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General Packet Radio Service (GPRS) 

 
Before proceeding, be sure the cellular account SIM is provisioned with GPRS data services and all 
necessary initialization commands have been executed. The module must then be attached to the 
GPRS service, allowing the device to be accessable by the network, but no data transmission is yet 
possible. Before activating the PDP context, network provider specific context parameters have to be 
defined. Afterwards the context can be activated and the module can enter the GPRS data mode. At 
this point data can be exchanged between module and network. 
 
Listed below are initial settings suggested for using GPRS. 
 

AT+CGREG?

 queries the status of GPRS network registration. AT+CREG=1 will enable network 

activation. 
 

AT+CGSMS

 specifies the service or service preferences the MT shall use when sending MO SMS 

messages. AT+CGSMS=0 will select GPRS service. 
 

AT^SGAUTH

 sets the authentication type for the PPP connection. The default value is 3 (PAP and 

CHAP). To configure the LLC-PDU-length and the GPRS multislot class use AT^SGCONF 
 
The 

AT^SCFG

 command is used for the following GPRS related settings. Note that AT^SCFG 

settings illustrated in the examples are valid only if GSM character set is active. 
 

”GPRS/ATS0/withAttach” (on/off) 
Specifies whether or not ME will automatically attempt to perform a GPRS attach after receiving 
the command ATS0=<n> with parameter n>0. 
 
”GPRS/RingOnIncomingData (on/off) 
Specifies if RING line shall be activated when ME receives GPRS IP packets during CYCLIC SLEEP 
mode AT+CFUN=7 or 8. This solution ensures that incoming GPRS IP packets will prompt the 
application to wake up from power saving. 
 
”URC/Ringline/ActiveTime” (0/1/2)

Specifies duration of RING activation to indicate URCs or 

incoming GPRS IP packets. 

 

GPRS Attach/Detach 

 

The 

AT+CGATT

 command enables the ME to attach (=1) or to detach (=0) from the GPRS 

service. If the ME is already in the requested state, the command is ignored and OK response is 
returned. Any active PDP Contexts will automatically be deactivated, if the ME detaches from the 
GPRS service. 
 
If the ME is not able to attach for more than 5 minutes or to detach for more than 1 minute, the 
command returns “ERROR“ or “+CME ERROR: unknown”, but the ME is still trying to attach/ 
detach. 

 

Summary of Contents for SMC-GPRS Series

Page 1: ...S SM MC C G GP PR RS S X XX XX X L andCell SMC Embedded Wireless Modem GSM GPR S Universal Socket User Manual 001 0004 829 Rev00 October 2009...

Page 2: ...REVISION HISTORY Rev00 Released 10 06 2009 C Pollock...

Page 3: ...efine the Packet Data Protocol PDP Context 16 Connect using the Dial Up Network Connection 17 SECTION 6 SIM CARD SPECIFIC INFORMATION 20 What to do if PIN or password authentication fails 21 SECTION 7...

Page 4: ...cations 56 SECTION 12 SERVICE AND SUPPORT 57 Product Warranty RMA and Contact Information 57 RMA Request 57 Product Documentation 57 Technical Support 57 A AP PP PE EN ND DI IX X A A P PO OW WE ER R S...

Page 5: ...and not easily moved to another location Please keep the cellular antenna of the SMC GPRS at a safe distance from your head and body while the modem is in use see below Important Maintain a distance o...

Page 6: ...ular telephones and devices in vehicles Avoid potential interference with vehicle electronics by correctly installing the SMC GPRS CalAmp recommends installation by a professional Related Documents 1...

Page 7: ...ata Terminal Equipment EDGE Enhanced Data rates for Global Evolution GPRS General Packet Radio Service GPS Global Positioning System GSM Global System for Mobile communication IMEI International Mobil...

Page 8: ...socket Quad band GSM GPRS offers compatibility with cellular networks around the world The SMC GPRS embedded modem is ideal for OEM customers looking to add cellular wireless communications to their...

Page 9: ...RS Top Side SMC GPRS top side components 1 Power Green LED indicating cell module power on 2 DCD Red LED indicating Data Carrier Detect from cellular network 3 RF antenna MMCX socket primary antenna c...

Page 10: ...001 0004 829 Rev00 Page 10 of 84 Bottom side reference Fig 2 2 SMC GPRS Bottom Side SMC GPRS bottom side socket pins 1 VCC GND pins 2 Reset GND pins 3 SERIAL pins Figure 2 3 SMC Pins Top View 2 1 3...

Page 11: ...a and transmit commands from the DTE 36 RI Output Ring Indicator Output low ON indicates the presence of a ring signal 37 DSR Output Data Set Ready Line used to indicate modem status to the DTE 38 CTS...

Page 12: ...m an externally supplied 10 to 28 VDC power source 12VDC typical Figure 4 1 SMC modem with DK test board SMC GPRS test board components 1 SMC GPRS modem 2 MMCX to SMA RF cable Provides connection to e...

Page 13: ...S Clear to Send 9 RI Ring Indicator Note Direction is DTE relative DCE Table 4 3 Default RS 232 Communication Parameters Bits Per Second 115 200 Data Bits 8 Parity None Stop Bits 1 Flow Control Hardwa...

Page 14: ...to Appendix B for details on setting up a modem driver for a DUN connection Connecting Up the SMC Test Board Connect the Power cable RS232 cable Antenna cable to the SMC test board as shown in Figure...

Page 15: ...T commands listed below Confirm your SIM card is properly installed with the AT SCID command A reply of SCID 20 digit CID number indicates the modem recognizes the SIM card and displays it s ID number...

Page 16: ...e Packet Data Protocol PDP Context Next the Access Point Name APN must be defined using the PDP Context command AT CGDCONT 1 IP apn command The apn is the access point name for a specific cellular pro...

Page 17: ...tion Go to the Network Connections screen and double click on the newly created Dial Up connection i e SMC GPRS When the connect window appears set the username and password as defined for your carrie...

Page 18: ...o not match the DUN will not be able to talk to the modem properly and you will get a hardware error message Otherwise the DUN will contact the cellular network and authenticate the user on the networ...

Page 19: ...829 Rev00 Page 19 of 84 Right click on the connected Dial Up connection icon and select the Details tab The status of the connection will be displayed including the IP address assigned by the carrier...

Page 20: ...ed password was a Pin Unlock Code PUK such as SIM PUK1 or PH FSIM PUK or another password then pin must be followed by new pin new pin If the requested code was a PUK specify a new password or restore...

Page 21: ...y the GSM code 052 PUK2 newPIN2 newPIN2 Phone lock If the mobile was locked to a specific SIM card PS lock or phone lock the PUK that came with the SIM card cannot be used to remove the lock After thr...

Page 22: ...ard or to lift the lock The code can only be obtained from the provider Failure to enter the password is subject to the same timing algorithm as the Master Phone Code see Table above Call barring Supp...

Page 23: ...ONNECT result code will include the transmission speed The ATS0 command specifies the number of rings before the ME automatically answers incoming data calls ATS0 3 sets the SMC modem to answer on the...

Page 24: ...data call can be accepted by entering the command ATA or by using the autoanswer mode if enabled with ATS0 000 Depending on the module s basic initialization connection setup is indicated by the resul...

Page 25: ...ngth and the GPRS multislot class use AT SGCONF The AT SCFG command is used for the following GPRS related settings Note that AT SCFG settings illustrated in the examples are valid only if GSM charact...

Page 26: ...CGACT 1 or AT CGACT 0 all defined contexts become activated deactivated In many networks AT CGACT 1 does not work any longer Many networks require user name and password for context activation Howeve...

Page 27: ...of text mode parameters in the result codes of SMS reading and listing commands AT CSMP command changes the text mode parameters You can set the following SMS parameters first octet service center tim...

Page 28: ...CMGW Write SMS message to memory Reading SMS AT CMGL List SMS messages from preferred storage AT SMGL List SMS messages from preferred storage does not change status AT CMGR Read SMS message AT SMGR R...

Page 29: ...parameter srvParmTag This offers great flexibility to combine connection profiles and service profiles For example you may have one connection profile CSD or GPRS specified with AT SICS which can be a...

Page 30: ...ending or receiving emails over a GPRS connection enabled by the TCP IP stack while at the same time surfing the Internet over a Dial Up Network GPRS connection Address notation Server addresses must...

Page 31: ...ding on whether or not PIN authentication has been done AT W Stores the currently set parameters to a user defined profile in the non volatile memory The user defined profile will be restored automati...

Page 32: ...Identification Commands ATI Display product identification Example SIEMENS TC65 REVISION 02 000 AT CGSN Request International Mobile Equipment Identity IMEI This is the module IMEI number located on t...

Page 33: ...NOM Network Operation Mode 1 3 TA Timing Advance Value RAC Routing Area Code as hexadecimal value GPRS Service Commands AT CGACT PDP context activate or dactivate Read command returns the current act...

Page 34: ...saved in a profile will be available until you power down the modem These settings are lost upon powerdown if not saved For further information refer to the Cinterion TC63i AT Command Set document ava...

Page 35: ...ing at called phone DIALING Mobile phone is dialing SYSSTART Modem power up indication Configuration Commands These commands control the basic configuration of the modem The parameters can only be rea...

Page 36: ...n also be used to temporarily wake up the ME AT CFUN 1 1 will re start the SMC modem and clear volitile memory AT SMSO Initiates the power off procedure AT GCAP Request complete TA capabilities list A...

Page 37: ...of Indicator Event Reports related to various functions such as battery charge level signal quality service availability sound generation indication of unread short messages full SMS storage call in p...

Page 38: ...minal Ready DTR function mode 0 TA ignores status of DTR 1 ON OFF on DTR Change to command mode while retaining the connected call 2 ON OFF on DTR Disconnect data call change to command mode During st...

Page 39: ...ommands described in this section allow the external application to determine various security related settings Table 10 6 Security Commands Command Description AT CPIN PIN Authentication AT CPIN comm...

Page 40: ...s Table 10 8 Call Related Commands Command Description ATA Answer a call TA causes remote station to go off hook e g answer call ATD Mobile originated call to specified number This command can be used...

Page 41: ...ted as data it must be preceded and followed by a pause of at least 1000 ms The characters must be entered in quick succession all within 1000 ms AT CBST Select bearer service type AT CBST speed speed...

Page 42: ...work services For futher information refer to the Cinterion TC63i AT Command Set document available from Cinterion 2 Table 10 9 Network Service Commands Command Description AT COPN Read operator names...

Page 43: ...tion Optional parameters lac and ci will not be displayed during calls or if these values have not changed since last AT CREG read command or since last indication by CREG URC AT CSQ Signal quality Th...

Page 44: ...of the preferred operators If index is given but operator is left out the entry is deleted An operator can be only once in the list AT CPOL index 2 operator index The order number of the operator in...

Page 45: ...to create and edit Internet connection profiles AT SISS Internet Service Setup Profile The command serves to set up the necessary parameters in the Internet service profiles AT SISE Internet Service E...

Page 46: ...first performs a GPRS attach and then attempts to activate the specified contexts If no cid s are specified the activation deactivation form of the command activates deactivates all defined contexts 0...

Page 47: ...2 protocols to be used between the TE and MT The write command causes the MT to perform all actions which are necessary to establish communication between the TE and the network using one or more GPR...

Page 48: ...T SGACT Query all PDP context activations The test command returns supported interfaces and states The read command lists the activation states for all activated PDP contexts of the ME Contexts which...

Page 49: ...matic answering after specified number of rings Short Message Service SMS Commands The AT Commands described in this section allow an external application to use the Short Message Service with the mod...

Page 50: ...SIM database is restricted to the commands which are listed 176 READ BINARY 178 READ RECORD 192 GET RESPONSE 214 UPDATE BINARY 220 UPDATE RECORD 242 STATUS AT SXSM Extended SIM Access AT SXSM extends...

Page 51: ...time SMC modem is restarted it takes 2s to re initialize the RTC and to update the current time Therefore it is recommended to wait 2s before using the commands AT CCLK and AT CALA for example 2s aft...

Page 52: ...p 0 disp 0 ind 0 bfr 0 AT CIND mode 1 ATS18 n 0 Serial Interface Control Commands AT Q n 0 AT C value 1 AT D value 2 AT S value 0 ATE value 1 AT ILRR value 0 AT STPB n 0 Call related Commands ATS0 n 0...

Page 53: ...d 0 AT CSMS service 0 AT SMGO n 0 AT SSCONF ra 0 AT SSDA da 0 AT SSMSS seq 0 SIM related Commands AT SCKS mode 0 AT SSET n 0 Hardware related Commands AT SCTM n 0 AT SSPI connectionState 0 delayOne 0...

Page 54: ...r GSM GPRS 33 dBm min 30 dBm min 1900MHz Rx Sensitivity GSM GPRS 108 dBm typical 102 dBm min Frequencies Cellular TX 824 849 MHz Rx 869 894 MHz PCS TX 1850 1910 MHz Rx 1930 1990 MHz Temperature Operat...

Page 55: ...TCP UDP HTTP FTP SMTP POP3 GPRS Data Transmission GPRS Class 12 Mobile Station Class B PBCCH support Coding scheme CS 1 4 CSD Data Transmission Up to 14 4 kbps V 110 Non transparent mode USSD support...

Page 56: ...s in detail the exterior dimensions of the SMC GPRS All of the drawings below are the approximate actual size The drawings may be used as layout reference but it is advised that a physical comparison...

Page 57: ...AND WHEN CALLING When returning a product mark the RMA clearly on the outside of the package Include a complete description of the problem and the name and telephone number of a contact person RETURN...

Page 58: ...pprox 2W the power supply current is modulated with 2A approx pulses of 0 577ms every 4 6ms During the receive only time period current GSM call consumption is lower than 100mA An example current prof...

Page 59: ...n to 3 9VDC for the cell module SMC GPRS Power Supply Requirements The SMC GPRS modem is designed with a 3A linear supply with two 100uF capacitors on the output The 5VDC input voltage level should no...

Page 60: ...big capacitor and a power supply circuit With this solution power is supplied from both the capacitor and the external regulator C Icap x dT dU Icap Amps current required by capacitor dU Volts voltag...

Page 61: ...004 829 Rev00 Page 61 of 84 A AP PP PE EN ND DI IX X B B C CR RE EA AT TI IN NG G A A D DI IA AL L U UP P N NE ET TW WO OR RK KI IN NG G C CO ON NN NE EC CT TI IO ON N Windows XP Add Standard Windows...

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Page 65: ...001 0004 829 Rev00 Page 65 of 84 Configuring the Modem...

Page 66: ...001 0004 829 Rev00 Page 66 of 84 Create a Dial Up Networking DUN Connection...

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Page 73: ...001 0004 829 Rev00 Page 73 of 84 Windows Vista Add Standard Windows Modem Go to the Control Panel and select Phone and Modem...

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Page 75: ...001 0004 829 Rev00 Page 75 of 84 Choose the COM port to be connected to the modem...

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Page 77: ...001 0004 829 Rev00 Page 77 of 84 Configuring the Modem...

Page 78: ...001 0004 829 Rev00 Page 78 of 84 Create a Dial Up Networking DUN Connection Choose Set up a connection or Network...

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Page 80: ...001 0004 829 Rev00 Page 80 of 84 Set the Dial up phone number as 99 1 and add the Username and Password if required Choose a connection name...

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Page 84: ...orth in this paragraph fulfills any and all warranty obligations on the part of DRL This warranty is void and DRL shall not be obligated to replace or repair any Products if i the Product has been use...

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