -
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Dahua 5.8GHz Wireless AP/CPE User Manual
1 Product Overview
DH-PFM88X series device is a device with unique built-in TDMA wireless technology, which
integrates industry-leading core technology and has the features of long distance transmission, high
throughput rate and strong anti-interference.
TDMA，20M/40MHz bandwidth flexible configuration, rate control, ACK overtime auto adjustment
and etc. TDMA effectively solved the problem of hidden node which bothers large-scale
point-to-multipoint WLAN. 20M/40MHz bandwidth flexible configuration achieved a balance between
scarce wireless bandwidth resource and complex working scenario. Advanced rate control algorithm can
quickly adapt to channel quality change and at the same time keep the rate stable as much as possible.
Auto ACK-Timeout Adjust technology can auto detect the distance between access point and client;
adjust wireless parameter to optimize the device performance.
DH-PFM880 max transmission distance can reach 5km, max transmission rate can reach 300Mbps,
and it also has excellent long-distance transmission performance, It can be used as wireless bridge
between point-to-point and point-to-multipoint remote access, and a base station AP for WI-FI wireless
coverage.
1.1 Product Introduction
PFM has the most advanced design technology in the industry; compact body contains base station
and wireless transmission effect and an advantage of high performance.
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses, and can
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Dahua 5.8GHz Wireless AP/CPE User Manual
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 no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be determined by
turning the equipment OFF and ON, the user is encouraged to try to correct the interference by one or
more of the following measures:
Reorient or relocate the receiving antenna
Increase the separation between the equipment and receiver
Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected
Consult the dealer or an experienced radio/TV technician for help.
The manufacturer is not responsible for any radio or TV interference caused by unauthorized
modifications to this equipment. Such modifications could void the user’s authority to operate the
equipment.
To satisfy FCC RF exposure requirements for mobile and base station transmission devices, a
separation distance of 20 cm or more should be maintained between the antenna of this device and
persons during operation.
To ensure compliance, operation at closer than this distance is not
recommended. The antenna(s) used for this transmitter must not be co-located or operating in
conjunction with any other antenna or transmitter.
Integrated advanced TDMA, MIMO and other advanced technologies. Innovative compatibility and
improvement of 802.11n protocol guaranteed long distance, throughput rate and anti-interference ability
of device wireless transmission. DH-PFM88X series wireless device owns following advantages
compared with other brand products:
1. Integrated Technology
DH-PFM88X with built-in operating system integrated TDMA, which effectively solved the problem
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Dahua 5.8GHz Wireless AP/CPE User Manual
of hidden node which bothers large-scale point-to-multipoint WLAN. Operating system adopts
advanced rate control algorithm which can quickly adapt to channel quality change and at the same
time keep the rate stable as much as possible. It is suitable for long-distance wireless transmission
and solved the problem of long-distance point-to-point access, which makes more access number
and rate distribution more average, which is fit for the application of operator and wireless
monitoring field.
2. Long Transmission Distance, High Throughput Rate
DH-PFM88X max transmission distance can reach 5km, max transmission rate can reach 300Mbps,
and it also has excellent long-distance transmission performance, Its long-distance transmission
and high performance can meet the users’ demand of high bandwidth and long-distance
communication.
3. Integrated Watchdog
DH-PFM88X integrated hardware watchdog which monitors system operation all the time. Once the
system works abnormally, watchdog will reset the system and make it restart, which effectively
guarantees the stability of DH-PFM88X.
4. Ping Watchdog Function Real-time Detect Link
Ping Watchdog function can detect if the link works normally, it will help to restart the device when
malfunction occurs to the link, which guarantees stability of the link.
5. A great number of frequencies provided to users
Currently most wireless products are working in standard 802.115.8G frequency, but the standard
5.8G frequency band is relatively less. 5.8G device will be more susceptible to interference when
the use of 5.8G device is very extensive. However, DH-PFM88X products increased support for
5.8G nearby frequency, which will make the working frequency expand to 4920MHz-6100MHz.
Because the interference of some frequencies is very little, the client working in these frequencies
and performance of access point are better than other frequencies. DH-PFM88X’s support for
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Dahua 5.8GHz Wireless AP/CPE User Manual
non-standard frequency reduced the interference from outside wireless products and effectively
improved the throughput rate of DH-PFM88X, which will meet users’ demand for high bandwidth.
Attention: Please confirm if it conforms to local laws and regulations and radio management
regulations before using these non-standard frequency bands.
6. Adapt to complex working environment
DH-PFM88X can work in complex environment, working temperature is between -30℃ and 70℃,
working humidity is between 5％ and 95％. DH-PFM88X can still maintain high throughput rate if it
works in thunderstorm, high temperature high humidity, low temperature low humidity and other
severe weather conditions for a long time.
1.2 Electrical Specifications
See sheet 3 for the electrical specifications of DH-PFM88X.
Type Item DH-PFM880 DH-PFM881
Standard IEEE802.11 a/n
Modulation Mode 802.11 a/n: OFDM
External antenna：gain 16dBi Built-in antenna：gain 15dBi
+9dBm(@MCS0,11n)
0-3KM 0-5KM
＋9dBm(@MCS0,11n)
5.725GHz~5.85GHz
SRRC
Horizontal 90°，vertical 12° Horizontal 40°，vertical 15°
Wireless
Technology
Antenna
Equivalent Output
Power
Receiving Sensitivity -74dBm @ 65Mbps, -96dBm@1Mpbs
Optimal
Transmission
Distance
Working Frequency
Band
Wireless
Authentication
Wireless Direction
Angle
11n:13.5/15/27/30/40.5/45/54/60/81/90/108/120/121.5/135/150/162/
Transmission Rate
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180/216/240/270/300Mbps (40MHz Channel width)
11n ： 130/117/104/78/65/58.5/52/39/26/19.5/13/6.5Mbps (20MHz
Channel width)
Dahua 5.8GHz Wireless AP/CPE User Manual
11a ：54/48/36/24/18/12/9/6Mbps(self-adaption)
Power Module Port
1*POE RJ45(IN: 220V, OUT: 24V/0.5A)、1*LAN RJ45
Power Consumption MAX 10W MAX 8W
Port 1*POE RJ45
Indicator Light N/A
1*POE RJ45、1*LAN RJ45
Wi-Fi status indicator light / LAN
port indicator light / Power
indicator light / Signal intensity
indicator light
Hardware
Working
Temperature
Storage
Temperature
Working Humidity
Equipment
Dimension(mm)
Antenna
Dimension(mm)
-30℃～+70℃
-30℃～+80℃
5%～95%RH( no condensation)
233×233×45mm 280×30×80mm
450×140×35 mm N/A
Equipment Weight 2.4Kg 0.45Kg
Antenna Weight 1.26Kg N/A
Protection Level IP66 N/A
Mast Diameter 40mm~60mm
Encryption Way WEP/WPA-PSK/WPA2/CCMP(AES)/TKIP
Network Mode Route/Netwo rk Bridge
Working Mode Access Point/Client/WDS AP/WDS client/WDS Repeater
Security Mechanism IP/MAC address filtering, hide network name and etc
Network Protocol TCP/UDP/ARP/ICMP/DHCP/HTTP/NTP
Software
TDMA
Enhancement
Auto ACK-Timeout
Adjust
Management and
Log
Support (TDMA eliminate hidden nodes influence and greatly
improve one-to-many performance）
Support (Auto optimize parameter within long-distance
communication and make the performance optimal）
NTP, SNMP, Syslog, Telnet
Webpage
Configuration
Support webpage configuration
Management
Firmware Update Support Firmware webpage update
Channel Width 20M/40MHz
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Dahua 5.8GHz Wireless AP/CPE User Manual
Sheet 3
1.3 Product Packaging List
DH-PFM880
y Host *1；
y Antenna *1
y Feeder line *2
y POE power supplier (24V/0.5A)*1；
y Quick configuration manual；
y Compact disc；
y Accessory
DH-PFM881
y Host *1；
y POE power supplier (24V/0.5A)*1；
y Quick configuration manual；
y Compact disc；
y Ribbon *2；
1.4 Product Features
z Adopt high performance 802.11n 2X2 MIMO chip，max rate 300Mbps，outdoor max transmission
distance 5km
z Support five working modes: AP, Station, AP-WDS, Station-WDS, Repeater-WDS
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Dahua 5.8GHz Wireless AP/CPE User Manual
z Use unique TDMA technology, intelligent rate control, auto ACK overtime adjustment and some
other technologies.
z TDMA protocol overcame 802.11 inherent problem of inherent node, which makes the product have
better long-distance and point-to-point performance.
z Support point-to-point and point-to-multipoint transmission modes.
z Exclusive antenna, radio-frequency amplifier, low noise receiver design, ensure long-distance video,
audio and data transmission.
z Customize common scenario and working mode for users, make it convenient for non-wireless
professionals to use and install.
z Exclusive TDMA technology can maximize the use of bandwidth resource and better support
point-to-multipoint data transmission.
z POE power supply，support internati onal universal 802.3af standard，power supply mode is more
convenient and reliable.
z Remote control and management through webpage, easy for configuration.
z Water-proof and ultraviolet-proof cover ensures outdoor stable operation for the device.
1.5 Application Range
1. Safe towns, safe construction sites, safe scenic area
2. Playground, ranch, uptown crossroad and other no blocking scenarios.
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Dahua 5.8GHz Wireless AP/CPE User Manual
1.6 Hardware Description
See sheet 4 for the simple hardware information of DH-PFM88X:
Hardware Index
CPU/Baseband Radio Atheros AR7240/AR9280
Memory 32MB DRAM, 8MB Flash
Physical Port
LED Indicator Light
Power Supply POE, Power Adapter 24V/0.5A
2 × 10/100M Base-TX (Cat. 5/5E, RJ-45)Internet
access(DH-PFM881)
1 × 10/100M Base-TX (Cat. 5/5E, RJ-45)Internet
access(DH-PFM880)
Power, LAN, WLAN, 3×Link Quality(DH-PFM881)
Sheet 4
1.7 Hardware Description
In order to make users not have to login webpage, and let them have a rough idea of current
working situation of DH-PFM881 intuitively with naked eyes, DH-PFM881 adopts LED to show
current working condition and connection quality. LED is mainly divided into two parts, on e is device
status, and the other is connection quality. See Figure 1 for more details, the first LED from left is
power indicator, the second is network indicator, the third is connection indicator; the first to the third
from right are signal intensity indicator, see sheet 5 for more details.
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Dahua 5.8GHz Wireless AP/CPE User Manual
Figure 1
LED Color Status
POWER Green Light on means DH-PFM881 connected
power
LAN Green Light on means DH-PFM881 LAN port is
connected to external device
WLAN Green Light on means wireless of DH-PFM881 is
enabled.
Flashing light means the device wireless is
enabled and transmitting data by wireless.
Signal Intensity
Red Indicator shows the signal intensity
Yellow
Green
Green light on means high signal intensity
Yellow light on means medium signal
intensity
Red light on means weak signal or no
signal
Sheet 5
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Dahua 5.8GHz Wireless AP/CPE User Manual
2 Product Installation
The line connection mode is different under different network mode, because the device default
setting is bridge mode. This chapter mainly describes the line connection mode of bridge mode, please
refer to chapter 7 network setting for the connection mode of route mode.
2.1 Line Connection
See Figure 2 for the installation of DH-PFM881.
Figure 2
DH-PFM881 device has two internet accesses (RJ45 ports), which are marked as “POE” and
“LAN2” respectively. The device default setting is bridge mode, so “POE” port is connected to POE
power port by network cable and provides DH-PFM881 device with 24V power and data connection.
“LAN2” port can be linked to IP Camera (such as video surveillance application) and other devices.
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