Trango Systems ATLAS4900 User manual

Ffirm
ATLAS4900
Point-to-Point
Wireless OFDM Ethernet Bridge
USER MANUAL
June, 2007
Revision 1.3

Table of Contents Trango
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page ii
Table of Contents
Preface.................................................................................................................................................................. iii
FCC Information.......................................................................................................iii
Warranty Information ...............................................................................................iii
Chapter 1 Overview................................................................................................................................................3
Range vs. Throughput ..............................................................................................3
System Contents ......................................................................................................3
Location of Serial Number & MAC Address.................................................................. 3
Location of RJ-45/LED Port........................................................................................ 3
Chapter 2 Getting Started .......................................................................................................................................3
Connections and Power.............................................................................................3
Configuration Tools...................................................................................................3
Troubleshooting Ethernet Connections.......................................................................3
System Information (sysinfo) Page ............................................................................3
Chapter 3 Configuration .........................................................................................................................................3
Key Concepts ...........................................................................................................3
Essentials to Establish a Wireless Link........................................................................3
Master Unit Configuration..........................................................................................3
Remote Unit Configuration ........................................................................................3
Establishing a Wireless Link....................................................................................... 3
Changing IP Address.................................................................................................3
LEDs........................................................................................................................3
RF Link Loopback Test (linktest command).................................................................3
Link Speed & Power Settings..................................................................................... 3
Command Reference Listing...................................................................................... 3
Chapter 4 Deployment & Installation.....................................................................................................................3
Site Selection ........................................................................................................... 3
Site survey............................................................................................................... 3
Channel Planning...................................................................................................... 3
RSSI Command and Antenna Alignment..................................................................... 3
Mounting Hardware .................................................................................................. 3
Grounding................................................................................................................ 3
Cabling and Weather Considerations..........................................................................3
Weather Sealing on EXT Model..................................................................................3
Weatherizing............................................................................................................ 3
Chapter 5 SNMP ....................................................................................................................................................3
Chapter 6 Firmware Upgrade Procedure ................................................................................................................3
Appendix A Using the HTTP Interface...........................................................................................................3
Appendix B Specifications..............................................................................................................................3

Preface
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page iii
Preface
This manual covers the basic configuration and installation of the ATLAS4900 Wireless Point to Point Broadband
System, and applies to the following radio part numbers:
P4900M-INT-18 Atlas4900-INT18 point-to-point radio with integrated 18 dBi panel antenna
P4900M-INT-22 Atlas4900-INT22 point-to-point radio with integrated 22 dBi panel antenna
P4900M-EXT Atlas4900-EXT point-to-point radio with external h/v polarization antenna connectors
The ATLAS4900-INT-18 and –INT-22 products consist of two radios which have either internal 18 or 22 dBi antennas
with electronically selectable polarization. The –EXT radios are designed for use with external dish antennas. All three
products contain universal power adapters and mounting hardware for a pole. This device requires professional
installation and a license.
FCC Information
This device complies with Part 90 of the FCC Rules and Regulations.
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 any 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 a power 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: NCYP4900M
IMPORTANT NOTE:
Intentional or unintentional changes or modifications must not be made unless under the express consent of the party
responsible for compliance. Any such modifications could void the user’s authority to operate the equipment and will
void the manufacturer’s warranty. To comply with FCC RF exposure requirements, the following antenna installation and
device operating configurations must be satisfied. The antenna for this unit must be fixed and mounted on outdoor
permanent structures with a separation distance of at least two meters from all persons. Furthermore, it must not be co-
located or operating in conjunction with any other antenna or transmitter.
Warranty Information
Radios from Trango Broadband Wireless are warranted for one year from date of purchase. Please see
www.trangobroadband.com for a complete description of warranty coverage and limitations.

Overview
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 1
Chapter 1 Overview
The ATLAS4900 is a point-to-point (PtP) wireless Ethernet transmission system which provides network connectivity at
speeds up to 45 Mbps depending on the transmission distance and noise floor. The Atlas4900 utilizes OFDM technology
and is designed for use in long range backhaul and wide area data networking applications. The Atlas system is
comprised of the following items:
1) P4900M-INT18, -INT22 or -EXT (user-configured as Master Unit)
2) P4900M-INT18, -INT22 or -EXT (user-configured as Remote Unit)
3) Two 24 Volt power adapters for use with 100 to 240 VAC, including various plug adapters
4) Two Power over Ethernet Junction Boxes
5) Two Port plug covers
6) Mounting hardware
The Atlas4900 system consists of two P4900M radio units and uses a common hardware/firmware platform for
each end of the wireless link. Users are required to specify one unit type as master unit (MU) and one unit as
remote unit (RU). The hardware consists of a high gain dual polarized panel antenna with the radio portion
integrated into a cast aluminum case on the back of the antenna, or as a radio unit with external antenna ports. The
unit utilizes Power-over-Ethernet (PoE) and is designed for outdoor environments. The cable entry point can
accommodate both Shielded twisted pair Cat5 (STP) and unshielded twisted pair Cat5 (UTP), with the addition of
conduit for tower mounting.

Overview
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 2
Range vs. Throughput
The following table shows approximate maximum ranges (at recommended fade margins) achievable with the
ATLAS4900 system using various antenna configurations. Longer ranges are achievable, but will result in lower
fade margins.
Atlas 4900-INT-22 Range & Throughput
Antenna 3 miles 16 miles 30 miles
Integrated 22 dBi
15” Flat Panel
45 Mbps
(10dB fade margin)
20 Mbps
(10 dB fade margin)
5 Mbps
(11 dB fade margin)
Line-of-sight range
Atlas 4900-INT-18 Range & Throughput
Antenna 4 miles 6 miles 13 miles
Integrated 18 dBi
8” Flat Panel
30 Mbps
(10 dB fade margin)
20Mbps
(10 dB fade margin)
5Mbps
(10 dB fade margin)
Line-of-sight range

Overview
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 3
System Contents
Each ATLAS4900-INT kit consists of two P4900M-INT radios, two power-over-Ethernet (PoE) injectors, two AC
adapters, port covers, and mounting hardware. A dual-polarized integrated antenna is located behind the radome of
the P4900M-INT.
ATLAS4900-INT22
2X Radio w/ Internal Antenna
2X Pole Brackets
2X U-Bolts
2X
Power-over-Ethernet
Injectors
2X Universal
Power Supplies
8X Mounting Bracket
Kepnuts
2X Mounting Brackets
2X Silicone Port Plug
2X Port Plate
Location of Serial Number & MAC Address
The serial number and MAC address label can be found on the back of each radio. The serial number and MAC address
is also provided on the system information screen.
Trango Broadband Wireless
P4900M- INT22 Rev. A
S/N: 000001420
MAC: 00 01 DE 00 02 F2
FCC ID: NCYP4900M
Canada: XXXXXXXXXX
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES: OPERATION IS
SUBJECT TO THE FOLLOWING CONDITIONS: (1) THIS DEVICE MAY NOT
CAUSE HARMFUL INTERFERANCE, AND (2) THIS DEVICE MUST ACCEPT
ANY INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

Overview
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 4
Location of RJ-45/LED Port
The RJ-45 connector, diagnostic LEDs, and reset button are located at the bottom of the radio. Functionality of the LEDs
is described later in this text. The reset button resets IP address and password to factory default. Hold the reset button
down for 5 seconds (until amber lights flash) while unit is powered on to reset the unit.
Reset Button

Getting Started
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 5
Chapter 2 Getting Started
It is recommended that you first provision and test your the radios on the bench before deploying them in the field. This is a
particularly useful exercise for the novice user.
Connections and Power
•Connect a Cat-5 (straight through) Ethernet cable (we recommend shielded twisted pair) between the ODU (out door
unit) port of the J-box and the RJ-45 connector on the radio. Note that this cable will carry power-over-Ethernet
(PoE).
•If connecting to a COMPUTER, use a Cross-Over Ethernet cable from the NET port of the J-box to the computer’s
Ethernet port.
If connecting to a HUB, SWITCH, or ROUTER, use a Straight-Thru cable.
•Plug the AC adapter into an AC outlet.
CAT-5
STRAIGHT-THRUCABLE
24 VDC
POWER SUPPLY
AC POWER
ATLAS
MASTER UNIT OR REMOTE UNI
T
POWER-OVER-ETHERNET
J-BOX
INDICATESPOWERTORADIO
INDICATESPOWERTOJ-BOX
CAT-5
NETWORK
OR
COMPUTERGROUND
LUG
VOLTMETER TEST LEADS
VOLTMETER TEST LEADS
USE STRAIGHT-THRU CABLE
IF TO HUB, SWITCH, OR ROUTER
USE CROSS-OVER CABLE
IF TO COMPUTER
Both green LEDs on the J-box should be lighted, indicating power is present at the Power-over-Ethernet box as well as at the
radio.
You are now ready to configure the radio via the Ethernet port. The Radio Power LED may take several seconds before
lighting. The radio requires approximately 45 seconds to complete its boot process.

Getting Started
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 6
Configuration Tools
ATLAS4900 radios can be configured using either the Command Line Interface (CLI), or the Web Browser (HTTP) interface.
Although both methods are comprehensive and powerful, the CLI method provides slightly more functionality.
This text covers configuration through the CLI. For HTTP configuration please see Appendix A.
Telnet
Open a command prompt (DOS) session on your PC. Open a Telnet session by typing:
telnet <ip address of radio>
Example:
C:>telnet 192.168.100.100
Note: All Trango radios are configured at the factory with a default IP address of 192.168.100.100.
You will be greeted with current hardware and firmware information and prompted for a password. Type in the password and
press enter. The factory default read/write password is trango.
Welcome to Trango Broadband Wireless, Atlas PtP-P4900M 1p0r3D06100301
Password:
Login as read/write.
#>
Note: Type help for a listing of all CLI commands. Type help [<command>], for the syntax of a particular
command.
Troubleshooting Ethernet Connections
If you cannot telnet into the radio or open an HTTP browser session, check your cable connections to ensure proper use
of cross-over vs. straight-through cable, and ensure your PC’s subnet is routable to the radio’s IP address.
System Information (sysinfo) Page
To display system configuration and status information type the command sysinfo.
The sysinfo screen is divided into 7 sections (0 –7)
Section Description
0Hardware/Firmware versions & system uptime (since reboot)
1Mac, serial number, and IP configuration information
2Opmode, RF info, speed, and peer connection status
3RF channel table
4Region Code information denotes which channels and power limits are available based on region
code of the radio. Region code is set by the factory and can not be altered by the user.
5ARQ status, encryption, Auto-rate shift, remarks, and LED RSSI function
6Ethernet TX/RX statistics.

Getting Started
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 7
Sysinfo Example:
#> sysinfo
********************************* 0 *********************************
[Model] P4900M
[Unit Type] MU
[Hardware Version] 4900
[Firmware Version] 1p0r3D06100301
[System Up Time] 0 day(s) 01:21:16
********************************* 1 *********************************
[MAC] 00 01 DE 50 91 29
[S/N] 5280041
[IP] 192.168.100.100 [Subnet Mask] 255.255.255.0 [Gateway] 0.0.0.0
********************************* 2 *********************************
[Opmode] off [Default Opmode] off
[Active Channel] 1 h [Freq] 4950 MHz
[Speed] 24 Mbps [Tx Power] 0 dBm [Power Range] 8..17 dBm
[Peer ID] DE1B7850 [Status] disconnected [RSSI] dBm
[Peer IP Config] n/a
********************************* 3 *********************************
Channel Table: (MHz, n/a: not available in current area)
[Ch#01] 4950 [Ch#02] 4980 [Ch#03] 5000 n/a [Ch#04] 5000 n/a
[Ch#05] 5000 n/a [Ch#06] 5000 n/a [Ch#07] 5000 n/a [Ch#08] 5000 n/a
[Ch#09] 5000 n/a [Ch#10] 5000 n/a [Ch#11] 5000 n/a [Ch#12] 5000 n/a
[Ch#13] 5000 n/a [Ch#14] 5000 n/a [Ch#15] 5000 n/a [Ch#16] 5000 n/a
[Ch#17] 5000 n/a [Ch#18] 5000 n/a [Ch#19] 5000 n/a [Ch#20] 5000 n/a
[Ch#21] 5000 n/a [Ch#22] 5000 n/a [Ch#23] 5000 n/a [Ch#24] 5000 n/a
********************************* 4 *********************************
[Area Code] 0
RF Band #1 (4950..4980 MHz) 8..17/17/17/17/15 dBm
********************************* 5 *********************************
[Tx MIR] 50000 Kbps
[ARQ] on
[Encrypt] off [Key] 0011 2233 4455 6677 8899 AABB CCDD EEFF
[Auto Rate Shift] off
[RSSI LED] on
[Remarks] Remarks
********************************* 6 *********************************
[Eth In] 31,117 bytes [Eth Out] 54,391 bytes
[RF In] 39,574 bytes [RF Out] 54,391 bytes
[ARQ Retransmission] 1 pkts
Success.
#>

Getting Started
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 8
To view only a particular section of the sysinfo screen, type sysinfo followed by the desired section number.
Example:
#> sysinfo 2
********************************* 2 *********************************
[Opmode] off [Default Opmode] off
[Active Channel] 1 h [Freq] 4950 MHz
[Speed] 24 Mbps [Tx Power] 0 dBm [Power Range] 8..17 dBm
[Peer ID] DE1B7850 [Status] disconnected [RSSI] dBm
Success.
#>

Configuration
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 9
Chapter 3 Configuration
Key Concepts
Prior to configuring the radios it is important to understand several key concepts:
Master Unit (MU) The MU is typically considered the primary radio within the link. For management purposes
it is recommended to install the MU closest to the head-end of the network.
Remote Unit (RU) The RU is typically installed at the remote end of the link. The primary distinction between
the MU and RU is that when the radios are not associated, the MU will transmit and the RU
will listen until the wireless link is established.
Peer ID Authentication is controlled by the MAC address of each radio. The Peer ID is defined as the
MAC address of the opposite radio. In other words, the Peer ID of the MU is the RU’s MAC
address and the Peer ID of the RU is the MU’s MAC address.
Opmode Operation mode (on or off). The radio will only transmit while set to Opmode ON.
Default Opmode Opmode (on or off) which the radio enters after reboot. Note: if you telnet into a radio
within 30 seconds after reboot, the radio will remain in opmode OFF even if the default
opmode is ON.
Essentials to Establish a Wireless Link
Configuration of the Atlas system is simple and at a minimum requires the following settings:
1. Designate one radio as the Master Unit (MU) and one unit as the Remote Unit (RU).
2. Program Peer ID in each radio.
3. Set MU and RU to same channel and antenna polarization
4. Set default Opmode to “ON” so that radio will automatically enter opmode after reboot.
5. Turn radios Opmode “ON”.
If all of these parameters are met, and if the MU and RU are within range and properly aligned, the wireless link will
automatically establish itself and Ethernet traffic will begin to pass between the radios.

Configuration
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 10
Master Unit Configuration
Start a telnet session with one of the radios. Follow these steps for configuration.
1. Set the Unit Type (utype) to MU in one radio. (default for all radios is RU)
#> utype mu
Success.
#>
2. Set the Peer ID with the MAC address of the RU. Only use the last 8 digits of the MAC address.
#> peerid de1B7850
Success.
#>
3. Set channel and polarization. (in this example set the channel to 1 and polarization to H).
#> freq 1 h
Ch# 1 h (4950 MHz)
Success.
4. Set default Opmode to ON.
#> defaultopmode on
Success.
5. Turn Opmode ON.
#> opmode on
Success.
.
Remote Unit Configuration
Configure the RU in the same manner as the MU. Since the default unit type (utype) is RU, you do not need to set this
parameter.
1. Set the Peer ID with the MAC address of the MU. Only use the last 8 digits of the MAC address.
#> peerid de1B7842
Success.
#>
2. Set channel and polarization. (in this example set the channel to 1 and polarization to H).
#> freq 1 h
Ch# 1 h (4950 MHz)
Success.
3. Set default Opmode to “ON.”
#> defaultopmode on
Success.
4. Turn Opmode “ON.”
#> opmode on
Success.

Configuration
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 11
Establishing a Wireless Link
If the MU and RU are properly configured and in opmode “ON”, the two radios will automatically begin the
authentication process and become connected. To determine if the two radios are connected, type the sysinfo 2
command.
Example:
#> sysinfo 2
********************************* 2 *********************************
[Opmode] on [Default Opmode] on
[Active Channel] 1 h [Freq] 4950 MHz
[Speed] 24 Mbps [Tx Power] 8 dBm [Power Range] 8..17 dBm
[Tx MIR] 50000 Kbps
[ARQ] on
[Encrypt] off [Key] 0011 2233 4455 6677 8899 AABB CCDD EEFF
[Peer ID] DE1B7850 [Status] connected [RSSI] -41 dBm
Success.
#>
The [status] field indicates whether the MU and RU are connected or disconnected. If connected, the MU and RU will
automatically start passing Ethernet traffic over the wireless link.
Changing IP Address
Use the ipconfig command to change the radio’s ip address, subnet mask and gateway.
Syntax: ipconfig [<ip> <subnet> <gateway>]
Example:
#> ipconfig 10.8.2.140 255.255.255.240 10.8.2.129
New configuration: [ip] 10.8.2.140 [subnet mask] 255.255.255.240 [gateway]
10.8.2.129
save and activate ? (y/n) [ATTN] Telnet session will be terminated in 30
seconds.
Success.
#>

Configuration
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 12
LEDs
LEDs are visible on the unit’s PCB between the reset button and the RJ-45 connector. The function of each
LED is described below:
LNK (green)
Green: On solid for an established 10BaseT or 100BaseT Ethernet Link.
SPEED
Green: Solid if 100BaseT, Blinks only if there is activity (TX or RX) on the network when a 100 MBit
connection is established. Off if a 10BaseT connection is established or if there is 10BaseT activity.
RSSI (4 LEDs)
Amber: Four LEDs
In all modes except “Survey”, the unit’s four yellow LEDs indicate the level of RF signal being
received from a VALID MU or RU as appropriate.
Yellow LED 1 : Begins blinking when RSSI is greater or equal to –90 dBm. On continuously at –85
dBm. This is the Leftmost LED
Yellow LED 2 : Begins blinking when RSSI is greater or equal to –80 dBm. On continuously at –75
dBm.
Yellow LED 3 : Begins blinking when RSSI is greater or equal to –70 dBm. On continuously at –65
dBm.
Yellow LED 4 : Begins blinking when RSSI is greater or equal to –60 dBm. On continuously at –55
dBm. This is the rightmost LED.
If no VALID MU or RU signal is detected the LEDs will not be on.
In addition, these 4 LEDs shall flash ON for 2 seconds, then OFF for 2 seconds to indicate the 'factory
reset' button has been activated and the reset successful.
ASSOCiation LED (green):
The ASSOC led blinks at the following rates:
- Once every second when unit is powered on but opmode is OFF.
- Twice per second while in opmode ON and scanning for an MU or RU.
- Solid after unit is associated with the RU or MU.

Configuration
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 13
RF Link Loopback Test (linktest command)
The linktest command tests the throughput and packet error rate (PER) on the current channel for each direction at all
speeds and reports results. This command also provides RSSI for both ends of the wireless link. The command can be
run from either the MU or the RU.
In running the linktest command the user must specify the modulation speed for each end of the link.
Command format: linktest <loc speed> <peer speed>
Valid modulation speeds are: 6,12,18,24,36,48, and 54 Mbps.
Example:
# linktest 24 24
local tx rate = 24 Mbps
peer tx rate = 24 Mbps
packet size = 1600 bytes
# of packets per period = 1000
# of Cycle = 10
0> [tx] 1000 [rx] 1000 [rssi] -37 peer: [tx] 1000 [rx] 1000 [rssi] -40 -> 22.01 Mbps
1> [tx] 1000 [rx] 1000 [rssi] -37 peer: [tx] 1000 [rx] 1000 [rssi] -40 -> 22.01 Mbps
2> [tx] 1000 [rx] 1000 [rssi] -37 peer: [tx] 1000 [rx] 1000 [rssi] -40 -> 22.01 Mbps
3> [tx] 1000 [rx] 1000 [rssi] -37 peer: [tx] 1000 [rx] 1000 [rssi] -40 -> 22.01 Mbps
4> [tx] 1000 [rx] 1000 [rssi] -37 peer: [tx] 1000 [rx] 1000 [rssi] -40 -> 22.01 Mbps
5> [tx] 1000 [rx] 1000 [rssi] -37 peer: [tx] 1000 [rx] 1000 [rssi] -40 -> 22.01 Mbps
6> [tx] 1000 [rx] 1000 [rssi] -37 peer: [tx] 1000 [rx] 1000 [rssi] -40 -> 22.01 Mbps
7> [tx] 1000 [rx] 1000 [rssi] -37 peer: [tx] 1000 [rx] 1000 [rssi] -40 -> 22.00 Mbps
8> [tx] 1000 [rx] 1000 [rssi] -36 peer: [tx] 1000 [rx] 1000 [rssi] -40 -> 22.01 Mbps
9> [tx] 1000 [rx] 1000 [rssi] -37 peer: [tx] 1000 [rx] 1000 [rssi] -40 -> 22.01 Mbps
--> [tx] 10000 [rx] 10000 [rssi] -36 peer: [tx] 10000 [rx] 10000 [rssi] -40
--> [Local PER] 0.00 % [Peer PER] 0.00 %
Success.
#>
In this example the linktest was run at 24 Mbps at each end of the link. The results indicated 10 cycles of 1000 packets
were transmitted and received from each end of the link without error. Actual achievable throughput is measured at 22
Mbps.

Configuration
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 14
Link Speed & Power Settings
Users may change the radio’s over-the-air data rate and conducted output power using the speed and power
commands. Keep in mind that the lower data rates offer higher receiver sensitivity and higher allowable
conducted RF power. The following table shows the relation between speed settings, receiver sensitivity, and
allowable maximum power settings. The lowest power setting is in –4 dBm.
Speed Setting
(over-the-air rate)
(Mbps)
Receiver
Sensitivity
(dB)
Max Power
(dBm)
6 -92 17
12 -87 17
18 -85 17
24 -84 17
36 -80 17
48 -75 17
54 -73 15
In this example the user sets the power to 18dBm and the speed to 24 Mbps:
#> power
Execution in progress....
17 dBm (8..17)
Success.
#> speed 24
24 Mbps
Success.
#>

Configuration
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 15
Command Reference Listing
The complete command set reference is provided below. You can also view a complete listing of all CLI commands by
typing help.
antenna [h|v] Set or display antenna setting. H=Horizontal
polarity, V=vertical polarity.
arq [on|off] Enable or disable Auto Retransmit Request
(ARQ). With ARQ enabled, the Atlas system
will retransmit packets which are detected as
missing or corrupted. Default setting=ON.
autorateshift [on|off] Enable or disable automatic rate shift feature.
With autorateshift enabled, the radios will
automatically renegotiate speed setting to
maximize wireless link integrity. Default
setting=OFF.
autoscanmu [on|off] Enable or disable auto scan MU (RU only).
Default setting=OFF . When autoscanmu is
turned on, the RU will automatically scan all
channels and polarizations searching for its peer
MU. Once the RU detects the MU it will stop
scanning and lock onto the channel of the MU.
The autoscan feature is useful in cases where
the user changes the channel at the MU because
the RU will automatically search for the new
channel of the MU. Note: auto-scanning may
take as long as 5 minutes.
defaultopmode [on|off] Set or display default opmode. Radio must be
set to opmode ON to establish wireless link.
Default setting=OFF
encrypt [on|off] Enable or disable proprietary 128 bit tx
encryption.
Default setting=OFF
encrypt key <key> Change encryption key (128 bits)
<key> = xxxx xxxx xxxx xxxx
xxxx xxxx xxxx xxxx
exit Exit telnet session
freq [<ch#> <antenna>] Set or display channel and antenna selection
freq writechannel <ch#> <freq>… Modify channel table, up to 6 channels at a time
freq writechannel default Restore factory default channel table
help [<command>] Display command usage and syntax
ipconfig [<ip> <subnet> <gateway>] Change ip configuration
<ip> = ip address
<subnet> = subnet mask
<gateway> = gateway ip address
linktest <local tx rate> <peer tx rate>
[<pkt size> [<# of pkt> [<# of
cycle>]]]
RF link loopback test
This is the primary loopback test utility for
evaluating over-the-air link quality. Provides
link reliability information and dropped packet
statistics. Standard linktest transmits 1600 byte
packets, 1000 packets per second for 10 cycles.

Configuration
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 16
User can specify packet size, quantity of
packets, number of cycles
<tx rate> = 6,12,18,24,36,48,54 Mbps
mir [<kbps>] Set or display tx maximum information rate
(MIR). MU and RU can be set with
different mir for asymmetric upload and
download.
<kbps> = 100..50000
opmode [on|off] Set or display operation mode (on or off)
password <ro|rw|upgrade> Change password
<ro> = for read-only
<rw> = for read-write
<upgrade> = for upgrading firmware
peerid [<peer device id>] Set or display peer device id
power [<dBm>] Set or display tx power
<dBm> is limited by area (ref: “sysinfo 4”)
reboot Reboot unit
remarks Enter user remarks up to 80 characters
reset Restore all factory defaults except ipconfig and
passwords.
rssi Display RF relative signal strength indication
(rssi) from peer radio
rssiled [on|off] Enable or disable rssi LED update
speed [<tx rate>] Set or display tx rate
<tx rate> = 6,12,18,24,36,48,54 Mbps
survey [<sec>] Display noise floor for current channel
<sec> = period 10..3600
default = 10
survey <sec> all Display noise floor for all available channels
survey <sec> [<ch#> [..]] Display noise floor for selected channels
sysinfo Display all system information
sysinfo [[<part #> [<part #> [..]]]] Display system information and status
<part #> = 0..6
part 0: up time and version information
part 1: MAC address and IP configuration
part 2: RF link status
part 3: channel table
part 4: region code and power limitations
part 5: switch settings and remarks
part 6: statistics
syslog Display system log
tftpd [on|off] Enable or disable tftpd (used for firmware
upgrades)
utype [mu|ru] Set or display unit type

Deployment & Installation
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3 page 17
Chapter 4 Deployment & Installation
Once you are familiar with the basic operation of the radios you are ready for deployment in the field. The deployment process
consists of the following steps:
•Site Selection
•Site survey at MU and RU sites
•MU installation
•RU installation and antenna alignment
•Link test
Site Selection
Proper site selection for your MU will help ensure a successful deployment. Site selection will depend on a wide variety of
factors, but from the radio’s performance standpoint, please consider the following:
•Path from MU to RU should provide unobstructed line-of-sight (LOS), thus it is advisable to place MU as high as
possible on a tall building or tower.
•Ethernet cable limit is 100 meters from Ethernet device (router, switch) to radio.
•Radios should never be deployed without proper grounding.
•Consider nearby sources of interference that could degrade the performance of the radio. Mount radios as far from
sources of interference as possible.
Site survey
The radios provide an on-board site survey tool which measures the average and peak noise levels on any given channel.
To use the survey tool, the radio must be in Opmode “OFF.” The survey can be performed for any specified amount of
time (in seconds), and for either the horizontal or vertical polarization.
Prior to performing the site survey, place the radio in the installation spot, and aim the radio in the desired direction.
After the specified period, the results of this command will provide you with a listing of each channel in the band, the
average signal received, and the maximum signal received during the survey period.
Example:
#> survey
Press any key to stop.
noise floor (peak/avg dBm) rssi by pkt (peak/avg dBm)
0> -97 / -98 n/a
1> -97 / -98 n/a
2> -97 / -98 n/a
3> -97 / -98 n/a
4> -97 / -98 n/a
5> -97 / -98 n/a
6> -97 / -98 n/a
7> -97 / -98 n/a
8> -97 / -98 n/a
Ch 1 h 4950 --> -97 / -98 n/a
Success.