Trango Systems M5830SAP60 5 GHz Wireless Access Point User Manual 5830S Rev 1

Trango Systems Inc 5 GHz Wireless Access Point 5830S Rev 1

Contents

Users Manual

A
Access5830 Series
User Manual-Draft
January 2003
Trango Broadband Wireless
15070 Ave. of Science, Ste. 200
San Diego, California 92128
T 858-653-3900
F 858-621-2725
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
2
Copyright 2001-2003 Trango Broadband Wireless, A division of Trango Systems,
Inc. No part of this publication may be reproduced in any form without the
written permission of the copyright owner.
The information in this publication is subject to change without notice. Trango
Broadband Wireless shall not be liable for errors contained herein or for
incidental or consequential damages in connection with the furnishing,
performance, or use of this manual or the equipment it refers to.
FCC Information:
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
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 radiate radio frequency
energy, and if not installed and used in accordance with these 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
correct the interference by one of more of the following measures:
1) Reorient the antenna;
2) Increase the separation between the affected equipment and the unit;
3) Connect the affected equipment to an outlet on a different circuit from that
which the receiver is connected to;
4) Consult the dealer and/or experienced radio/TV technician for help.
FCC ID Numbers: FCC ID: NCYM5830SAP60
FCC ID: NCYM5830SSU
FCC ID: NCYM5830SSUEXT
CANADA: TBD
IMPORTANT NOTE:
Intentional or unintentional changes or modifications not expressly approved by the party
responsible for compliance must not be made. Any such modifications could void the user’s
authority to operate the equipment and will void the manufacturer’s warranty.
To maintain compliance with the FCC's RF exposure guidelines, both units must be operated at least
20 cm from any person. This is necessary to insure that the product is operated in accordance with
the RF Guidelines for Human Exposure which have been adopted by the Federal Communication
Commission.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
3
CONTENTS
1. For your safety.....................................................................4
2. Welcome............................................................................4
2.1. Documentation conventions ....................................................4
2.2. Check List ..........................................................................5
2.3. Service..............................................................................6
3. Components and Features .......................................................6
3.1. System Overview..................................................................6
3.2. Access Point Unit .................................................................6
3.3. Junction Box.......................................................................7
3.4. Subscriber Unit....................................................................7
4. Installation .........................................................................8
4.1. Access Point Mechanical Installation..........................................8
4.2. Subscriber Unit Mechanical Installation ......................................8
4.3. Wiring............................................................................. 10
4.4. Antenna Alignment ............................................................. 10
4.5. Grounding ........................................................................ 11
5. Setup .............................................................................. 12
5.1. Step by Step Configuration of The AP.................................... 12
5.2. Step by Step Configuration of The SU.................................... 23
6. Site Planning ..................................................................... 28
7. Administration Tools............................................................ 37
7.1. Network Security ............................................................... 37
7.2. Subscriber Database Management ........................................... 37
8. Troubleshooting ................................................................. 38
9. Theory of Operation ............................................................ 42
9.1. Hardware......................................................................... 42
9.1.1. 5.8 GHz Direct Sequence Spread Spectrum ............................. 42
9.1.2. Antenna Technology......................................................... 42
9.2. Software.......................................................................... 42
10. Specifications................................................................. 44
10.1. M5800S-AP-60 Specifications............................................... 44
10.2. M5800S-SU Series Specifications .......................................... 48
APPENDIX: FIRMWARE HARDWARE CROSS REFERENCE............................. 52
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
4
1. For your safety
WARNING
Use extreme care when installing antennas near power lines.
Antenna Installation Instructions: FCC RF Exposure Limits
CAUTION
Do not apply power to the transmitter until the antenna is
connected. Permanent damage may result.
CAUTION
When the unit is in operation, avoid standing directly in
front of the antenna. Strong RF fields are present when
the transmitter is on.
2. Welcome
Thank you for choosing Trango Broadband Wireless to fulfill your wireless Internet
access needs. You are now on your way to using a high-speed wireless link, which can
serve as an alternative to conventional wiring where such wiring is impractical, too
slow or too expensive.
2.1. Documentation conventions
Convention Description
bold Indicates emphasized
text
Example: Note
Italic Indicates a file name
Example:
ap_default.cfg
Bold & italic Indicates a user command
or GUI screen
Example: tftp
Courier New Indicates contents in a file
Courier New Indicates descriptions of
file contents
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
5
2.2. Check List
For each package you receive, you should have the following items:
AP Package Quantity Part Number
Access5830 TM Access Point Radio 1 M5830S-AP-60
Access5830 TM Quick Setup Check List 1 LT-9009
Lockwashers (for Mounting Plate to
Radio) 4 H-9137
10-32”x3/4” Bolts (for Mounting Bracket
to Radio) 4 H-91xx
Mounting bracket kit 1 H-9161
Junction Box 1 320-9014
Power Adapter 1 PT-9005
Programming Cable 1 CA-9013
SU Package, external antenna required Quantity Part Number
Access5830 TM Subscriber Unit Radio 1 M5830S-SU-EXT
Access5830 TM Quick Setup Check List 1 LT-9009
V-shaped Mounting Brackets 2 ES-9181
Threaded 5/16” x 3” Studs (for Mounting
Brackets) 4 H-91xx
Hex Bolts 5/16” (for Mounting Brackets) 8 H-9154
Junction Box 1 320-9014
Power Adapter 1 PT-9005
SU Package, with internal antenna Quantity Part Number
Access5830TM Subscriber Unit Radio 1 M5830S-SU
Access5830 TM Quick Setup Check List 1 LT-9009
Lockwashers (for Mounting Plate to
Radio) 4 H-9137
10-32”x3/4” Bolts (for Mounting Bracket
to Radio) 4 H-91xx
Mounting bracket kit 1 H-9161
Junction Box 1 320-9014
Power Adapter 1 PT-9005
If any items are missing, notify your sales representative. If an item appears to be
damaged from shipment, replace it in its packing material and notify the shipper.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
6
2.3. Service
If the unit ever needs repair service, contact your service provider or Trango
Broadband Wireless for return authorization and shipping instructions.
3. Components and Features
3.1. System Overview
The Access5830 wireless Internet access system is designed for sending and
receiving Ethernet based data traffic where conventional wiring is impractical
or when higher connection speeds are required. The system utilizes robust
spread spectrum technology in supporting both the 5.3 and 5.8 GHz bands to
reduce susceptibility to interference. The basic system consists of one M5830S-
AP-60 access point (AP) and up to 512 M5830S or M5800S series subscriber units
(SUs). The AP uses a proprietary polling mechanism to dynamically allocate
bandwidth to the SUs on an as-needed basis based upon service level
agreement (SLA) rules (CIR and MIR). The system has a maximum service radius
of 20 miles line of sight (LOS) and a burst rate of 10 Mbits/second either
upstream or downstream.
3.2. Access Point Unit
The Access Point Unit coordinates and manages Ethernet packet flow based on
a point-to-multipoint Broadband Wireless Access architecture.
1-Access Point Unit
2-Radome
3-Mounting bolt with
Nuts (4) (built-in)
4-Mounting arm (incl.)
5-"V" brackets (incl.)
6-Ethernet connection
and power
7-Serial connection
(inside access door)
8-LED's display
TX: red
RX: green
RSSI: yellow
1
2
3
4
5
6 7
Front Back
Bottom
8
1-Access Point Unit
2-Radome
3-Mounting bolt with
Nuts (4) (built-in)
4-Mounting arm (incl.)
5-"V" brackets (incl.)
6-Ethernet connection
and power
7-Serial connection
(inside access door)
8-LED's display
TX: red
RX: green
RSSI: yellow
1
2
3
4
5
6 7
Front Back
Bottom
8
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
7
3.3. Junction Box
The Junction Box provides power to AP or SU via unused leads in a Shielded
Twisted-pair (STP) Ethernet cable. The ODU port in the diagram below
connects to AP or SU using 8-conductor STP.
3.4. Subscriber Unit
The Subscriber Unit interfaces with end users via Ethernet devices such as
network switch, hub or a PC network interface card (NIC).
1-
J-Box OK
2-NET port (RJ45)
3-Indicates AP or SU
drawing current
4-ODU port (RJ-45)
5-Power port (20 Vdc)
1
2
3
4
5
1-
J-Box OK
2-NET port (RJ45)
3-Indicates AP or SU
drawing current
4-ODU port (RJ-45)
5-Power port (20 Vdc)
1
2
3
4
5
1-Subscriber Unit
2-Antenna ports (H & V)
3-Mounting bolt and nuts
(4)(built-in)
4-"V" brackets (incl.)
5-Dish antenna
6-Feed arm
7-Feed
8-Flange Ethernet
connection and power
9-Serial connection
(inside access door)
10-LED display
TX: red
RX: green
RSSI: yellow
1
2
3
4
8 9
Front Back
Bottom
Installed on dish
antenna mount
arm
5
71
610
1-Subscriber Unit
2-Antenna ports (H & V)
3-Mounting bolt and nuts
(4)(built-in)
4-"V" brackets (incl.)
5-Dish antenna
6-Feed arm
7-Feed
8-Flange Ethernet
connection and power
9-Serial connection
(inside access door)
10-LED display
TX: red
RX: green
RSSI: yellow
1
2
3
4
8 9
Front Back
Bottom
Installed on dish
antenna mount
arm
5
71
610
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
8
4. Installation
Installation of antennas and radio equipment can be very dangerous. Use
extreme caution when installing equipment near power lines. Electrostatic
Discharge (ESD) protection should be used on any Ethernet cable entry into a
building. APC provides equipment to accomplish this.
4.1. Access Point Mechanical Installation
(1) Mount the arm to
an earth-grounded
mast or secured wall.
U-bolts required for
mast mount
(2) Mount the AP to
the mounting arm (3) Align antenna
4.2. Subscriber Unit Mechanical Installation
(1) Mount the arm to
an earth-grounded
mast or a secured
wall (U-bolts
required for mast
mount).
(2) Assemble the
antenna dish and
feed arm (upper left
picture). The lower
right picture shows
the dish with feed
arm.
(3) Mount the dish
to the mounting
arm.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
9
(5)
Adjust the
mounting arm to
horizontal level.
(6)
Mount SU on the
mounting arm.
(9)
If the AP is not at the
horizon, use the 50 mark
as the offset point and
direct the SU antenna up
or down until the RSSI is
acceptable.
(10)
Slightly adjust the
dish antenna up and
down, left and right
until the strongest RSSI
is reached. Then
tighten down the bolts.
(7)
Connect one end
of two RF cables to
the feed and run
other end through
feed arm to the SU.
(8)
If the AP is at the
horizon, rotate the dish
to the 50 mark.
(4
)
Mou
nt the feed
to the feed arm.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
10
4.3. Wiring
Wiring diagram is shown as below: (please note that the Junction Box is an
indoor device that requires a dry environment. STP stands for shielded
twisted-pair, and UTP for unshielded twisted-pair.)
It is recommended that only 24 AWG shielded twisted pair (STP) be used for the
connection between the junction box and AP or SU. Using the 20 volt power
adapter supplied with the unit, the max Ethernet cable length from the radio
to PC/hub/switch is 100 meters (328 feet). Since power is sent over four of
the unused conductors in the 8 conductor STP, the resistance is reduced
significantly, reducing the voltage drop along the cable.
4.4. Antenna Alignment
The target RSSI for SU with different antenna is shown as follows:
WAN
20 Vdc
110V 50~60 Hz
ATM/IP
20 Vdc
110V 50~60 Hz
20 Vdc
110V 50~60 Hz
ATM/IP
WAN
H
V
AP Wiring
SU Wiring
Wiring when only
connected to 1 PC
STPUTP or STP
STP
STPUTP or STP
(crossover)
UTP or STP
WAN
20 Vdc
110V 50~60 Hz
ATM/IP
20 Vdc
110V 50~60 Hz
20 Vdc
110V 50~60 Hz
ATM/IP
WAN
H
V
AP Wiring
SU Wiring
Wiring when only
connected to 1 PC
STPUTP or STP
STP
STPUTP or STP
(crossover)
UTP or STP
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
11
SU with panel antenna: -70dBm for 3 miles radius with 12dB fade margin
SU with dish antenna: -70dBm for 10 miles radius with 12dB fade margin
The RSSI reading can be obtained by following two methods:
i. View the RSSI reading from a laptop computer (This is a more
accurate reading and the radio has to be in “Off” mode to use the
command below. This is the preferred way to align the antenna.)
1. Telnet into the SU using the new IP address or use a Hyperterminal
session.
2. Read the RSSI level continuously. (rssi <channel #> <polarization>)
Hit space bar and enter to escape.
ii. View the yellow LED indicator in the box (This is an approximate reading
and the radio has to be in SU mode for the LED to function). Activate SU
mode with the command, opmode su y.
1. RSSI > -80dBm - blinking. (lowest strength displayed to LED)
2. RSSI ? -65dBm - solid. (duty cycle increases with signal strength)
An example of antenna alignment with the 24dBi parabolic antenna is shown
below.
The picture above illustrates that you shall down tilt the antenna 22.5° to
point to the horizon.
4.5. Grounding
Attach a ground strap of 12 AWG stranded copper from the mounting bracket to
the earth grounded mast.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
12
It is important to note that the shielded connectors at the junction box are not
connected to the ground on the power adapter to avoid a ground loop. By
using a static protection device on the Ethernet cable at the building entry any
currents induced by lightning or static will be kept outside and routed to earth
ground.
It is recommended that metal conduit be used over the STP if possible to
prevent damage to the STP and add a measure of shielding.
5. Setup
Configuration of the AP and SU units must be done prior to deployment. In this
1.5 firmware release, we introduce this new feature of performing the
configuration via WEB browser (i.e. IE or Netscape).
The default IP address for the radio is 192.168.100.100. Please set up your
computer to the same subnet as the radio (i.e. IP address 192.168.100.110
and subnet mask of 255.255.255.0). Type http://192.168.100.100 on the
address bar of the WEB browser to get into the radio.
5.1. Step by Step Configuration of The AP
The above diagram is the information page that you will see once you get in.
In general, the HTTP interface consists of three sections: navigation (upper
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
13
left, circled in dash), status (lower left, circled), and content (rest of the
page).
?? Navigation: Provide browsing capability to different pages.
?? Status: Provide status (on/off) of the radio
?? Content: Provide contents of a specific page
Configuration Page:
This HTML page is used to set up basic configuration of the AP.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
14
Base ID: This parameter specifies the cluster that the AP belongs to. It is one
of the three key pieces of information, along with active channel, and
subscriber database information for the link establishment between the AP
and other SU’s. All AP’s and SU’s in the same cluster (hexagon) shall have the
same Base ID. The planning of Base ID is illustrated in the diagram below. The
same Base ID can be re-used every seven clusters.
AP ID: This parameter is currently NOT used. The planning of AP ID can be
found in the diagram below.
IP Address: The parameter specifies IP address of the AP. Subnet mask for the
radio is 0.0.0.0, with NO default gateway. Please note that this radio is layer-II
deviceMAC device. The IP address here is for provisioning or network
management via TCP/IP. The radio still passes traffic in spite of the different
settings of IP address.
Baseid = 7
Baseid = 2
Baseid = 3
Baseid = 1
Baseid = 6 Baseid = 4
Baseid = 5
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
61
2
3
4
5
6
1
2
3
4
5
6
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
15
Default Opmode: This parameter controls the state (ap or off) of the radio
after reboot/power cycle. When the parameter is set to ap, the radio will get
into ap mode automatically after reboot/power cycle.
In case you want to interrupt the boot up routine, you can telnet/HTTP into
the radio within 30 seconds time window. As the result, the radio will stay in
off mode.
Switch (Block Broadcast and Multicast Packets): This switch enables/disables
the blocking of Ethernet control packet except ICMP and ARP to reduce the
amount of unnecessary overhead introduced to the wireless link.
Switch (Activate SU to SU Communication): This switch enables/disables the
peer-to-peer feature among SU’s through the AP. Before the switch is turned
on, all SU’s that want to communicate with each other have to be assigned to
the same group. (See SU to SU Group)
Switch (Broadcast Time Stamp to SU): This parameter is NOT used at this
time. Please leave the default unchaged.
Active Channel: This parameter specifies the channel number and polarization
the radio operates on.
Remarks: This parameter documents radio information (i.e. customer name,
address of installation, and so on). Maximum 28 characters can be stored.
Button (Save and Activate Settings): This button will save settings mentioned
above to persistent storage, then active them.
Hyperlink (Add Subscriber): This hyperlink will take you to Subscriber
Database page.
Hyperlink (Activate Opmode): This hyperlink will activate the radio from off
mode to ap mode.
Hyperlink (Reboot System): This hyperlink will reboot the system. The radio
will go into the ap/off state based on the setting of Default Opmode. The
whole process will take 60 seconds.
Advanced Setup Page:
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
16
RF Tx Power: This parameter specifies the power output of the radio,
excluding the antenna gain.
Service Radius: This parameter specifies the distance of the furthest SU this
AP will serve. Based on this information, the AP will determine the maximum
wait time for an SU to response to a poll before it starts to poll the next one.
Note: This parameter has NO effect on the actual coverage radius of the radio.
Channel Table: This table allows you to create your own channel instead of the
manufacturing defaults in the AP. Channels 1 through 11 are fixed and cannot
be changed. Keep in mind that channel width is 20MHz, and the frequency
specified here is the center frequency. For example, channel#1 (5736MHz)
means that channel 1 starts at 5726MHz and ends at 5746MHz. Please
remember that the settable frequency range is (5736MHz, 5836MHz).
RF Rx Threshold: This parameter specifies the receiver sensitivity of the AP.
It is a powerful tool when the radio is in a noisy environment. By default, the
radio’s sensitivity is 82dBm for a 1 x 10 E-6 BER. The higher the threshold
(less negative) is, the less sensitive the radio will be. For example, the radio is
less sensitive with RF Rx Threshold set to 60 than 80.
The setting of this shall be hand-in-hand with the setting of Target RSSI from
SU below.
Increment
al Sensitivity
of the Radio
-65
-70
-75
-60
-80
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
17
Target RSSI From SU: This parameter specifies the target RSSI from all SU’s to
the AP. Based on this parameter, the AP can power level each SU so that it
receives same level of signal strength from all SU’s, regardless far or near.
Please note that when you set the Target RSSI from SU, you need to consider
AP’s rfrxthreshold. If the rfrxthreshold were higher than the Target RSSI From
SU (says 70dBm for rfrxthreshold and 75dBm for Target RSSI From SU), the AP
would never be able to hear from these SU’s.
We must set the Target RSSI From SU 5dB higher than the rfrxthreshold. When
the rfrxthreshold is disabled, the setting of Target RSSI from SU shall be no less
than 75dBm.
MIR Threshold: This parameter serves 2 purposes. 1) Enable/Disable the MIR
Threshold; 2) Specify the MIR threshold.
?? When MIR Threshold is disabled, the AP will serve MIR for all its SU’s.
?? When MIR Threshold is activated, and the network traffic exceeds the
MIR threshold, the AP will only serve CIR for all its SU’s.
?? When MIR Threshold is activated, and the network traffic does NOT
exceed the MIR threshold, the AP will still serve MIR for all its SU’s.
Site Survey Page:
This HTML page is used to verify the RF environment the AP is operated in. To
start the survey, please specify the duration of the test (in minutes), and the
channel polarization, then click the Start Survey Button.
Please note that the radio must be on off mode to do site survey.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
18
The result of the survey will look something like below, “yes” indicates clean
channel while “no” indicates noisy channel. A channel is clean when the Avg
dBm and Peak dBm of a signal is 8dB weaker than the radio’s sensitivity
(rfrxthreshold).
Subscriber Database Page:
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
19
Current Subscriber(s) Table: This table (circled in dash) contains database for
all subscribers this AP serves, one row per SU. This table is empty by default.
Entries for each SU are described below:
SU ID: This parameter is Subscriber ID (1~8190) of an SU. Each
subscriber in a sector shall have a unique ID.
Type: This parameter is service level, regular or priority, of an SU. The
AP will poll priority user more often, thus better network latency as the
result. As the network latency varies based on the number of subscriber
units the AP serves, priority user is guaranteed that the latency is NOT
greater than 100ms regardless of the size of the network.
SU to SU Group: This parameter is peer-to-peer group this SU belongs
to. With the SU to SU switch turned on, SU’s in the same peer-to-peer
group can communicate to each other via the AP. There are totally 15
groups (1~F hexadecimal number) available. Please note that the SU
shall be set to priority user for this feature to improve latency.
CIR: This parameter is the Committed Information Rate (in Kbps) the AP
allocates the SU.
MIR: This parameter is the Maximum Information Rate (in Kbps) the AP
allocates the SU.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
20
Device ID: This parameter is the MAC address of the subscriber unit,
which can be found on the back of the SU.
Modify and Save Button: This button allows you to save the changes on SU ID,
Type, SU to SU Group, CIR, and MIR field to the subscriber database.
Add and Save Button: This button allows you to save the addition of subscriber
to the subscriber database, one at a time.
Delete and Save Button: This button allows you to save the deletion of
subscriber from the subscriber database, one at a time.
Link Control Page:
This HTML page is used to verify the link between an AP and SU after the
minimum setup is done, which includes the Configuration page and the
Subscriber Database page.
Please note that both AP and SU shall be in opmode (ap or su) before getting
into this page. Otherwise, you will receive an error message of “This function
is disabled when opmode is OFF”. To activate the radio, please refer to above
Active Opmode hyperlink under the Configuration Page.
SU Association Status Table: This table shows association status for all SU’s in
the sector that is served by this AP. There are three states in this table that
will be described in details as follows:
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
21
Associated: Indicate those SU’s are currently associated with the AP.
Associating: Indicate those SU’s are associating with the AP.
Power Off: Indicate those SU’s are neither associated nor associating
with the AP.
RF Link Loopback Test: In this test, the AP sends packets to a specified SU,
the SU then echoes those packets back to the AP, and the successful packets on
both directions are calculated. Packet size of 1512 Bytes is used in the test.
To start the test, please specify the SU ID and run time (in minutes), then click
the Loopback Test button. Once the test is completed, the test result is
shown as follows:
SU Ranging/RSSI Test: In this test, as shown in the figure below, following data
will be reported in order. 1) Distance (AP to the specified SU); 2) RSSI (SU-
>AP); 3) RSSI (AP->SU); 4) SU Transmit power; 5) SU temperature. The test will
take 10 seconds. To start the test, please specify the SU ID, then click the
Ranging Test button.
Power Level All Associated SUs: The Powerleveling button underneath this
field is for the AP to start the power leveling process that controls the power
output of all SU’s it serves. The power output of these SU’s depends on the
Target RSSI From SU mentioned on the Advanced Setup Page. This process will
take 10 seconds for each SU.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
22
Command Console Page:
The Command Line Interface can be used here. Type “?” to show all available
commands.
In addition to the Command Console, you can also run these commands via
TELNET or hyper terminal. The setting for hyper terminal is: 9600, 8-N-1, no
flow control. To telnet or hyper terminal into the radio, a password is
required. The defaulted password is “trango”.
Detailed syntax and usage description of these commands can be found in
“User Command Set Reference Manual”.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
23
5.2. Step by Step Configuration of The SU
System Information Page:
Configuration Page:
SU ID: This parameter is Subscriber ID (1~8190) of an SU. Each subscriber in a
sector shall have a unique ID.
Switch (Block Broadcast and Multicast Packets): This switch enables/disables
the blocking of Ethernet control packet except ICMP and ARP to reduce the
amount of unnecessary overhead introduced to the wireless link.
Switch (Auto Scan AP): This switch enables/disables the SU to look for another
AP on a different channel when the previous link with an AP is down.
This redundancy feature is only available when you have 2 AP’s serving the
same sector. See Scan AP Sequence below for channel setting.
Switch (TCP/IP Service for AP): This switch enables/disables the SU to accept
TCP/IP request from the AP side. When the switch is turned on, you can
ping/HTTP/telnet into the SU from the AP side. Please note that this switch
has no effect on the SU accepting TCP/IP request from the SU side when the SU
is in su mode.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
24
Scan AP Sequence: This field specifies the primary channel and secondary
channel the SU uses. The first entry in the sequence is primary, and the next
one is secondary. It works hand in hand with Switch (Auto Scan AP).
Advanced Setup Page:
Channel Table: This table allows you to create your own channel instead of the
manufacturing defaults in the SU. Channels 1 through 11 are fixed and cannot
be changed. Keep in mind that channel width is 20MHz, and the frequency
specified here is the center frequency. For example, channel#1 (5736MHz)
means that channel 1 starts at 5726MHz and ends at 5746MHz. Please
remember that the settable frequency range is (5736MHz, 5836MHz). The
channel table must be matched with the one in the AP.
RF Rx Threshold: This parameter specifies the receiver sensitivity of the SU.
It is a powerful tool when the radio is in a noisy environment. By default, the
radio’s sensitivity is 82dBm for a 1 x 10 E-6 BER. The higher the threshold
(less negative) is, the less sensitive the radio will be. For example, the radio is
less sensitive with RF Rx Threshold set to 60 than 80.
Incremental Sensitivity
of the Radio
-65
-70
-75
-60
-80
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
25
Site Survey Page:
This HTML page is used to verify the RF environment the SU is operated in. To
start the survey, please specify the duration of the test (in minutes), and the
channel polarization, then click the Start Survey Button.
Please note that the radio must be on off mode to do site survey.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
26
The result of the survey will look something like below, “yes” indicates a clean
channel while “no” indicates a noisy channel. A channel is clean when the Avg
dBm and Peak dBm of a signal is 8dB weaker than the radio’s sensitivity
(rfrxthreshold).
Command Console Page:
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
27
The Command Line Interface can be used here. Type “?” to show all available
commands.
In addition to the Command Console, you can also run these commands via
TELNET or hyper terminal. The setting for hyper terminal is: 9600, 8-N-1, no
flow control. To telnet or hyper terminal into the radio, a password is
required. The defaulted password is “trango”.
Important Note: While the SU is in su mode, it does NOT accept any ping or
TELNET from the SU side. In order to do that, you need to power cycle the SU,
and telnet into the SU within the 30 seconds window.
Detailed syntax and usage description of these commands can be found in
“User Command Set Reference Manual”.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
28
6. Site Planning
6.1. Cell Configuration
The system is designed to support a hexagonal six sector cell design, with each
sector containing 1 or 2 AP units. This cell design has a 360 degree coverage
area and can support up to 6000 concurrent subscriber connections. Each
sector uses a single antenna polarization which does not change and is opposite
of the adjacent sectors. Details on assigning channels and polarizations to the
sectors are discussed below.
Other cell architectures are available, but should only be used after careful
planning.
6.2. Service Range Control
Several features allow the control of the service range to prevent interference
from distant cells or other sources, and to allow smaller cells in densely
populated areas. Each is discussed below.
6.2.1. Threshold Control
This feature limits the sensitivity of the receiver section of the radio,
preventing the radio from “hearing” distant transmitters and attempting to
lock to them. This is one of the most powerful ways to avoid interference
from other equipment operating in the same frequency band.
6.2.2. Service Range Control
This feature reduces the time an AP will wait for a response from an SU, which
makes it impossible for SUs located outside the range to establish
communication with the AP. Also, the data throughput will increase slightly as
the service range is reduced. Shorter range has a smaller receive window,
improving resistance to interference. The target RSSI should be adjusted if this
parameter is changed from the default. Also special attention must be paid to
the antenna height used versus the service range.
6.2.3. Power Leveling
RF power leveling is a feature that is typically found in more elaborate mobile
systems such as cellular CDMA networks. It does have great benefits for
wireless broadband access systems and therefore is included in the Access5830
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
29
design. Using this feature, all SUs have their RF power output adjusted until
the signal strength for each SU as received in the AP is roughly the same.
The key advantage is that the SUs close to a basestation AP on channel #1 that
have their power turned down will not cause interference to an AP on channel
#2 at the same basestation and vise-versa. Cell planning is made much easier
since the adjacent channel interference is reduced significantly.
When the SU is powered on and begins to associate with an AP, the AP will run
the unit through a routine in which it increases or decreases the SU RF power
until the received power at the AP is as close to the target RSSI as possible.
6.3. Channel Flexibility
Since the AP channels may be changed remotely and the SU may be set up to
automatically scan a programmable set of channels and polarizations, changing
the channel and polarization of a given sector is very simple and may be done
at any time with a minimum of down time.
There are several rules that should be observed regarding channel planning.
A minimum of 20 MHz should be used for channel spacing on the same
polarization.
In the same sector always use a spacing of at least 26 MHz between channels
for each AP if two or more APs are covering the same area.
Only reuse frequencies for APs on opposite polarizations that are mounted 180o
relative to each other in the cell and well isolated. Verify that the APs do not
interfere with each other by running “cf2cf” on one AP while running site
survey on the other. Increase separation distance if necessary, add physical
shielding, or reduce each AP’s RF power output.
Always align APs in adjacent cells so that they do not face each other directly.
6.4. Channel Planning 5.8 GHz Band
Single Sector
1, 3, 5 V
and
2, 4,6 H or 1, 3, 5 H
and
2, 4,6 V
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
30
Six Sector (6 AP’s)
Six Sector with (12 AP’s)
1V
3H
5V
2H
4V
6H
1V
3H
5V
2H
4V
6H
1V
3H
5V
2H
4V
6H
1V
3H
5V
2H
4V
6H
1V
3H
5V
2H
4V
6H 1V
3H
5V
2H
4V
6H
1V
3H
5V
2H
4V
6H
1, 4 V
2, 5 H
3, 6 V1, 4 H
2, 5 V
3, 6 H
1, 4 V
2, 5 H
3, 6 V1, 4 H
2, 5 V
3, 6 H
1, 4 V
2, 5 H
3, 6 V1, 4 H
2, 5 V
3, 6 H
1, 4 V
2, 5 H
3, 6 V1, 4 H
2, 5 V
3, 6 H1, 4 V
2, 5 H
3, 6 V1, 4 H
2, 5 V
3, 6 H
1, 4 V
2, 5 H
3, 6 V1, 4 H
2, 5 V
3, 6 H
1, 4 V
2, 5 H
3, 6 V1, 4 H
2, 5 V
3, 6 H
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
31
6.5. Path Loss Planning
This section addresses the planning of the radio link parameters between the
AP and SU. The Access5830 system is designed for line-of-sight (LOS) AP to SU
links up to 20 miles using the M5830S-SU-EXT with 31 dBi dish antenna with a
fade margin allowance of 12 dB. Using the M5830S-SU ( with internal antenna),
the LOS range is 7 miles for a 8 dB fade margin.
The link budget is a summation of all system component gains and losses to
determine if sufficient signal is present at the radio antenna for the link to
perform properly. The link budget is calculated for each direction of the link.
The general equations are as follow:
Required system gain = Free space loss (FSL) + fading margin allowance(FM)
Calculated system gain = Transmit antenna gain (dB) + transmit power (dBm)
+ receive antenna gain receiver sensitivity (dBm).
For the link to work properly Calculated system gain must be greater than or
equal to the Required system gain.
Example:
For the M5830S AP to SU (with dish) 20 mile LOS link, the FSL is 138.11 dB
from 6.5.1 below. We set the fade margin in this case at 12 dB to allow for
rain only per Section 6.5.2 below.
The total required system gain is then 138.11 + 12 = 150.11 dB
AP to SU:
Transmit Antenna: 14 dB
Transmit Power: +22 dBm
Receive Antenna Gain: 31 dB
Receiver sensitivity: -83 dBm
Calculated System Gain = 150 dB
SU to AP
Transmit Antenna: 31 dB
Transmit Power: +22 dBm
Receive Antenna Gain: 14 dB
Receiver sensitivity: -83 dBm
Calculated System Gain = 150 dB
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
32
Summary: The link will work since the calculated system gain is equal
to the required system gain.
Note: Connector and cable losses are incorporated into the antenna gains
above for simplification.
NOTE: The sensitivity specification of the M5830S radio is specified to be 83
dBm typical for a 1E-6 Bit Error Rate. This specification, however, will vary
with the size of the Ethernet packet being transmitted. For small packets (ex.
64 bytes) such as URL requests, the sensitivity of the receiver section is about
-87 dBm. For large packets (i.e. 1600 bytes), the sensitivity is about 83 dBm
worst case. This characteristic improves the fading margin for smaller packets.
The packet size is determined by the Ethernet MAC layer and cannot be
controlled or fragmented in the radio.
6.5.1. Free Space Loss (FSL)
Any RF signal will be attenuated as it travels through space according to the
following equation:
Loss fsl = 92.4+ 20log(F)+20log(R)
Where: F= Frequency in GHz
R = range in km
Example:
For a 20 mile path at 5.8 GHz, the free space loss would be:
Loss = 92.4+20log(5.8) + 20log(20/.6) dB
Loss = 138.11 dB
The system gain must be greater than this loss for the link to work.
6.5.2. Signal Fading Factors
The following factors will add losses to the FSL loss and must be accounted for
by adding fade margin
6.5.2.1. Fresnel Zone Fading
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
33
For a link to truly be line-of-sight, no objects such as buildings, cars, etc. or
the ground may be within a certain height perpendicular to the line of sight
path called the first fresnel (pronounced fray-nell) zone. This height of the
fresnel zone H (in feet) is specified by the equation below.
H = 43.3 x sqrt(D/(4xF))
where D = distance in miles between antennas
F = Frequency in GHz
Example:
For a 10 mile link at 5.8 GHz, the height of the Fresnel zone is
H = 43.3 x sqrt(10/(4x5.8))
H = 28.43 feet
If 60 percent of the fresnel zone is free from obstructions the link will
generally behave as a line of sight link.
Therefore, the direct path must have .6 x 28.43 = 17 feet of clearance around
it to achieve line of sight performance. Each antenna must be mounted this
high above the ground plus the earth bulge height as described below.
6.5.2.2. Earth Bulge
For long links the curvature of the earth will may block the line of sight path
unless the antennas at both ends of the link are positioned high enough above
the ground. This height must be added to the fresnel zone height for each
antenna.
H = D2/8
Where: H = Earth bulge height in feet
D=distance between antennas in miles
Example:
For a 10 mile link, H =102/8 = 12.5 feet
6.5.2.3. Foliage Loss
When trees and plant foliage are in the transmission path, the link is
considered non-LOS and additional signal loss will be present. Since the
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
34
seasonal density and moisture content of the plants, and other factors such as
wind may change the losses, care must be used when planning a link through
this type of environment.
FCC OET Bulletin 70 gives a generalized equation for foliage loss which is
presented here as a guideline only. It is imperative to verify that the system
has sufficient fade margin for proper operation by conducting a field test
when non-LOS links are involved.
Loss = 0.2 F 0.3 x R 0.6
Where: F= Frequency in MHz
R= Depth of foliage transversed in meters
Example:
For 5.8 GHz and 10 meters of foliage depth (to estimate a typical distance of
aiming through several trees towards a tower):
Loss = 0.2 x 5800 0.3 x 10 0.6 = 10.7 dB
A fade margin of 12 dB in this case appears to be sufficient, but it is prudent to
add more fading margin (on the order of 10 dB) to account for other signal
losses and verify the RSSI/throughput performance at the customer premises.
This effectively reduces the range obtainable.
6.5.2.4. Signal Loss due to Rain
At 5.8 GHz, attenuation due to rain is roughly .25 dB/km for a rain rate of 100
mm/hr and .60 dB/km for a rain rate of 150 mm/hr per FCC OET bulletin 70.
For a 10 mile link the total loss would be :
For a 100mm/hr rain event, Loss = 0.25 dB/km X 1 km/0.6mile x 10 miles =
4.16 dB
For a 150mm/hr rain event, Loss = 0.60 dB/km X 1 km/0.6mile x 10 miles =
10.0 dB
6.6. Availability
Availability of the link represents the percentage of the time that the link is
working at or below a given bit error rate (BER). The table below shows the
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
35
percentage of time the link is available versus total outage time per year
(source: FCC OET Bulletin 70).
AVAILBILITY OUTAGE TIME PER YEAR
99.9% 9 hours
99.99% 1 hour
99.999% 5 minutes
99.9999% 30 seconds
Availability is largely based upon the fade margin allowance specified versus
the signal fading due to multipath, foliage, and weather effects. The fade
margin must be greater than all signal fading losses for the link to be
“available”.
If the fading losses are greater than the fade margin the link is considered to
be “unavailable”, although a gradual degradation of the link quality will
generally occur instead of the link being completely disabled.
For LOS links, availability is based mainly upon weather effects.
If the fade margin is greater than these losses, a link will be available during
these rain events assuming no other impairments to the link have occurred such
as misaligned antenna, etc.
The M5830S-SU-EXT with 31 dBi dish is designed to operate with a maximum
radius of 20 miles using a fade margin of 12 dB, so it would still operate with
no degradation during the example events discussed in 3.4.2.4 above.
In the continental United States, the southeastern part of the country is
subject to an average of 5.26 minutes per year where the rain rate exceeds 150
mm/hr. If we assume that the fading losses will be greater than 12 dB during
this time, the M5830S link will be “unavailable” for that time unless the fade
margin is increased. This corresponds to an availability of 99.999%.
6.7. Site Survey
After choosing the appropriate fading margin allowance and AP configuration,
it is important to conduct a site survey. Both the AP and SU units have several
commands to allow measurement of the RF spectrum and assist in the selection
of channels for best operation. The basic procedure is as follows:
Install an AP in the desired location, aligned towards the desired coverage
area.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
36
With opmode off, run the “survey” command from the ss subdirectory. It may
be useful to run this command for one entire day or run several passes during
the course of a day to determine when interference may be occurring.
Analyze the results which show which channels and polarizations have the
lowest received signal strength, indicating they are good candidates for usage.
Once a channel and polarization have been selected verify that the expected
signal strength levels are being achieved with SUs in the coverage area.
Run the “cf2cf” test with an SU in the coverage area. Verify that there are no
packets being lost except by the AP. Typical numbers vary with packet size and
transmission distance, but as an example, with 1600 byte packets at under 1
mile, the numbers of packets received by both ends should be about 340. The
AP should detect about 320 good packets. The HR and CR should all be zero.
This indicates an error free link.
Adjust the RSSItarget, service range, rfrxthreshold as appropriate.
Activate service by changing opmode to AP.
Another useful command to determine if any M5800S series APs are active in
the area is the “apsearch” command. It can be run from either an AP or SU
and will force the radio to listen for packets being transmitted from an AP,
then report the results with signal strengths. See Command Set Reference
Manual for more information.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
37
7. Administration Tools
Prior to the availability of SNMP, network management is done via the
combination of HTTP and Telnet. The philosophy is to manage all SU’s through
their serving AP.
7.1. Network Security
Since the use of password in an HTML page is not safe, we eliminate the need
for password login for the HTTP access. To maintain the network integrity,
there is a switch (sw 3) built-in to disable/enable the HTTP access via telnet or
serial.
7.2. Subscriber Database Management
To load a full database of SU entries into the AP database, you need to create a
subscriber database in ASCII text file format. As shown below, each row
represents all information for one SU. Each column is an information field,
which includes: SU ID, SU to SU group, service level, CIR, MIR, and MAC
address.
0001 0001 3000 9999 0001 de01 0203 --- Subscriber 1
0003 0011 5000 9999 0001 de04 0506 --- Subscriber 4
0004 0011 0512 9999 0001 de01 0203
0000 0000 0000 0000 0000 0000 0000 --- End of file
indicator
---- ---- ---- ---- --------------
| || | | |
| || | | |---------- MAC Address
| || | |-------------------- MIR (Kbps)
| || |------------------------- CIR (Kbps)
| ||----------------------------- Service level
| | (5: priority user)
| | (1: regular user)
| |------------------------------ Peer-to-peer group #
| | (1 to F in hex)
|----------------------------------- SU ID (1~8192)
1. telnet into the AP, run command tftpd on to enable tftp process
2. tftp the file to the AP
3. telnet into the AP
4. Run command sudb dload to load and activate the database
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
38
5. Run command sudb view to verify the database entries
6. Run command updateflash sudb to write the database to non-volatile
memory.
8. Troubleshooting
Below are some possible sources of no link established:
Incorrect Ethernet wiring (crossover vs straight through)
Use straight through if connecting the junction box to the SU or AP. Use an 8
conductor 24 AWG straight through Cat 5 STP cable for junction box to switch
connections. Use a crossover cable for junction box to PC NIC connections.
Power not present due to using only 4 conductor STP
Verify the “ODU” LED illuminates on the junction box. If not, check the cable
from the junction box to the AP or SU It must be 8 conductor Cat 5 24 AWG
STP. Also verify the connection of the 20 Volt power adapter to the junction
box. If connected properly, the “POWER” LED will illuminate, regardless of the
connection status to the AP or SU.
Ethernet cable too long from Junction Box
The max length is 100 meters (328 feet) from the AP or SU to the Junction Box.
No entry of SU in database
Check SU database in AP and correct. Double check the MAC address of the SU
as printed on the label on the back of the unit.
Base ID incorrect in SU
The baseid in the AP and the SU must be the same for the link to be
established.
Opmode off
Opmode must be turned on for both the AP and the SU for the link to be
established.
Service Range setting in AP too low
Check and correct if necessary.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
39
Receive RSSI threshold in AP too high
Reduce the threshold as appropriate.
SU Scan table setup incorrectly
Check channels and polarizations in scan table in SU. Verify that auto scanning
is turned on in SU.
Antenna alignment
Verify antenna has not been inadvertently moved out of alignment.
SU firmware out of date
Check firmware-hardware cross-reference.
Failed to update the system settings after making changes.
Make changes again and save system settings.
Cannot Ping the SU
Verify wiring to PC or switch. Verify subnet mask on PC is set correctly. Make
sure that opmode is “off”.
Real time clock not working
Open the cover of the radio (12 screws) and replace the Battery with a model
BR1225 lithium battery. Reset the time and date. Battery life is typically 5-10
years.
Telnet connection lost
The radio will disconnect the telnet session after 2 minutes if there is no
activity from the remote terminal. Also, the telnet firmware in the AP and SU
radios is a reduced implementation that may lose connection when the routing
of packets changes during a session, as may happen over long geographical
distances in some cases. The radio is unaffected in this case. Simply reconnect
to the radio.
Radio reboots by itself
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
40
Both the AP and SU will reboot approximately every 41 days to reset the
internal counters, making the link unavailable for about 15 seconds. While this
will usually not be noticeable, it is recommended that the administrator
schedule reboots during off-peak hours to minimize effects on customers. A
scheduled reboot will prevent the automatic reboot from occurring as long as it
is done at about a 30 day interval.
Any other type of reboot may indicate insufficient input voltage or overheating
of the unit.
Erratic behavior of unit
Under out of spec temperature extremes, the unit may reboot or behave
erratically. Verify the temperature of the unit in question. Use the temp
command to obtain the temperature inside the unit.
Possible sources of degraded performance and corrective action:
Interference at the SU
If interference is suspected, run the “testrflink” command to verify that
packets are being corrupted. If packets are being lost, some potential
remedies to the problem are: Try a different channel or polarization, re-orient
the SU antenna, look for sources of RF interference in the vicinity of the SU and
remedy.
Interference at the AP
If interference is suspected, run the “testrflink” command to verify that
packets are being corrupted. If packets are being lost, some potential
remedies to the problem are: Change the receive threshold on the AP, Reduce
the service range, try a different channel or polarization, re-orient the AP unit,
Look for sources of RF interference in the vicinity of the AP and remedy.
Potential sources are: Self interference from APs spaced too close to the
problem unit, intermodulation from high power out-of-band transmitters, and
in-band Interference from other unlicensed equipment.
Also grounding of the AP may be the problem. Make sure that the AP is well
grounded and that the Ethernet cable is shielded.
Poor signal strength
Verify that antenna alignment has not changed or that the signal path has not
become blocked by foliage or vehicles. Wet foliage may create a problem as
well. Also, verify that the antenna connectors are tight and installed correctly
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
41
(V and H). The fade margin allowance may be too low. The rssi should read
more than 75 dBm under normal conditions with default settings and errors
can be expected below 83 dBm.
Poor data throughput
Run “testrflink” command to check for lost packets. If the tests are ok, verify
the third party FTP program buffers and PC settings are set to the max size for
a broadband connection and verify network card operation. Check the SU
database entry for typographical errors. MIR threshold may also be on and set
too low.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
42
9. Theory of Operation
This section discusses the theory of operation of the hardware and software
portion of the AP and SU and is intended as a guide to assist the reader in
understanding the system.
9.1. Hardware
9.1.1. Direct Sequence Spread Spectrum
By utilizing the same technology used for secure military communications,
robustness against interference from other radio equipment is obtained. The
method of spreading the data used by the M5830 product is similar to the
field-proven technology used for wireless LANs.
The system will operate essentially error-free even with peak signal-to-
interferer ratio of only 8.4 dB, allowing operation in noisy areas where other
non spread spectrum modulation techniques may fail. Some technologies
require peak signal-to-interferer ratios of at least 20 dB, which means that the
interfering signal must be 20 dB less than the desired signal or data loss will
occur.
9.1.2. Antenna Technology
Both the AP and SU use proprietary patch antenna technology that allows high
gain in a small package, and is electronically switchable between horizontal
and vertical polarization.
Trango Broadband chose linear polarization over circular polarization based on
field results in high RF interference environments. Most deployed equipment
uses linear polarized antennas in the 5.3 and 5.8 GHz bands, for which circular
polarization only can offer a 3 dB rejection. Linear antennas can offer
rejection of 15 to 20 dB over those same circular antennas.
9.2. Software
One of the major advantages of the Access5830 system is the ability of
the AP to handle multiple SU connections and share the 10 MBPS data
pipe efficiently according to provisioning rules set up by the
administrator.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
43
The AP unit acts as a hub in a star configuration wireless multipoint
network supporting up to 512 subscriber units. The functional
description of the protocol is as follows:
The AP unit, hardwired to a Point of Presence, polls each subscriber unit
SU in a round robin format to determine if the SU has data to transfer.
The SU only transmits the data “upstream” to the AP when the AP gives
authorization via a transmit grant. The SU parses every “downstream”
data packet from the AP and identifies packets intended for it.
Normally the administrator will first add the MAC address and ID number
of the SU to the user database of the AP with which the SU will
associate. Then, the SU will be installed by a technician at the
subscriber premises.
When power is first applied to the SU, it will scan all the channels in its
scantable, searching for an AP that is sending transmit grants for the SU.
The SU will then stop on that channel and respond to the AP using
maximum RF power. Before the AP can add the SU to the polling list, it
must authenticate the SU by verifying the MAC address, and performing
a ranging operation to the SU. This process involves sending a special
command to the SU and getting an instantaneous reply from the SU.
Upon successfully locating and ranging the SU, The AP will then add the
SU to the normal polling list and level the RF transmit power level from
the SU to set a good signal-to-noise ratio at the AP.
The AP uses several parameters to determine how often each SU is
polled for data, and the conditions of any data transfer, as follows:
1) Committed Information Rate (CIR)
2) Maximum Information Rate (MIR)
3) Priority
4) Poll response timeout
All the above parameters are set in the AP by the system administrator
and cannot be controlled at the SU.
It should also be noted that the MAC table located in the AP is dynamic and
stores up to 2000 entries. There is no limitation on the number of IP addresses
or hardware devices that an individual SU may have physically connected to it.
Trango Broadband Wireless Access5830™ User Manual
44 User Manual Rev 1
Warning Antenna Installation Instructions: FCC RF Exposure Limits
The M5830S-AP-60 and M5830S-SU transmitters, used in conjunction with 13/14 and
17/18 dBi gain antennas, are to be employed in point-to-multipoint applications only.
The installer shall mount all transmit antenna so as to comply wit the limits for human
exposure to radio frequency (RF) fields per paragraph 1.1307 of the Federal
Communications Commissions (FCC) Regulations. The FCC requirements incorporate
limits for Maximum Permissible Exposure (MPE) in terms of electric field strength,
magnetic field strength, and power density.
The M5830S-AP-60 and MS5830S-SU transmitters are intended to be installed in
customer premises areas. In addition, the following label wording is required to be
placed on the subscriber unite antenna.
Caution: To comply with FCC RF exposure requirements, antennas used for this device
must be installed to provide a separation distance of at least 20cm from all persons to
satisfy RF exposure compliance.
This label will be placed on the antenna or on the device so that it is easily visible at a
distance of 1 meter.
Antenna manufacturer-supplied installation instructions for specific models generally
contain information regarding antenna mounting, aiming, lightning protection, and other
relevant factors. In addition to meeting these requirements, the antenna system installer
is responsible for installing antennas so that they comply with FCC RF exposure
requirements. The FCC RF exposure requirements at a given location are based on the
sum total of contributions from all radio sources. For M5830S Series system antennas
placed in close proximity to other transmitters (e.g. on a shared rooftop or tower
installation), installers shall take steps to insure that MPE guidelines in 1.1307 of the
Rules continue to be met with the inclusion of the contribution from the new antenna.
Further information and guidance can be found in FCC Bulletin OET 65, available for
download at http://www.fcc.gov/oet/rfsafety/.
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
52
APPENDIX: FIRMWARE HARDWARE CROSS
REFERENCE
Hardware
Model Firmware
Release Firmware File Release Date
M5830S-AP-60
Rev 1 Original
Release V1.0
Main: AP_1p5H8002xxxxxxxxxx.S19
12/15/02
FPGA: Vxxxxxxx.HEX
Checksum:
TBD
M5830S-SU
Rev 1 Original
Release V1.0
Main: SU_1p5H0002Dxxxxxxxx.S19
12/15/02
FPGA: Vxxxxxxx.HEX
Checksum:
TBD
M5830S-SU-
EXT Rev 1 Original
Release V1.0
Main: SU_1p5H0002Dxxxxxx.S19 12/15/02
FPGA: Vxxxxxxx.HEX
Checksum:
TBD
Trango Broadband Wireless Access5830 User Manual
User Manual Rev 1
53
Hardware
Model Firmware
Release Firmware File Release
Date

Navigation menu