RFM SNAP2411 User manual

SNAP2411 /X /D /DX
Spread Spectrum Network Access Point
Installation Guide

Important Regulatory Information
Cirronet Product FCC ID: HSW-2411
IC 4492A-2411
Note: This unit has been tested and found to comply with the limits for a Class A digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which case the user will be required to correct
the interference at their expense.
FCC s MPE Requirements
Information to user/installer regarding FCC s Maximum Permissible Exposure (MPE) limits.
Notice to users/installers using the 24 dBi parabolic dish antenna in conjunction with all Cirronet
RF products.
FCC rules limit the use of this antenna, when connected to Cirronet RF products for point-to-point
applications only. It is the responsibility of the installer to ensure that the system is prohibited from
being used in point-to-multipoint applications, omni-directional applications, and applications where there
are multiple co-located intentional radiators transmitting the same information. Any other mode of
operation using this antenna is forbidden.
Notice to users/installers using the following fixed antennas, with Cirronet RF products:
Cushcraft 15dBi Yagi,
Mobile Mark 14dBi Corner Reflector,
Mobile Mark 9dBi Corner Reflector
The field strength radiated by any one of these
antennas, when connected to Cirronet RF
products, may exceed FCC mandated RF
exposure limits. FCC rules require
professional installation of these antennas in
such a way that the general public will not be
closer than 2 m from the radiating aperture of
any of these antennas. End users of these
systems must also be informed that RF
exposure limits may be exceeded if personnel
come closer than 2 m to the apertures of any of
these antennas.
Notice to users/installers using the following mobile antennas, with Cirronet RF products:
Mobile Mark 12dBi omni-directional,
Mobile Mark 9dBi omni-directional,
MaxRad 5dBi whip,
Cirronet Patch antenna,
Ace 2dBi dipole,
Mobile Mark 2dBi Stub
The field strength radiated by any one of these
antennas, when connected to Cirronet RF
products, may exceed FCC mandated RF
exposure limits. FCC rules require professional
installation of these antennas in such a way
that the general public will not be closer than
20 cm from the radiating aperture of any of
these antennas. End users of these systems
must also be informed that RF exposure limits
may be exceeded if personnel come closer
than 20 cm to the apertures of any of these
antennas.

Declaration of Conformity
Warning! The RLAN transceiver within this device uses a band of frequencies that are not completely harmonized within the
European Community. Before using, please read the European Operation Section of the Products User’s Guide for limitations.
0889 is the identification number of RADIO FREQUENCY INVESTIGATION LTD - Ewhurst Park, Ramsdell RG26 5RQ
Basingstoke, United Kingdom – the Notified Body having performed part or all of
the conformity assessment on the product.
The WIT2411 to which this declaration relates is in conformity with the essential requirements
of the R&TTE directive 1999/5/EC and complies with the following standards and/or other
normative documents:
For Interfaces For RLAN Transceiver
EN 55022
EN 55024
EN 300 328
EN 301 489 -1, -17
EN 60950
Canadian Department of Communications Industry Canada (IC) Notice
Canadian Department of Communications Industry Canada (IC) Notice
This apparatus complies with Health Canada’s Safety Code 6 / IC RSS 102.
"To prevent radio interference to the licensed service, this device is intended to be operated indoors and away from
windows to provide maximum shielding. Equipment (or its transmit antenna) that is installed outdoors may be
subject to licensing."
ICES-003
This digital apparatus does not exceed the Class B limits for radio noise emissions from
digital apparatus as set out in the radio interference regulations of Industry Canada.
Le présent appareil numérique n'émet pas de bruits radioélectriques dépassant les limites applicables aux appareils
numériques de Classe B prescrites dans le règlement sur le brouillage radioélectrique édicté par Industrie Canada.

WARNING!!
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
For our Customers who wish to use this product in hazardous locations.
This SNAP2411 has been tested by Underwriters Laboratories Inc. for use in Class I, Division 2,
Groups A, B, C, and D Hazardous Locations as specified in UL1604 and UL/C-
UL/Zones(UL2279).
Such areas may have Explosive Gases.
To install this radio in this environment the following steps must be implemented.
1) The power supply used with the product must be a UL Class 2 rated device.
2) Contract a Qualified Licensed Electrician to install and run the power wiring from a
screw type, hard wired 12 VDC 1A Class 2 Output power supply in a UL Listed Box
and route a conduit to the radio which must be installed in a UL Listed Box suitable
for the environment. The conduit must be gas tight so no gases can flow through
conduit.
3) Any Cirronet products with outdoor radio transceivers (tower mounted) marked for
Hazardous Locations must have the interconnecting multi-conductor cable run in
approved conduit for the location. The cable must be in the conduit until out of the
Hazardous Location and the conduit must be gas tight so no gases can flow through
conduit.
4) Do NOT remove the power connector to the device while circuit is live. Disconnect
power only while circuit is dead, or the location is known to be non-hazardous.
Failure to do so, may result in a “Risk of Fire or Explosion”
Only then is the unit suitable for a hazardous location.
For more information on Hazardous Locations contact UL and ask for UL1604
requirements.
www.ul.com
RF Exposure
WARNING: End Users of these systems must be informed that RF exposure limits
may be exceeded if personnel come closer than 45 cm to the antenna aperture when
exceeding 9 dBi of gain in conjunction with the transceiver.
Repairs
Cirronet does not recommend field repairs of the radio equipment. Surface Mount
Technology (SMT) has been used in the production of the transceiver module, which
requires specialized training and equipment for proper servicing. The equipment
should be returned to the factory for any repair.

Table of Contents
Introduction ..................................................................................................................... 1
Getting Started................................................................................................................ 2
SNAP2411 ...................................................................................................................... 3
SNAP Status Indicators................................................................................................4
SNAP2411X.................................................................................................................... 5
Attaching the Data/Power Cable Connector................................................................. 7
SNAP2411D.................................................................................................................... 8
SNAP Status Indicators................................................................................................9
SNAP2411DX ............................................................................................................... 10
Attaching the Data/Power Cable Connector............................................................... 11
Configuring the SNAP...................................................................................................13
European Union Settings ........................................................................................... 14
European Union Use with Gain Antennas.................................................................. 14
SNAPCom Utility...........................................................................................................16
TCP Client Operation.................................................................................................16
TCP Server Operation................................................................................................17
UDP Operation...........................................................................................................18
SNAP Operation............................................................................................................20
Overview.................................................................................................................... 20
DHCP......................................................................................................................... 20
BOOTP....................................................................................................................... 20
Synchronization..........................................................................................................21
SNAP System Commands......................................................................................... 22
Ethernet Commands .................................................................................................. 23
SNAP Radio Commands............................................................................................ 24
Radio Commands....................................................................................................... 25
TCP/IP Mode Operation................................................................................................26
Client Mode................................................................................................................ 26
Server Mode............................................................................................................... 27
Assigning Remotes IP Addresses.............................................................................. 28
Assigning Remotes Port Numbers ............................................................................. 29
TCP/IP Commands .................................................................................................... 30
UDP Mode Operation.................................................................................................... 32
UDP Commands ........................................................................................................ 32
PPP Mode Operation ....................................................................................................34
PPP Commands.........................................................................................................35
Troubleshooting ............................................................................................................38
Technical Support ...................................................................................................... 38
Quick Reference ........................................................................................................... 39

SNAP System Commands......................................................................................... 39
Ethernet Commands .................................................................................................. 39
SNAP Radio Commands............................................................................................ 39
Radio Commands....................................................................................................... 40
TCP Commands.........................................................................................................40
Appendix a.................................................................................................................... 43
Specifications................................................................................................................ 45
Warranty........................................................................................................................ 46

SNAP2411
INTRODUCTION
The SNAP2411 from Cirronet Incorporated provides Ethernet connectivity to networks of
WIT2411 serial radios. Built around the WIT2411, the SNAP2411 provides a 10/100BaseT
connection to Ethernet networks and functions as base stations for remote devices containing
WIT2411 transceivers. The SNAP2411 allows non-Ethernet serial devices to appear as Ethernet
devices to network-based applications.
Each SNAP2411 can support 60 simultaneous remotes. Each remote radio has a unique ID
number, so the number of remotes that can communicate with a SNAP is unlimited, subject to a
limit of 60 remotes at any one time.
The communication between the SNAP and the WIT2411 remotes is performed using the
WIT2411 over-the-air protocol. Thus the SNAP products are 802.3 compatible but not 802.11b
compatible. By using the 1.23Mbps over-the-air data rate and the WIT2411 protocol, the full
range of WIT2411 radios is realized, three times the range of most 802.11b products.
The SNAPs enjoy the same benefits of frequency-hopping spread spectrum technology that the
WIT2411s do. Namely, the immunity to multipath fading and resistance to jamming that is
provided by changing frequency every few milliseconds. Operating in the 2.4GHz ISM band,
SNAPs can be used license-free.
The SNAP has three modes of operation, TCP/IP, UDP and PPP. The default mode is the TCP/IP
mode. In TCP/IP mode, the SNAP acts like any other network access point as either a client or
server device. This allows standard WinSocket®routines to be utilized. Remote devices are
setup to be identified by either an IP address or by a port number under the IP address of the
SNAP. The remote devices send and receive unformatted data to and from the SNAP which
performs the encapsulation and de-encapsulation of the unformatted data into and out of Ethernet
datagrams.
The UDP mode is similar to the TCP/IP mode with remotes operating as clients. This mode
supports the connection-less UDP protocol.
The PPP mode is intended for applications where the remote device is equipped with a PPP
client. In these applications, the SNAP functions as a PPP host providing Internet Access to the
remote devices.
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SNAP2411
GETTING STARTED
The SNAP2411 is easy to install and operate. In most instances, the only installation steps will
be setting IP addresses and connecting the antenna, power and Ethernet cable.
Setting up a SNAP2411 requires the following steps:
•Enter an IP address into the SNAP
•Configure the SNAP to act as a client to a server-based application or to act as a server to
a client workstation.
•Set remote WIT2411 devices to be identified to the application as individual IP addresses
or port numbers.
The default settings in the SNAP are sufficient to allow connection to Ethernet networks and to
have remote WIT2411 devices connect with the SNAP. Other steps you may want to take
include:
•Enter a default route IP address if data is to be sent off the SNAP’s subnetwork (See
Ethernet Commands)
•Change the network number (See Radio Commands)
Instructions on setting up the SNAP are detailed in the Configuring the SNAP section of this
manual. Details on the various operating modes and configurations can be found the SNAP
Operation section.
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SNAP2411
SNAP2411
Figures 1 and 2 identify the various connectors and indicators of the SNAP2411.
Figure 1. SNAP2411 Front Panel Diagram
LINKTXD RXDLINK
RF
ETHERNET
PWR
SNAP241
1
Figure 2. SNAP2411 Rear Panel Diagram
DC IN
ETHERNETSYNC OUTSYNC INCONSOLE
RF OUT
The antenna connector is a reverse polarity TNC type connector. An antenna may be connected
directly to this connector. Alternatively, an antenna may be located away from the SNAP using
RF cable to connect the SNAP to the antenna. Cirronet does not recommend using RF cables
longer than 5 feet. If more distance is required between the SNAP and the antenna Cirronet
recommends using the SNAP2411X. If the SNAP2411X is not used, high-quality, low-loss RF
feed line must be used.
The 10/100BaseT Ethernet connector is the standard RJ-45 connector. The connector is wired to
be able to connect directly to an Ethernet hub using a cross-over cable. If it is desired to connect
the SNAP directly to a PC without a hub, the SNAP must be connected with a straight through
cable. (Both cables are provided.)
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SNAP2411
The synchronizing signals are provided for special applications where multiple master SNAPs
are employed. The synchronizing signals are RS-485 levels and may be connected using an RJ-
11 connector. SNAPs will automatically determine which SNAP will generate the sync signal.
See the section Synchronization for details. In most instances the synchronizing signals are not
required and may be left unconnected.
The power connector is a 2-pin DIN type connector. The provided AC adapter provides a 12 volt
power level to the SNAP. The SNAP can accept DC voltages ranging between 9VDC and
26VDC if alternative power supplies are to be used.
The Configuration Port is an RS-232 serial port that may be used to configure the SNAP. This is
useful when the default IP address of the SNAP cannot be used with the existing network
preventing configuration through a telnet session. See the section Configuring the SNAP for
details of using this port.
SNAP Status Indicators
The PWR indicator on the front panel indicates that power is applied to the SNAP. A flashing
LED indicates the SNAP is executing the built-in memory test.
TXD and RXD are indicators of data activity. They indicate the transmission and reception of
data over the Ethernet connection. Note that these LEDs can be active even when the SNAP has
no remote radios registered.
The LINK indicator when illuminated indicates a good connection to the Ethernet network. If
this LED is not on, it can indicate a cross-wired connection between the SNAP and the network.
It may also indicate a faulty cable connection.
The RF LINK LED indicates a socket connection has been established.
The RF XCVR indicator (X version only) when illuminated, means the SNAP is communicating
properly with the external radio.
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SNAP2411
SNAP2411X
Figures 3 and 4 show the various connectors and LEDs of the SNAP2411X. Figure 5 illustrates
the remote radio assembly. Connection between the SNAP2411X enclosure and the remote radio
assembly is made through the 15-pin remote radio connector on the front of the SNAP2411X.
Digital signals, rather than RF signals are sent over the connecting cable which may be up to 300
feet in length. These cables may be ordered from Cirronet in lengths of 100 feet to 300 feet in
100-foot increments.
The remote radio assembly has mounting holes to secure the antenna. The antenna is attached to
the remote radio through the included 24-inch RF cable. If the antenna is not to be mounted on
the remote radio assembly, connection between the remote radio and the antenna must be made
with high-quality , low-loss RF cable. Cirronet recommends limiting the length of the RF cable
to 5 feet to minimize RF signal loss.
Figure 3. SNAP2411X Front Panel
LINK XCVRTXD RXDLINK
RF
ETHERNET
PWR
REMOTE RADIO
SNAP2411X
Figure 4. SNAP2411X Rear Panel
DC IN
ETHERNETSYNC OUTSYNC INCONSOLE
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SNAP2411
Figure 5. Remote Radio Assembly
Mounting Strap Holes (8)
Antenna Mounting
Holes
(
6
)
Data/Power
Connector RF Connector
Note that the remote radio assembly should be mounted on a tower or building top oriented as in
Figure 5. It is important that the RF connector on the remote radio assembly point to the ground
to avoid any issues with rain water.
Note: The SNAP2411X, it must be limited to +12-+26VDC +/-10%. Failure to meet this
specification can result in damage to the remote radio assembly.
The 10/100BaseT Ethernet connector is the standard RJ-45 connector and is located on the rear
of the SNAP. The SNAP is set up to use a straight through cable to connect to a PC. If a straight
through cable is used to connect the SNAP to other devices through a hub, the SNAP must be
connected to the uplink port on the hub.
The SYNC IN and SYNC OUT signals are provided for special applications where multiple
master SNAP s are co-located. The synchronizing signals are RS-485 levels and may be
connected using an RJ-11 connector. SNAPs will automatically determine which SNAP will
generate the sync signal. See the section Synchronization for details.
The Console port is an RS-232 serial port that may be used to configure the SNAP. Connection
to this port is made with the 9-pin to RJ-11 serial cable included with the SNAP. This is useful
when the default IP address of the SNAP cannot be used with the existing network preventing
configuration through a telnet session. See the section Configuring the SNAP for details of using
this port.
The power connector is a 2-pin DIN type connector. The provided AC adapter provides a 12 volt
power level to the SNAP . The SNAP can accept DC voltages ranging between 12VDC and
26VDC if alternative power supplies are to be used.
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SNAP2411
Attaching the Data/Power Cable Connector
The figure below shows the pin numbering of the Data/Power connector. The view provided is looking into the side
of the connector into which the pins will be inserted.
The cable pins are installed by choosing the appropriate conductor color and connector hole location and inserting
the pin into the hole until it “clicks” into place. Verify the pin is locked into place by gently pulling on the
conductor.
If a pin is installed in the wrong connector location, use the extractor tool to remove the pin. Insert the extractor tool
into the connector hole such that the tool surrounds the pin. Gently push the extractor tool completely into the hole.
Remove the pin by gently pulling on the conductor. If the pin does not come out easily, it is an indication the tool is
not fully inserted. Do not pull on the conductor forcefully as that can pull the conductor out of the pin.
Use the following color code to insert the pins into the connector:
CONNECTOR PIN CONDUCTOR COLOR CONNECTOR PIN CONDUCTOR COLOR
1 Brown 9 Green
2 Orange/Black 10 Orange
3 Black 11 Violet
4 Blue 12 Yellow
5 Tan 13 White/Black
6 Pink 14 Grey
7 White 15 White/Red
8 Red
Care must be taken to follow the color code correctly. An incorrectly assembled connector can damage the radio or
the card or both.
Complete the assembly by placing the connector in the slot in one of the shell halves. Install the two retaining
screws on both sides of the shell and through the holes on both sides of the connector; place the other shell half over
the connector so the connector lies in the shell slot. Secure the connector shell halves with the nuts and bolts
provided.
Refer to the figures below.
Pinned connector in bottom connector shell Completed connector with top connector shell attached.
©2000- 2004 Cirronet™Inc 7 M-2411-0012 Rev -

SNAP2411
SNAP2411D
Figure 6 shows the SNAP2411D with a closeup of the Status Indicators.
Figure 6. SNAP2411D
The antenna connector is a reverse polarity TNC type connector. An antenna may be connected
directly to this connector. Alternatively, an antenna may be located away from the SNAP using
RF cable to connect the SNAP to the antenna. Cirronet does not recommend using RF cables
longer than 5 feet. If more distance is required between the SNAP and the antenna Cirronet
recommends using the SNAP2411DX. If the SNAP2411DX is not used, high-quality, low-loss
RF feed line must be used.
The 10/100BaseT Ethernet connector is the standard RJ-45 connector. The connector is wired to
be able to connect directly to an Ethernet hub using a cross-over cable. If it is desired to connect
the SNAP directly to a PC without a hub, the SNAP must be connected with a straight through
cable. (Both cables are provided.)
The synchronizing signals are provided for special applications where multiple master SNAPs
are employed. The synchronizing signals are RS-485 levels and may be connected using an RJ-
11 connector. SNAPs will automatically determine which SNAP will generate the sync signal.
See the section Synchronization for details. In most instances the synchronizing signals are not
required and may be left unconnected.
The power connector is a 2-pin DIN type connector. The provided AC adapter provides a 12 volt
power level to the SNAP. The SNAP can accept DC voltages ranging between 9VDC and
26VDC if alternative power supplies are to be used.
The Configuration Port is an RS-232 serial port that may be used to configure the SNAP. This is
useful when the default IP address of the SNAP cannot be used with the existing network
©2000- 2004 Cirronet™Inc 8 M-2411-0012 Rev -

SNAP2411
preventing configuration through a telnet session. See the section Configuring the SNAP for
details of using this port.
SNAP Status Indicators
The PWR indicator on the front panel indicates that power is applied to the SNAP. A flashing
LED indicates the SNAP is executing the built-in memory test.
TXD and RXD are indicators of data activity. They indicate the transmission and reception of
data over the Ethernet connection. Note that these LEDs can be active even when the SNAP has
no remote radios registered.
The LINK indicator when illuminated indicates a good connection to the Ethernet network. If
this LED is not on, it can indicate a cross-wired connection between the SNAP and the network.
It may also indicate a faulty cable connection.
The RF LINK LED indicates a socket connection has been established.
The RF XCVR indicator (X version only) when illuminated, means the SNAP is communicating
properly with the external radio.
©2000- 2004 Cirronet™Inc 9 M-2411-0012 Rev -

SNAP2411
SNAP2411DX
Figure 7 shows the SNAP2411DX and the remote radio assembly. Connection between the
SNAP2411X enclosure and the remote radio assembly is made through the 15-pin remote radio
connector on the front of the SNAP2411X. Digital signals, rather than RF signals are sent over
the connecting cable which may be up to 300 feet in length. These cables may be ordered from
Cirronet in lengths of 100 feet to 300 feet in 100-foot increments.
The remote radio assembly has mounting holes to secure the antenna. The antenna is attached to
the remote radio through the included 24-inch RF cable. If the antenna is not to be mounted on
the remote radio assembly, connection between the remote radio and the antenna must be made
with high-quality , low-loss RF cable. Cirronet recommends limiting the length of the RF cable
to 5 feet to minimize RF signal loss.
Figure 7. SNAP2411DX w/Remote Radio Assembly
Note that the remote radio assembly should be mounted on a tower or building top oriented as in
Figure 5. It is important that the RF connector on the remote radio assembly point to the ground
to avoid any issues with rain water.
Note: The SNAP2411X, it must be limited to +12-+26VDC +/-10%. Failure to meet this
specification can result in damage to the remote radio assembly.
The 10/100BaseT Ethernet connector is the standard RJ-45 connector and is located on the rear
of the SNAP. The SNAP is set up to use a straight through cable to connect to a PC. If a straight
through cable is used to connect the SNAP to other devices through a hub, the SNAP must be
connected to the uplink port on the hub.
The SYNC IN and SYNC OUT signals are provided for special applications where multiple
master SNAP s are co-located. The synchronizing signals are RS-485 levels and may be
connected using an RJ-11 connector. SNAPs will automatically determine which SNAP will
generate the sync signal. See the section Synchronization for details.
©2000- 2004 Cirronet™Inc 10 M-2411-0012 Rev -

SNAP2411
The Console port is an RS-232 serial port that may be used to configure the SNAP. Connection
to this port is made with the 9-pin to RJ-11 serial cable included with the SNAP. This is useful
when the default IP address of the SNAP cannot be used with the existing network preventing
configuration through a telnet session. See the section Configuring the SNAP for details of using
this port.
The power connector is a 2-pin DIN type connector. The provided AC adapter provides a 12 volt
power level to the SNAP . The SNAP can accept DC voltages ranging between 12VDC and
26VDC if alternative power supplies are to be used.
Attaching the Data/Power Cable Connector
The figure below shows the pin numbering of the Phoenix Contact, 16 pin, 3.81mm Data/Power
connector (P/N1803714). The view provided is facing the side of the connector with the screw
heads showing.
The cable comes with pins pre-crimped onto the conductors and is assembled by inserting a
crimped pin into a hole location, then tightening the screw to hold the pin securely. To verify the
pin is held firmly in place, gently pull on the conductor wire.
©2000- 2004 Cirronet™Inc 11 M-2411-0012 Rev -

SNAP2411
If a pin is accidentally installed in the wrong connector location, simply loosen the screw,
remove the pin, re-insert it into the proper location hole and tighten the screw. Use the following
color code to insert the pins into the connector:
CONNECTOR PIN CONDUCTOR COLOR CONNECTOR PIN CONDUCTOR COLOR
1 Brown 9 Green
2 Orange/Black 10 Orange
3 Black 11 Violet
4 Blue 12 Yellow
5 Tan 13 White/Black
6 Pink 14 Grey
7 White 15 White/Red
8 Red
Care must be taken to follow the color code correctly. An incorrectly assembled connector can
damage the radio or the card or both. The picture below shows the completed cable assembly.
©2000- 2004 Cirronet™Inc 12 M-2411-0012 Rev -

SNAP2411
CONFIGURING THE SNAP
SNAPs are shipped from the factory with no IP address, no DNS address and no route or
gateway address specified. If a BOOTP or DHCP server is not present an IP address must be
assigned to the access point before connecting it to a network. To allow IP traffic to leave the
particular subnet to which the access point is connected, the IP address of the gateway, bridge,
router or other device that allows access outside the subnet must be entered as the routing
address. If a DHCP server is present on the network, the IP, default route address and DNS
server address can be set up through it. Note that while a BOOTP server can set the IP address in
the SNAP, it cannot set the default router or DNS server IP addresses. See the section BOOTP
and DHCP for details.
The network that the SNAP is connecting to must be compatible with 10/100BaseT products.
Before connecting a default configured SNAP to an active network that does not have a BOOTP
or DHCP server, ask the network system administrator for an IP address for the SNAP that will
not cause any problems on the network.
The SNAP is shipped from the factory to try to get an IP address from a DHCP server. If a
DHCP server is present, the SNAP will accept its IP address from the server and can be located
on the server under the host name “Cirronet_AP.” If a DHCP server is not to be used, the IP
address must be set using the Console port.
The WinSNAP utility program is included on the CD. Alternatively, terminal programs such as
HyperTerminal can be used. The settings for the serial port are 38400 baud, 8 data bits, 1 stop
bit, no parity and none for handshaking. Once connection is made to the SNAP through the
Console port and power is applied to the SNAP, the SNAP firmware version is displayed
followed by the TCP> prompt.
To enter an IP address in the SNAP, use the ip command.
ip <xxx.xxx.xxx.xxx> {yyy.yyy.yyy.yyy}
Where x is the IP address, and y is the optional netmask number.
Once a valid IP address has been entered in the SNAP, a second method to complete the
configuration of the SNAP is through a telnet session. Most telnet programs work with the
SNAP. Windows has a telnet program that works with the SNAP. A telnet session can be
started by clicking on Start->Run if the TCP/IP client has been installed. For a SNAP with an IP
address of 192.168.0.254, enter the following information in the dialog box:
telnet 192.168.0.254
A telnet window will open up. The first line is the version of the SNAP firmware followed by the
prompt:
TCP>
The SNAP commands are the same whether they are entered through the Console port or through
a telnet session.
To enter the default routing address use the route command.
route add default <xxx.xxx.xxx.xxx> {yyy.yyy.yyy.yyy}
Where xis the IP address of the gateway device and yis the optional netmask number.
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SNAP2411
To configure the SNAP to operate in client mode, use the tcp server add command to enter
the IP address and port number of the server to be used.
tcp server add <xxx.xxx.xxx.xxx> <ppppp>
Where xxx.xxx.xxx.xxx is the IP address of the server and ppppp is the server port number to be
used.
In server mode, the SNAP uses a control port to inform the client application of remote devices
as they register with and disconnect from the SNAP. The default port number for the control port
is 2430. This port number can be changed using the tcp control command.
tcp control <1..65,536><CR>
Refer to the section Server Mode for additional details of this mode of operation.
Store the configuration parameters in non-volatile memory with the save command:
save<CR>
The SNAP will report back the time it took for the save. Reset the SNAP by typing:
reset<CR>
The SNAP can also be reset by cycling power. Whenever a reset is executed on the SNAP, the
telnet session will be lost. It will take the SNAP about 30 seconds to reinitialize after a reset or
after cycling power.
Note: The save and reset commands must be entered after modifying the default
configuration. Failure to do so will result in the factory defaults to be used.
European Union Settings
When operating the SNAP2411 in France, a limited frequency mode must be selected. To select
the limited frequency band at the SNAP > prompt enter:
hop set 1 <CR>
Save this setting by typing:
save<CR>
The limited frequency operation will take effect immediately and will be saved into memory for
use when power is cycled.
European Union Use with Gain Antennas
Use of the SNAP2411 within the European Union is limited to a maximum transmit power
including antenna gain of 20dBm. The antenna supplied with the SNAP2411 is a 2dBi antenna.
The transmit power of the SNAP2411 in the default mode is 18dBm. Thus the supplied antenna
meets the EU limit. If gain antennas are to be used, the low power setting of the SNAP2411 must
be selected. This setting sets the transmit power at the antenna connector to 10dBm. In this
setting a maximum of 10dB of antenna gain may be used. To select low power mode, at the
command line prompt enter:
radio power 10<CR>
To save this parameter in non-volatile memory type:
save<CR>
©2000- 2004 Cirronet™Inc 14 M-2411-0012 Rev -