Sierra Wireless R1902G GSM 850/1900 Data Modems User Manual Redwing GPRS User Guide

Sierra Wireless, Inc. GSM 850/1900 Data Modems Redwing GPRS User Guide

Contents

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User Guide
Version 1.08
AirLink Communications, Inc.
September 29, 2003
AirLink
Communications
Information in this document is subject to change without notic
© Copyright AirLink Communications, Inc, 1993-2003. All rights reserved.
Please send comments to:
email: pubs@AirLink.com
Fax: 510-226-4299
Phone: 510-226-4200
Post: AirLink Communications, Inc.
Attention: Technical Publications Dept.
472 Kato Terrace
Fremont, CA 94539
Important Notice
Because of the nature of wireless communications, transmission and reception of
data can never be guaranteed. Data may be delayed, corrupted (i.e., have errors) or
be totally lost. Although significant delays or losses of data are rare when wireless
devices such as the AirLink Communications modem are used in a normal manner
with a well-constructed network, the AirLink modem should not be used in situations
where failure to transmit or receive data could result in damage of any kind to the
user or any other party, including but not limited to personal injury, death, or loss of
property. AirLink Communications, Inc., accepts no responsibility for damages of any
kind resulting from delays or errors in data transmitted or received using the
AirLink Communications modem, or for failure of the AirLink Communications
modem to transmit or receive such data.
Safety and Hazards
Do not operate the AirLink Communications modem in areas where blasting is in
progress, where explosive atmospheres may be present, near medical equipment,
near life support equipment, or any equipment which may be susceptible to any form
of radio interference. In such areas, the AirLink Communications modem MUST BE
POWERED OFF. The AirLink Communications modem can transmit signals that
could interfere with this equipment. Do not operate the AirLink Communications
modem in any aircraft, whether the aircraft is on the ground or in flight. In aircraft,
the AirLink Communications modem MUST BE POWERED OFF. When operating,
the AirLink Communications modem can transmit signals that could interfere with
various onboard systems. The driver or operator of any vehicle should not operate the
AirLink Communications modem while in control of a vehicle. Doing so will detract
from the driver or operator's control and operation of that vehicle. In some states and
provinces, operating such communications devices while in control of a vehicle is an
offence.
Limitation of Liability
The information in this manual is subject to change without notice and does not
represent a commitment on the part of AirLink Communications, Inc. AIRLINK
COMMUNICATIONS, INC. SPECIFICALLY DISCLAIMS LIABILITY FOR ANY
AND ALL DIRECT, INDIRECT, SPECIAL, GENERAL, INCIDENTAL,
CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES INCLUDING, BUT
NOT LIMITED TO, LOSS OF PROFITS OR REVENUE OR ANTICIPATED
PROFITS OR REVENUE ARISING OUT OF THE USE OR INABILITY TO USE
ANY AIRLINK COMMUNICATIONS, INC. PRODUCT, EVEN IF AIRLINK
COMMUNICATIONS, INC. HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES OR THEY ARE FORESEEABLE OR FOR CLAIMS BY ANY
THIRD PARTY.
Redwing GPRS User Guide
Table of Contents
1. Introduction ..................................................................................... 1
1.1 Redwing Product Overview ........................................................................... 2
2. Redwing Network Connection ..................................................... 3
2.1 Internet (TCP/IP) Connections via GPRS .................................................... 3
3. Redwing GPRS Configuration ..................................................... 4
3.1 Configuration Procedure ............................................................................... 4
3.2 Modem Activation.......................................................................................... 6
3.2.1 SIM Check 7
3.2.2 PDP Context 7
4. Using AT Commands ...................................................................... 9
4.1 Redwing GPRS Specific AT Commands ..................................................... 10
4.2 Redwing AT Command Summary .............................................................. 13
4.3 Redwing SMS Command Summary ........................................................... 15
4.4 Redwing GPRS Commands ......................................................................... 16
4.5 RIM Specific AT Commands ....................................................................... 16
5. Redwing GPRS Technical Specifications ................................ 17
5.1 Physical Characteristics .............................................................................. 17
5.2 Power Specifications .................................................................................... 17
5.3 Environmental ............................................................................................. 17
5.4 RF Features ................................................................................................. 17
5.5 Status LED Display..................................................................................... 18
5.6 Application Interface Features ................................................................... 18
Redwing GPRS
User Guide
1. Introduction
The GSM/GPRS wireless network combines the world’s leading wireless standard—
the Global System for Mobile Communications (GSM)—with fast, packet-switched
access to data networks such as the Internet. Providing this fast access is the
General Packet Radio Service (GPRS).
The AirLink GPRS modems are designed to operate in GSM/GPRS networks. Two
data services are available in the GSM/GPRS networks: GPRS, a packet switched
connection, and SMS, a short message service..
GPRS
GPRS is an IP-based service that offers fast, packet-switched access to data networks
such as the Internet. It is a mobile service that improves the peak-time capacity of a
GSM network. GPRS gives packet-switched access over GSM to external data
networks with high peak transfer capacity. The main objective of GPRS is to offer
access to standard data networks such as TCP/IP. GPRS is a non-voice service
designed specifically for transmitting data. It breaks data messages into separate
packets for transmission from the mobile device and sends them to destinations in an
external network.
Most any Internet-based application or service will run on GPRS. GPRS offers peak
throughputs of 40 Kbps (53.6 Kbps raw) Because GPRS capacity is shared among
active users in the same coverage area, actual throughputs may vary.
GPRS
Network
Internet
Redwing Product Overview Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 2 September 29, 2003
1.1 Redwing Product Overview
The AirLink Redwing GPRS is a rugged, full duplex GPRS modem that provides
wireless transport capabilities for fixed and mobile applications. GPRS is an efficient
and secure wireless technology that works well for fixed or mobile applications.
The Redwing's rugged form factor is ideal for industrial and commercial applications
that require real-time communications. The Redwing provides wireless data
communications for a variety of applications, such as telemetry, public safety,
SCADA, traffic control, traffic metering, transit arrival systems and more.
Front of Redwing
Back of Redwing
Redwing Network Connection Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 3 September 29, 2003
2. Redwing Network Connection
The AirLink Redwing GPRS modems are capable of providing network connections
for GPRS and SMS data.
2.1 Internet (TCP/IP) Connections via GPRS
When using the Redwing GPRS, remote access to is done via a PPP (TCP/IP)
connection to the GPRS network. The GPRS carrier actually provides Internet
connectivity, and, therefore, it becomes the ISP for that session. Applications such as
web browsing, email, FTP, etc should work as they would normally.
GPRS
Network
Internet
Corporate
LAN
Data
Acquisition
App
GPRS
Network
Corporate
LAN
Internet
Redwing GPRS Configuration Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 4 September 29, 2003
3. Redwing GPRS Configuration
Configuration of the Redwing GPRS modem is done using a terminal emulation
program like HyperTerminal in Windows.
3.1 Configuration Procedure
1. Attach the antennas, DB-9 cable and power to the back of the modem.
2. Power on the modem, and ensure the Pwr light is lit.
3. Attach the modem to the back of the PC with the provided DB-9 cable.
(Note, if you did not order a cable with your modem, you need a straight-thru
RS-232 cable to attach to the modem.)
4. Select Start→ Programs→ Accessories→ Communications→
HyperTerminal.
5. Enter the name of the connection and select OK.
Redwing GPRS Configuration Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 5 September 29, 2003
6. For "Connect using" select the COM port that the modem is on (do not select
a modem driver), then select OK.
7. Select 115200 for the "Bits per second." Ensure Data Bits: 8, Parity: None,
Stop bits: 1 and Flow control: Hardware. Then select OK.
(These are the factory default settings for a GPRS modem. If you get garbled
characters when typing AT commands, change these settings and reconnect
to the modem. For example, change the baud rate to 57,600 bits per second
and connect again, etc.)
Redwing GPRS Configuration Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 6 September 29, 2003
8. Type AT followed by [Enter]. You should receive an "OK" in response.
Other AT commands may now be issued to the modem. See Section Using AT
Commands for a list of AT commands
3.2 Modem Activation
The Redwing GPRS modem requires a SIM [Subscriber Identity Module] for the
modem’s account activation. Units will usually be shipped with a SIM installed and
be ready to operate. If a SIM is installed, and the modem is in GSM/GPRS coverage,
the status indicators will look like the following:
where the status indicators have the following meanings:
GSM indicates GSM coverage if +RSCI=0
indicates GPRS coverage if +RSCI=1
Tx indicates the radio is transmitting
Radio The OEM module radio is on and ready to transmit and receive
Pwr The power is on.
Redwing GPRS Configuration Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 7 September 29, 2003
If there is no SIM installed or there is no GSM/GPRS coverage, the GSM indicator
will be off.
Indicating no GSM/GPRS coverage or no SIM installed
Connect up to configure the modem as in the Local Configuration Section .
If you are unfamiliar with using AT commands, please review the Using AT
Commands Section first.
3.2.1 SIM Check
You can check if a SIM [Subscriber Identity Module] is in the Redwing with the
AT+CIMI command. If a SIM is in the modem, you will see a response like the
following:
at+cimi
310380006255650
OK
The number is the IMSI [International Mobile Subscriber Identity] which is unique
to each SIM.
If there is no SIM, there will be a blank response like the following:
at+cimi
OK
3.2.2 PDP Context
Check if the PDP context is correct with the command:
AT+CGDCONT?
You should get a response like:
at+cgdcont?
+CGDCONT:1,"IP","proxy","",0,0
OK
If you get a blank response, you need to set the PDP context. You need the APN
[Access Point Name] which you can obtain from the carrier rep or from whomever
you received the account. Most companies will be using a custom APN that allows
them to communicate with all
Redwing GPRS Configuration Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 8 September 29, 2003
To set the PDP context:
at+cgdcont=1,”IP”,”apn_obtained_from_carrier”
at&w
You only need to do this once after powering up. Henceforth, the modem will use this
setting to attach to the GPRS network.
Using AT Commands Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 9 September 29, 2003
4. Using AT Commands
Use a terminal emulation program to connect up to the modem either locally (via the
serial port of a computer) or remotely (over an existing internet connection on a PC to
the modem at a remote location). Set up to connect to the modem by either method
described in Section Error! Reference source not found..
Sample AT Commands
Here is an example of entering AT commands, changing some settings, saving and
resetting the modem. (Note that any command you are unsure of is explained in The
AT Commands section.)
Type AT and press the Enter key. AT<enter>
You should get a response of "0" or "OK".
To turn on echo and verbose modes, type the following:
ATE1V1<enter>
You should see an "OK" response if Verbose Mode was properly activated (V1)
If you should see a “0” response, your modem is in Terse Mode and the V1 command
did not adhere.
Try ATV1 again by itself if that happens. You should see an “OK” response now.
To set the baud rate, (like 115200), type the following:
ATS23=115200,8N1<enter>
You should get an "OK" (if in Verbose Mode)
Note: Command settings take effect immediately unless otherwise noted in the
description.
Note: HyperTerm needs to be disconnected and reconnected after each baud rate
change to have it take effect.
Redwing AT Command Summary Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 10 September 29, 2003
4.1 Redwing GPRS Specific AT Commands
These AT commands are specific to the Redwing GPRS devices and GPRS networks.
Command Description
A/ Reissue the last command
A Answer a call
Dn Mobile-initiated call to dialable number n
DL redial last telephone number used
E set command echo mode
H disconnect existing connection
I display product identification information
O switch from command mode to data mode
S0 set number of rings before automatically answering the call
S1 count the number of incoming rings
S2 set the character used to escape from data mode
S3 set termination character for a command prompt
S4 set response formatting character
S5 set editing character for a command prompt
S6 set pause before blind dialing
S7 set number of seconds to wait for connection to complete
S8 set number of seconds to wait when there is a comma dial modifier
S10 set disconnection delay after indicating the absence of data carrier
S12 set the escape code guard time
S13 set the disconnection delay after a call has been terminated
V set result code format mode
X set CONNECT result code format and call monitoring
Z set all current parameters to a user-defined profile
&C set circuit Data Carrier Detect (DCD) function mode
&D set circuit Data Terminal Ready (DTR) function mode
&F set all current parameters to manufacturer defaults
&V display current configuration
&W store current parameter to user-defined profile
Redwing AT Command Summary Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 11 September 29, 2003
Command Description
+CGDCONT=cid,PDP_type,
APN [?]
Define the PDP context. Must be defined before a connection can be
made to the GRPS network. Needs to be configured only once, the
parameters are saved and used each time a connection is made to
the GPRS network.
cid = PDP Context Identifier: numeric parameter that specifies a
PDP context definition.
PDP_type = Packet Data Protocol type = “IP”
APN = Access Point Name a logical name that is used to select the
GGSN or the external packet data network.
Can only be what’s defined on the SIM
AT+CGDCONT = 1,”IP”,”proxy”
AT+CGDCONT = 1,”IP”,”public”
+COPS? Returns the currently selected network operator.
AT+COPS?
AT&T Wireless
OK
+CREG network registration
+GMI request manufacturer identification
+GMM request TA model identification
+GMR request TA revision identification
+GSN request TA serial number identification – International Mobile Equipment
Identification (IMEI)
+ICCID? Returns the 20 digit SIM ID
AT+ICCID?
89310380101024729959
OK
+IPR set fixed local rate
Redwing AT Command Summary Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 12 September 29, 2003
Command Description
+RCIQ? Returns the current cell information.
AT+RCIQ?
Serving Cell Info:
BSIC: 5
TCH: 563
RSSI: -82dBm
LAC: 6035
Cell ID: 4043
Dedicated Channel Info:
TCH: 564
Channel Mode: 0
OK
If there is not coverage, or unit has not yet registered:
AT+RCIQ?
+RCIQ:
Not Registered with Network
BSIC = Base Transceiver Station Identity Code
TCH = Traffic Channel
RSSI = Received Signal Strength Indicator
LAC = Location Area Code
Redwing AT Command Summary Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 13 September 29, 2003
4.2 Redwing AT Command Summary
Following is a summary of all the AT commands for the Redwing GPRS. For more
information on these commands, see AT Command Reference Guide for the RIM
OEM Radio Modem 1902G and 1802G.
Command Description
A/ reissue the last command
+++AT ESC from data mode to command mode
ATA answer a call
ATD mobile-initiated call to dialable number
ATD><mem><n> initiate call to phone number in memory <mem>
ATD><n> initiate call to phone number in current memory
ATD><str> initiate call to phone number in memory with corresponding alphanumeric
field
ATDL redial last telephone number used
ATE set command echo mode
ATH disconnect existing connection
ATI display product identification information
ATL set monitor speaker volume
ATM set monitor speaker mode
ATO switch from command mode to data mode
ATP select pulse dialing
ATQ set result code presentation mode
ATS0 set number of rings before automatically answering the call
ATS1 count the number of incoming rings
ATS2 set the character used to escape from data mode
ATS3 set termination character for a command prompt
ATS4 set response formatting character
ATS5 set editing character for a command prompt
ATS7 set number of seconds to wait for connection to complete
ATS8 set number of seconds to wait when there is a comma dial modifier
ATS10 set disconnection delay after indicating the absence of data carrier
ATS12 set the escape code guard time
ATS13 set the disconnection delay after a call has been terminated
ATV set result code format mode
ATX set CONNECT result code format and call monitoring
Redwing AT Command Summary Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 14 September 29, 2003
Command Description
ATZ set all current parameters to a user-defined profile
AT&C set circuit Data Carrier Detect (DCD) function mode
AT&D set circuit Data Terminal Ready (DTR) function mode
AT&F set all current parameters to manufacturer defaults
AT&V display current configuration
AT&W store current parameter to user-defined profile
AT+DR V.42bis data compression reporting control
AT+DS V.42bis data compression control
AT+GCAP request complete terminal adaptor (TA) capabilities list
AT+GMI request manufacturer identification
AT+GMM request TA model identification
AT+GMR request TA revision identification
AT+GSN request TA serial number identification – International Mobile Equipment
Identification (IMEI)
AT+ICF set terminal equipment to terminal adaptor (TE-TA) control character framing
AT+IFC set TE-TA local data flow control
AT+ILRR set TE-TA local rate reporting mode
AT+IMODE set the interface communication mode
AT+IPR set fixed local rate
AT+CAOC set advice of charge
AT+CBST select bearer service type
AT+CCFC call forwarding number and conditions control
AT+CCUG closed User Group control
AT+CCWA call Waiting Control
AT+CEER extended error report
AT+CGMI request manufacturer identification
AT+CGMM request model identification
AT+CGMR request revision identification
AT+CGSN request product serial number identification (Identical with +GSN)
AT+CSCS select TE Character Set
AT+CSTA select Type of Address
AT+CHLD call hold and multiparty
AT+CIMI request international mobile subscriber identity
AT+CLCC list current calls of ME
Redwing AT Command Summary Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 15 September 29, 2003
Command Description
AT+CLCK facility lock
AT+CLIP calling line identification presentation
AT+CLIR calling line identification restriction
AT+CLVL set the volume
AT+CMEE report mobile equipment error
AT+COLP connected line identification presentation
AT+COPS operator selection
AT+CPAS mobile equipment activity status
AT+CPBF find phone book entries
AT+CPBR read current phone book entries
AT+CPBS select phone book memory storage
AT+CPBW write phone book entry
AT+CPIN enter PIN
AT+CPWD change password
AT+CR service reporting control
AT+CRC set cellular result codes for incoming call indication
AT+CREG network registration
AT+CRLP select radio link protocol parameters for originating non-transparent data call
AT+CSQ signal quality report
4.3 Redwing SMS Command Summary
Command Description
AT+CMGD delete SMS message
AT+CMGF select SMS message format
AT+CMGL list SMS messages from preferred store
AT+CMGR read SMS message
AT+CMGS send SMS message
AT+CMGW write SMS message to memory
AT+CMSS send SMS message from storage
AT+CMGC send SMS Command
AT+CNMI new SMS message indications
AT+CPMS preferred SMS Message Storage
Redwing AT Command Summary Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 16 September 29, 2003
Command Description
AT+CRES restore SMS settings
AT+CSAS save SMS settings
AT+CSCA SMS Service Center Address
AT+CSCB select cell broadcast SMS messages
AT+CSDH show SMS text mode parameters
AT+CSMP set SMS text mode parameters
AT+CSMS select Message Service
4.4 Redwing GPRS Commands
Command Description
AT+CGDCONT define PDP context
AT+CGQREQ quality of service profile (requested)
AT+CGQMIN quality of service profile (minimum acceptable)
AT+CGACT context activation
AT+CGATT GPRS attach or detach
AT+CGPADDR show PDP address
AT+CGCLASS GPRS mobile station class
AT+CGEREP control unsolicited GPRS event reporting
AT+CGREG network registration status
AT+CGSMS select service for MO SMS messages
4.5 RIM Specific AT Commands
Command Description
ATRIMRADIO turn the radio on or off using the software
ATRIMDEVICE perform a hard reset of the modem
AT+ICCID return integrated circuit card identification from the SIM card
AT+RCIQ query cell parameter information
AT+RSCI RIM select coverage indicator. Indicates which network is providing
coverage
Redwing GPRS Technical Specifications Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 17 September 29, 2003
5. Redwing GPRS Technical Specifications
5.1 Physical Characteristics
Weight: < 1 lb.
Size: 3.3” wide x 2” high x 6.8" long
RF Antenna Connector: 50 Ohm TNC
Serial Interface: RS232 DB-9F
Rugged aluminum case
5.2 Power Specifications
Input Voltage: 10 VDC to 28 VDC
Idle Input Current: 20 mA at 12V
Typical Transmit/Receive: 80ma at 12VDC
Max Input Current 150 ma at 12 VDC
5.3 Environmental
Operating ranges: -30°C to +70°C*
(<10%duty cycle limit above 60 °C)
Humidity: 5%-95%Non-condensing
5.4 RF Features
Network: 1900/850 MHz GSM/GPRS
Transmit frequency: 1850-1910 MHz and 824-849 MHz
Receiver frequency: 1930-1990 MHz and 869-894 MHz
Transmit power range at antenna port: 1.0 W for 1900 MHz and
0.8W for 850 MHz
Transmitter can reduce output power when near a base station as per GSM
specifications
Receiver sensitivity: typical -107 dBm (2.2439% bit error rate)
Multislot Class 8
FCC certified (FCC Identifier GGL-R1902G)
Industry Canada certified (certification #4481A-R1902G)
Redwing GPRS Technical Specifications Redwing GPRS User Guide Version 1.08
AirLink Communications, Inc. Page 18 September 29, 2003
5.5 Status LED Display
GSM indicates GSM coverage if +RSCI=0
indicates GPRS coverage if +RSCI=1
Tx indicates the radio is transmitting
Radio The OEM module radio is on and ready to transmit and receive
Pwr The power is on.
5.6 Application Interface Features
RS232, 1200 bps to 115.2 kbps

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