TRENDnet TEW-738APBO User manual

TRENDnet User’s Guide
Table of Contents

© Copyright 2014TRENDnet. All Rights Reserved.
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TRENDnet User’s Guide
Table of Contents
Contents
Introduction ...........................................................................................................4
Package Contents .......................................................................................................... 4
Hardware Feature.......................................................................................................... 5
System Concept......................................................................................................6
Product Benefit.............................................................................................................. 7
Installation Considerations ............................................................................................ 7
Installation ..................................................................................................................... 7
Configuration ................................................................................................................. 8
Applications ...........................................................................................................9
AP Mode (including Access Point + WDS)...................................................................... 9
WDS Mode (Pure WDS) ............................................................................................... 10
Client Bridge + Universal Repeater Mode ................................................................... 10
CPE + AP Mode (Router Client + Access Point) ............................................................ 11
Web Management Interface Instructions.............................................................11
AP Mode Configuration ........................................................................................12
External Network Connection...................................................................................... 12
Network Requirement ................................................................................................. 12
Configure LAN IP ...................................................................................................... 12
Wireless LAN Network ................................................................................................. 15
Wireless General Setup............................................................................................ 15
Wireless Advanced Setup......................................................................................... 15
Wireless WMM QoS Setup....................................................................................... 17
Create Virtual AP (VAP) ............................................................................................ 19
Virtual AP Setup ....................................................................................................... 20
Wireless MAC Filter Setup........................................................................................ 22
Wireless Network Expansion ................................................................................... 22
System Status .............................................................................................................. 23
System Overview...................................................................................................... 23
Associated Clients Status ......................................................................................... 24
Show WDS Link Status.............................................................................................. 24
Extra Information..................................................................................................... 25
Event Log.................................................................................................................. 26
WDS Mode Configuration..................................................................................... 26
External Network Connection ..................................................................................... 26
Network Requirement ............................................................................................. 26
Configure LAN IP ...................................................................................................... 27
Wireless Network Expansion....................................................................................... 27
Wireless General Setup............................................................................................ 27
Wireless Advanced Setup......................................................................................... 28
Wireless WMM QoS Setup....................................................................................... 29
WDS Setup ............................................................................................................... 31
System Status .............................................................................................................. 32
System Overview ..................................................................................................... 32
Extra Information..................................................................................................... 33
Event Log.................................................................................................................. 34
WDS Link Status ....................................................................................................... 34
Repeater Mode ....................................................................................................35
External Network Connection ..................................................................................... 35
Network Requirement ............................................................................................. 35
Configure LAN IP ...................................................................................................... 35
Wireless Network Expansion....................................................................................... 36
Wireless General Setup............................................................................................ 36
Wireless Advanced Setup......................................................................................... 37
Wireless WMM QoS Setup....................................................................................... 39
Site Survey ............................................................................................................... 40
Repeater AP Setup ................................................................................................... 41
Wireless MAC Filter Setup ....................................................................................... 43
Create Wireless Profile ............................................................................................ 43
Bandwidth Control................................................................................................... 45
Configure SNMP Setup............................................................................................. 45
Configure Time Policy .............................................................................................. 46
System Status .............................................................................................................. 47

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TRENDnet User’s Guide
Table of Contents
System Overview...................................................................................................... 47
DHCP Client .............................................................................................................. 48
Extra Information ..................................................................................................... 48
Event Log.................................................................................................................. 49
Associated Client List ............................................................................................... 49
Remote AP status ..................................................................................................... 50
CPE + AP Mode Configuration ..............................................................................50
External Network Connection...................................................................................... 50
Network Requirement ............................................................................................. 50
Configure CPE Setup................................................................................................. 51
Configure DDNS Setup ............................................................................................. 52
Configure LAN IP ...................................................................................................... 53
Configure Static IP address ...................................................................................... 54
Access Point Association.............................................................................................. 54
Wireless General Setup............................................................................................ 54
Wireless Advanced Setup......................................................................................... 55
Wireless WMM QoS Setup....................................................................................... 56
Site Survey................................................................................................................ 58
Create Wireless Profile............................................................................................. 58
AP Setup................................................................................................................... 60
Wireless AP MAC Filter Setup .................................................................................. 62
Access Control ............................................................................................................. 62
DMZ.......................................................................................................................... 62
IP Filter Setup ........................................................................................................... 63
MAC Filter Setup ...................................................................................................... 63
Virtual Server ........................................................................................................... 64
Bandwidth Control ................................................................................................... 64
Routing ..................................................................................................................... 65
Status ........................................................................................................................... 65
System Overview...................................................................................................... 65
DHCP Client .............................................................................................................. 66
Extra Information ..................................................................................................... 67
Event Log.................................................................................................................. 68
Associated Client List ............................................................................................... 68
Remote AP status..................................................................................................... 68
System Management ...........................................................................................68
Configure Management ........................................................................................... 68
Configure System Time ............................................................................................ 70
Configure SNMP Setup............................................................................................. 70
Enable UPNP ............................................................................................................ 71
Backup / Restore and Reset to Factory.................................................................... 71
Firmware Upgrade ................................................................................................... 72
Network Utility......................................................................................................... 72
Reboot...................................................................................................................... 73
Mounting bracket installation..............................................................................73
Package contents......................................................................................................... 73
Wall mount bracket..................................................................................................... 74
Pole mount bracket ..................................................................................................... 74
Appendix.............................................................................................................. 75
Windows TCP/IP Settings ............................................................................................ 75
Enabling UPnP in Windows XP..................................................................................... 76
Limited Warranty......................................................................................................... 78

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TRENDnet User’s Guide
TEW-738APBO
4
Introduction
TRENDnet’s 10 dBi Outdoor PoE Access Point, model TEW-738APBO,
provides Wireless N300 building-to-building connectivity for clear line of
sight distances of up to 8 km (5 miles)*. A variety of installation scenarios
are facilitated with Access Point (AP), Wireless Distribution System
(WDS), Repeater, and CPE + AP modes. The rugged aluminum IP67 rated
housing comes with wall and pole mounting hardware.
Performance
Multi-Mode Support
Supports Access Point (AP), Wireless Distribution System (WDS), WDS +
AP, and CPE + AP modes
Wireless N300 (2.4 GHz)
Compliant with 802.11n/g/b technology (2.4 GHz) with data rates up to
300 Mbps
Outdoor Rated
Durable aluminum enclosure with an IP67 outdoor weather rating
Directional Antenna
Built in 10 dBi directional antenna
Distance Rating
When networked to the same unit, this unit is rated for connecting over
clear line-of-sight distances of up to 8 km (5 miles)*
Power over Ethernet (PoE)
Comes with a proprietary PoE injector, so that it can connect a regular
non-PoE switch
Logs
Real time logs and statistics help troubleshooting
Encrypted Wireless
Support for wireless encryption of up to WPA2
Multiple SSIDs
Create up to seven additional SSIDs
Compatibility
Compatible with legacy wireless devices
Mounting Hardware
Pole and wall mount hardware included
* Effective wireless coverage may vary depending on the wireless
device's output power, antenna gain, antenna alignment, receiving
sensitivity, and radio interference. Additionally environmental factors
such as weather conditions, physical obstacles, and other considerations
may affect performance. For optimal results, we recommended
consulting a professional installer for site survey, safety precautions, and
proper installation.
**Recommended max. PoE cable length of 70 m
Package Contents
The standard package contents
•TEW-738APBO
•Multi-Language Quick Installation Guide
•CD-ROM (User’s Guide)
•PoE Injector &Power cord (All in one type)
•Mounting Kit
•Grounding wire
•Waterproof kit

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TRENDnet User’s Guide
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Hardware Feature
Front Panel
•Housing:IP 66/67 housing
Bottom Panel
•LED
oLAN:Turns on when there is a LAN connection and blinks when data is running
through the LAN port.
oWLAN:Turns on when wireless is enabled and blinks during wireless transmission
occur.
oPWR:Indicates the unit is powered on.
•Reset Button (unscrew cap)
oReboot:Press and hold the reset button for 2 seconds to restart the unit. All LEDs
except PWR will turn off before the unit turns back on and wireless transmission
occur.
oReset –Press and hold the reset button for more than 10 seconds to restore the
unit back to factory default settings.
•PoE Port (unscrew cap) – Connect the network cable that is connected to the
provided PoE injector to power and configure the unit.
Housing
LAN/WLAN/PWR
LEDs
Reset Button
PoE Port

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TRENDnet User’s Guide
TEW-738APBO
6
System Concept
The TEW-738APBO is not only designed and used as a traditional outdoor AP, but also
with rich features tailored for WISP applications. The two-level management capability
and access control ease WISP and owners to maintain and manage wireless network in a
more controllable fashion. Main applications are listed as follows with illustration:
•Wireless CPE for Multi Dwelling Unit/Multi-Tenant Unit (MDU/MTU) complexes
including apartments, dormitories, and office complexes.
•Outdoor Access Point for school campuses, enterprise campuses, or manufacture
plants.
•Indoor Access Point for hotels, factories, or warehouses where industrial grade
devices are preferred.
•Public hotspot operation for café, parks, convention centers, shopping malls, or
airports.
•Wireless coverage for indoor and outdoor grounds in private resorts, home yards,
or gulf course communities.

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TRENDnet User’s Guide
TEW-738APBO
7
Product Benefit
The 10 dBi Outdoor PoE Access Point is the point of connection to Wireless Outdoor
Network for service provider deploying last mile services to business or residential
broadband subscribers.. Network administrators can create multiple subscriber service
tier using per-subscriber rate limiting features, and manage centrally.
Installation Considerations
There are a number of factors that can impact the range of wireless devices.
1. Adjust your wireless devices so that the signal is traveling in a straight path, rather
than at an angle. The more material the signal has to pass through the more signal
you will lose.
2. Keep the number of obstructions to a minimum. Each obstruction can reduce the
range of a wireless device. Position the wireless devices in a manner that will
minimize the amount of obstructions between them.
3. Building materials can have a large impact on your wireless signal. In an indoor
environment, try to position the wireless devices so that the signal passes through
less dense material such as dry wall. Dense materials like metal, solid wood, glass
or even furniture may block or degrade the signal.
4. Antenna orientation can also have a large impact on your wireless signal. Use the
wireless adapter’s site survey tool to determine the best antenna orientation for
your wireless devices.
5. Interference from devices that produce RF (radio frequency) noise can also impact
your signal. Position your wireless devices away from anything that generates RF
noise, such as microwaves, radios and baby monitors.
If you are still experiencing low or no signal consider repositioning the wireless devices
or installing additional access points. The use of higher gain antennas may also provide
the necessary coverage depending on the environment.
Installation
1. Unscrew the black cap covering the PoE port of the TEW-738APBO
2. Install the waterproof kit and insert one end of an Ethernet cable through the kit.
3. Connect the Ethernet cable to the PoE port of the TEW-738APBO
4. Tighten and secure the seal nut of the waterproof kit.
5. Connect the other end of the Ethernet cable to the P+DATA Out port on the PoE
injector.

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TRENDnet User’s Guide
TEW-738APBO
8
6. Using another Ethernet cable, connect one end to the DATA IN port of the injector.
7. Connect the other end of the Ethernet cable to the LAN port of your network.
8. Plug the power cord into the injector. Then connect the plug into a power outlet.
Configuration
1. Open a web browser, type the IP address of the Access Point and then press Enter.
The default IP address is 192.168.10.100.
2. Enter the Username and Password and click OK. By default the Username: root and
Password: root.
3. Click the Wizard button and follow the setup wizard instructions. Click Finish to
complete installation.

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TRENDnet User’s Guide
TEW-738APBO
9
Applications
TEW-738APBO is multiple mode system which can be configured either as a wireless
gateway or an access point as desired. It also can be used as a WDS link for Ethernet
network expansion. This section depicts different applications on Router AP Mode, AP
Mode, WDS Mode, CPE Mode, Client Bridge + Universal Repeater Mode and CPE + AP
Mode.
AP Mode (including Access Point + WDS)
An access point can be either a main, relay or remote base station. A main base
station is typically connected to a wired network via the Ethernet port. A relay base
station relays data between main base stations and relay stations or remote base
stations with clients. A remote base station is the end point to accept connections
from wireless clients and pass data upwards to a network wirelessly.
Example 1: Access Point without WDS
•It can be deployed as a tradition fixed wireless Access Point
Example 2: Access Point with WDS
•It can be deployed as a tradition fixed wireless Access Point and provides WDS link
to expand network
Main
WDS
Remote
Main
WDS
Remote

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TRENDnet User’s Guide
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10
WDS Mode (Pure WDS)
An access point can be either a main, relay or remote base station. A main base station
is typically connected to a wired network via the Ethernet port. A relay base station
relays data between main base stations and relay stations or remote base stations with
clients. A remote base station is the end point to accept connections from wireless
clients and pass data upwards to a network wirelessly. In this mode, it can support single
or multiple WDS links and no wireless clients can associate with it.
Example 1: Point-to-Point
Example 2 : Point-to-Multi-Point
Example 3 : Multi-Point Repeating bridge
Client Bridge + Universal Repeater Mode
It can be used as an Client Bridge + Universal Repeater to receive wireless signal
over last mile applications, helping WISPs deliver wireless broadband Internet
service to new residential and business customers. In this mode, TEW-738APBO is
enabled with DHCP Server functions. The wired clients of TEW-738APBO are in the
same subnet from Main Base Station and it accepts wireless connections from
client devices.
Inter
WIFI WAN
Main Base
Station
LAN
NA
WDS
Main

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CPE + AP Mode (Router Client + Access Point)
It can be used as an Outdoor Customer Premised Equipment (CPE) to receive
wireless signal over the last mile, helping WISPs deliver wireless broadband Internet
service to new residential and business customers. In this mode, theTEW-738APBO
is a gateway with NAT and DHCP Server functions. The wireless and wired clients of
TEW-738APBO are on the different subnet from Main Base Station and it accepts
wireless connections from client devices.
Web Management Interface Instructions
TEW-738APBO supports web-based configuration. Upon the completion of hardware
installation, TEW-738APBO can be configured through a PC/NB by using its web browser
such as Internet Explorer version 6.0.
•Default IP Address : 192.168.10.100
•Default IP Netmask : 255.255.255.0
•Default User Name and Password : admin/admin
Step
•IP Segment Set-up for Administrator's PC/NB: Set the IP segment of the
administrator's computer to be in the same range as TEW-738APBO for accessing
the system. Do not duplicate the IP Address used here with IP Address of TEW-
738APBO or any other device within the network
Example of Segment:
The valid range is 1 ~ 254 and 192.168.10.254 shall be avoided because it is already
assigned to TEW-738APBO. 192.168.10.10 is used in the example below.
oIP Address : 192.168.10.10
oIP Netmask : 255.255.255.0
•Launch Web Browser
Launch web browser to access the web management interface of system by
entering the default IP Address, http://192.168.10.100, in the URL field, and then
press Enter.
•System Login: The system manager Login Page then appears.
Enter “admin” as User name and “admin” as Password, and then click OK to login
to the system; the root manager account is used as an example here.
•Login Success: System Overview page will appear after successful login.

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TRENDnet User’s Guide
TEW-738APBO
12
AP Mode Configuration
When AP mode is chosen, the system can be configured as an Access Point. This section
provides detailed explanation for users to configure in the AP mode with help of
illustrations. In the AP mode, functions listed in the table below are also available from
the Web-based GUI interface.
External Network Connection
Network Requirement
Normally, TEW-738APBO connects to a wired LAN and provides a wireless connection
point to associate with wireless client as shown in Figure 3-1. Then, Wireless clients
could access to LAN or Internet by associating themselves with TEW-738APBO set in AP
mode.
Configure LAN IP
Here are the instructions to setup the local IP Address and Netmask.
Please click on System -> LAN and follow the below setting.
•Mode: Check either “Static IP” or “Dynamic IP” button as desired to set up the
system IP of LAN port.
•Static IP: The administrator can manually setup the LAN IP address when static IP
is available/ preferred.
oIP Address : The IP address of the LAN port; default IP address is
192.168.2.254
oIP Netmask : The Subnet mask of the LAN port; default Netmask is
255.255.255.0
oIP Gateway : The default gateway of the LAN port; default Gateway is
192.168.2.1
•Dynamic IP: This configuration type is applicable when the TEW-738APBO is
connected to a network with the presence of a DHCP server; all related IP
information will be provided by the DHCP server automatically.
oHostname : The Hostname of the LAN port

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•DNS: Check either “No Default DNS Server” or “Specify DNS Server IP” button as
desired to set up the system DNS.
oPrimary:The IP address of the primary DNS server.
oSecondary: The IP address of the secondary DNS server.
•802.1d Spanning Tree
The spanning tree network protocol provides a loop free topology for a bridged LAN
between LAN interface and 4 WDS interfaces from wds0 to wds3. The Spanning
Tree Protocol, which is also referred to as STP, is defined in the IEEE Standard
802.1d. The Spanning tree always enabled on TEW-738APBO. Below Figures depict
a loop for a bridged LAN between LAN and WDS link
Click Save button to save your changes. Click Reboot button to activate your changes

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TRENDnet User’s Guide
TEW-738APBO
14
WDS
Remote Base Station
WDS
B
locked by
Spanning Tree Protocol
WDS
Remote Base Station
LOOP
Base Station
WDS
Remote Base Station
WDS
Blocked by
Spanning Tree Protocol
WDS
Remote Base Station
LOOP

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TEW-738APBO
Wireless LAN Network
The network manager can configure related wireless settings, General Settings,
Advanced Settings, Virtual AP (VAP) Setting, Security Settings and MAC Filter Settings.
Wireless General Setup
The administrator can change the data transmission, channel and output power settings
for the system. Please click on Wireless -> General Setup and follow the below setting.
•MAC Address: The MAC address of the Wireless interface is displayed here.
•Band Mode: Select an appropriate wireless band; bands available are 801.11b,
802.11b/g, 802.11b/g/n or 802.11n only.
•Channel: Select the desired channel from the drop-down list to have the access
point operate on. Click Auto Scan to scan for the best available channel to use based
on the environment.
•Tx Power: You can adjust the output power of the system to get the appropriate
coverage for your wireless network. Specify digit numbers between 1 to 100 (the
unit is %) for your environment. If you are not sure which setting to choose, then
keep the default setting, 100%.
•RF (ON/OFF) Schedule: Select an assigned schedule of when to have the access
point turn on. Select Always Run to have the access point always on.
When Band Mode select in 802.11a only mode, the HT(High Throughput) settings
should be hidden immediately.
3
•TxStream/Rx Stream: Select the amount of transmit (TX) and Receive (RX) streams.
By default, it's 2.
•Channel Bandwidth: The "20/40” MHz option is usually best. The other option is
available for special circumstances.
•Extensions Channel: Select which section of channels to use for extension channels.
•MCS: This parameter represents transmission rate. By default (Auto) the fastest
possible transmission rate will be selected. You have the option of selecting the
speed if necessary. (Refer to Appendix C. MCS Data Rate)
Wireless Advanced Setup
To achieve optimal wireless performance, it is necessary to tweak advance setting per
requirements properly, not necessary higher the better or lower.
The administrator can change the RTS threshold and fragmentation threshold settings
for the system. Please click on Wireless -> Advanced Setup and follow the below setting.

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•Short Slot: By default, it’s “Enable”for reducing the slot time from the standard 20
microseconds to the 9microsecond short slot time. Slot time is the amount of time a
device waits after a collision before retransmitting a packet. Reducing the slot time
decreases the overall back-off, which increases throughput. Back-off, which is a
multiple of the slot time, is the random length of time a station waits before
sending a packet on the LAN. For a sender and receiver own right of the channel the
shorter slot time help manage shorter wait time to re-transmit from collision
because of hidden wireless clients or other causes. When collision sources can be
removed sooner and other senders attempting to send are listening the channel
(CSMA/CA) the owner of the channel should continue ownership and finish their
transmission and release the channel. Then, following ownership of the channel will
be sooner for the new pair due to shorter slot time. However, when long duration of
existing collision sources and shorter slot time exist the owners might experience
subsequent collisions. When adjustment to longer slot time can’t improve
performance then RTS/CTS could supplement and help improve performance.
•ACK Timeout: ACK timeout is in the range of 1~255 and set in unit of microsecond.
The default value is 32 microsecond. All data transmission in 802.11b/g request an
“Acknowledgement” (ACK) send by receiving radio. The transmitter will resend the
original packet if correspondent ACK failed to arrive within specific time interval,
also refer to as “ACK Timeout”.
ACK Timeout is adjustable due to the fact that distance between two radio links
may vary in different deployment. ACK Timeout makes significant influence in
performance of long distance radio link. If ACK Timeout is set too short, transmitter
will start to “Resend” packet before ACK is received, and throughputs become low
due to excessively high re-transmission. ACK Timeout is best determined by
distance between the radios, data rate of average environment. The Timeout value
is calculated based on round-trip time of packet with a little tolerance, So, if
experiencing re-transmissions or poor performance the ACK Timeout could be
made longer to accommodate.
•Beacon Interval: Beacon Interval is in the range of 20~1024 and set in unit of
millisecond. The default value is 100 msec.
Access Point (AP) in IEEE 802.11 will send out a special approximated 50-byte
frame, called “Beacon”. Beacon is broadcast to all the stations, provides the basic
information of AP such as SSID, channel, encryption keys, signal strength, time
stamp, support data rate.
All the radio stations received beacon recognizes the existence of such AP, and may
proceed next actions if the information from AP matches the requirement. Beacon
is sent on a periodic basis, the time interval can be adjusted.
By increasing the beacon interval, you can reduce the number of beacons and
associated overhead, but that will likely delay the association and roaming process
because stations scanning for available access points may miss the beacons. You
can decrease the beacon interval, which increases the rate of beacons. This will
make the association and roaming process very responsive; however, the network
will incur additional overhead and throughput will go down.
•DTIM Interval: The DTIM interval is in the range of 1~255. The default is 1.
DTIM is defined as Delivery Traffic Indication Message. It is used to notify the
wireless stations, which support power saving mode, when to wake up to receive
multicast frame. DTIM is necessary and critical in wireless environment as a
mechanism to fulfill power-saving synchronization. A DTIM interval is a count of the
number of beacon frames that must occur before the access point sends the
buffered multicast frames. For instance, if DTIM Interval is set to 3, then the Wi-Fi
clients will expect to receive a multicast frame after receiving three Beacon frame.
The higher DTIM interval will help power saving and possibly decrease wireless
throughput in multicast applications.
•RTS Threshold: TRTS Threshold is in the range of 1~2347 byte. The default is 2347
byte. The main purpose of enabling RTS by changing RTS threshold is to reduce
possible collisions due to hidden wireless clients. RTS in AP will be enabled
automatically if the packet size is larger than the Threshold value. By default, RTS is
disabled in a normal environment supports non-jumbo frames.
•Short Preamble: By default, it’s “Enable”. To Disable is to use Long 128-bit Preamble

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Synchronization field. The preamble is used to signal "here is a train of data coming"
to the receiver. The short preamble provides 72-bit Synchronization field to improve
WLAN transmission efficiency with less overhead.
•WMM: By default, it's “Enabled”.
Wireless WMM QoS Setup
To achieve optimal wireless performance, it is necessary to tweak advance setting per
requirements properly, not necessary higher the better or lower.
The administrator can change the RTS threshold and fragmentation threshold settings
for the system. Please click on Wireless -> Advanced
•WMM Parameters of Access Point : This affects traffic flowing from the access point
to the client station
Queue
Data
Transmitted
AP to Clients
Priority Description
AC_BK Background. Low High throughput. Bulk data that requires maximum
throughput and is not time-sensitive is sent to this
queue (FTP data, for example).
AC_BE Best Effort Medium Medium throughput and delay. Most traditional IP
data is sent to this queue
AC_VI Video High
Minimum delay. Time-sensitive video data is
automatically sent to this queue
AC_VO Voice High Time-sensitive data like VoIP and streaming media
are automatically sent to this queue
Configuring QoS options consists of setting parameters on existing queues for different
types of wireless traffic. You can configure different minimum and maximum wait
times for the transmission of packets in each queue based on the requirements of the
media being sent. Queues automatically provide minimum transmission delay for
Voice, Video, multimedia, and mission critical applications, and rely on best-effort
parameters for traditional IP data.
As an Example, time-sensitive Voice & Video, and multimedia are given effectively
higher priority for transmission (lower wait times for channel access), while other
applications and traditional IP data which are less time-sensitive but often more data-
intensive are expected to tolerate longer wait times.
oAifsn: The Arbitration Inter-Frame Spacing Number specifies a wait time (in
milliseconds) for data frames
oCWmin: Minimum Contention Window. This parameter is input to the algorithm
that determines the initial random back-off wait time ("window") for retry of a
transmission. The value specified here in the Minimum Contention Window is the
upper limit (in milliseconds) of a range from which the initial random back-off
wait time is determined.
oCWmax: Maximum Contention Window. The value specified here in the
Maximum Contention Window is the upper limit (in milliseconds) for the doubling
of the random back-off value. This doubling continues until either the data frame
is sent or the Maximum Contention Window size is reached. Once the Maximum
Contention Window size is reached, retries will continue until a maximum number
of retries allowed is reached. Valid values for the "cwmax" are 1, 3, 7, 15, 31, 63,
127, 255, 511, or 1024. The value for "cwmax" must be higher than the value for
"cwmin".
oTxop: Transmission Opportunity is an interval of time when a WME AP has the
right to initiate transmissions onto the wireless medium (WM). This value
specifies (in milliseconds) the Transmission Opportunity (TXOP) for AP; that is, the

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interval of time when the WMM AP has the right to initiate transmissions on the
wireless network.
oACM:Admission Control Mandatory, ACM only takes effect on AC_VI and AC_VO.
When you do not click Checkbox, it means that the ACM is controlled by the
connecting AP. If you click Checkbox, it means that the Client is in charge.
oAckPolicy:Acknowledgment Policy, WMM defines two ACK policies: Normal ACK
and No ACK. Click “Checkbox” indicates “No ACK”
When the no acknowledgment (No ACK) policy is used, the recipient does not
acknowledge received packets during wireless packet exchange. This policy is
suitable in the environment where communication quality is fine and interference
is weak. While the No ACK policy helps improve transmission efficiency, it can
cause increased packet loss when communication quality deteriorates. This is
because when this policy is used, a sender does not retransmit packets that have
not been received by the recipient. When the Normal ACK policy is used, the
recipient acknowledges each received unicast packet.
•WMM Parameters of Station: This affects traffic flowing from the client station to
the access point.
oAifsn: The Arbitration Inter-Frame Spacing Number specifies a wait time (in
milliseconds) for data frames
oCWmin: Minimum Contention Window. This parameter is input to the
algorithm that determines the initial random backoff wait time ("window")
for retry of a transmission. The value specified here in the Minimum
Contention Window is the upper limit (in milliseconds) of a range from
which the initial random backoff wait time is determined.
oCWmax: Maximum Contention Window. The value specified here in the
Maximum Contention Window is the upper limit (in milliseconds) for the doubling
of the random backoff value. This doubling continues until either the data frame
is sent or the Maximum Contention Window size is reached. Once the Maximum
Contention Window size is reached, retries will continue until a maximum number
of retries allowed is reached. Valid values for the "cwmax" are 1, 3, 7, 15, 31, 63,
127, 255, 511, or 1024. The value for "cwmax" must be higher than the value for
"cwmin".
oTxop: Transmission Opportunity is an interval of time when a WME AP has the
right to initiate transmissions onto the wireless medium (WM). This value
specifies (in milliseconds) the Transmission Opportunity (Txop) for AP; that is, the
interval of time when the WMM AP has the right to initiate transmissions on the
wireless network.
oACM: Admission Control Mandatory, ACM only takes effect on AC_VI and AC_VO.
When you do not click Checkbox, it means that the ACM is controlled by the
connecting AP. If you click Checkbox, it means that the Client is in charge.
Click Save button to save your changes. Click Reboot button to activate your changes.
The items in this page are for AP's RF advanced settings and will be applied to all VAPs
and WDS Links.
Queue
Data
Transmitted
Clients to AP
Priority Description
AC_BK Background. Low
High throughput. Bulk data that
requires maximum
throughput and is not time-
sensitive is sent to this queue
(FTP data, for example).
AC_BE Best Effort Medium
Medium throughput and delay.
Most traditional IP data is
sent to this queue
AC_VI Video High
Minimum delay. Time-sensitive
video data is automatically
sent to this queue
AC_VO Voice High
Time-sensitive data like VoIP
and streaming media are
automatically sent to this
queue

© Copyright 2014TRENDnet. All Rights Reserved.
19
TRENDnet User’s Guide
TEW-738APBO
Create Virtual AP (VAP)
The TEW-738APBO support broadcasting multiple SSIDs, allowing the creation of Virtual
Access Points, partitioning a single physical access point into 7logical access points, each
of which can have a different set of security, VLAN Tag(ID) and network settings. Figure
3-2 shows multiple SSIDs with different security type and VLAN settings.
Multiple SSIDs with different Security Type and VLAN Tag
Virtual AP Overview
The administrator can view all of the Virtual AP's settings via this page.
Please click on Wireless -> Virtual AP Setup and the Virtual AP Overview Page appears.
•VAP: Indicate the system's Virtual AP.
•MAC Address: The MAC address of the VAP Interface is displayed here. When you
enable AP and reboot system, the MAC address will display here.
•ESSID: Indicate the ESSID of the respective Virtual AP
•Status: Indicate the Status of the respective Virtual AP. The Primary AP always on.
•Security Type: Indicate a used security type of the respective Virtual AP.
•MAC Filter: Indicate a used MAC filter of the respective Virtual AP.
•Edit: Click Edit button to configure Virtual AP's settings, including security type and
MAC Filter.
SSID 3
VLA
N #5
VLA
N #4
VLA
N #3
VLA
N #2
VLA
N #1
SSID 5
SSID 4
SSID 2
SSID 1
Sales Network
Engineer Network
Market Network
Guest Network
Accounting Network
WPA2-
PSK/AES
WPA2-
PSK/TKIP
WPA-
PSK/AES
WPA-
PSK/TKIP
W
E

© Copyright 2014TRENDnet. All Rights Reserved.
20
TRENDnet User’s Guide
TEW-738APBO
Virtual AP Setup
For each Virtual AP, administrators can configure SSID, VLAN tag(ID), SSID broadcasting,
Maximum number of client associations, security type settings.
Click Edit button on the Edit column, and then a Virtual AP setup page appears.
•ESSID: Extended Service Set ID, when clients are browsing for available wireless
networks, this is the SSID that will appear in the list. ESSID will determine the
service type available to AP's clients associated with the specified VAP.
•Hidden SSID: By default, it’s “Disable”. Enable this option to stop the SSID broadcast
in your network. When disabled, people could easily obtain the SSID information
with the site survey software and get access to the network if security is not turned
on. When enabled, network security is enhanced. It’s suggested to enable it after AP
security settings are archived and setting of AP clients could make to associate to it.
•Client Isolation: Select Enable, all clients will be isolated from each other, that mean
all clients cannot reach to other clients. Below Figures depict Client Isolation and AP
Isolation
•IAPP:
•Maximum Clients: The default value is 32. You can enter the number of wireless
clients that can associate to a particular SSID. When the number of client is set to 5,
only 5 clients at most are allowed to connect to this VAP.
•VLAN Tag (ID) : By default, it’s selected “Disable”.
This system supports tagged Virtual LAN (VLAN). A valid number of 1to 4094 can be
entered after it’s enabled. If your network utilize VLANs you could tie a VLAN Tag to
a specific SSID, and packets from/to wireless clients belonging to that SSID will be
tagged with that VLAN Tag. This enables security of wireless applications by
applying VLAN Tag.
•Security Type: Select the desired security type from the drop-down list; the options
are Disable, WEP, WPA-PSK, WPA2-PSK, WPA-Enterprise, WPA2-Enterprise and
WEP 802.1X.
oDisable: Data are unencrypted during transmission when this option is selected.
•WEP Auth Method: Enable the desire option among OPEN or SHARED
oKey Index: Key index is used to designate the WEP key during data transmission. 4
different WEP keys can be entered at the same time, but only one is chosen.
oWEP Key #: Enter HEX or ASCII format WEP key value; the system supports up to 4
sets of WEP keys.
•WPA-PSK (or WPA2-PSK) : WPA (or WPA2) Algorithms, allows the system accessing
the network by using the WPA-PSK protected access.
oCipher Suite: By default, it is AES. Select either AES or TKIP cipher suites
oGroup Key Update Period: By default, it is 600 seconds. This time interval for
rekeying GTK, broadcast/multicast encryption keys, in seconds. Entering the time-
length is required.