Falcom SAMBA75 GSM-STICKPHONE User Manual Vorlage f r Dokumente
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![SAMBA 75 USER’S GUIDE VERSION 1.01 5 GSM/GPRS APPLICATION INTERFACE 5.1 Description of operating modes The chapter below briefly summarizes the various operating modes referred to the following chapters. Definition of the GPRS class B mode of operation: The definition of GPRS class B mode is, that the MS can be attached to both GPRS and other GSM services, but the MS can only operate one set of services at a time. Class B enables making or receiving a data call, or sending/receiving a SMS during a GPRS connection. During data calls or SMS, GPRS services are suspended and then resumed automatically after the call or SMS session has been ended. 5.1.1 Normal mode operation 5.1.1.1 GSM/GPRS SLEEP Various power save modes set with AT+CFUN command, see related documents [3]. Software is active to minimum extent. If the module was registered to the GSM network in IDLE mode, it is registered and paging with the BTS in SLEEP mode, too. Power saving can be chosen at different levels: The NON-CYCLIC SLEEP mode (AT+CFUN=0) disables the AT interface. The CYCLIC SLEEP modes AT+CFUN=5,6,7,8 and 9 alternatively activate and deactivate the AT interfaces to allow permanent access to all AT commands. 5.1.1.2 GSM IDLE Software is active. Once registered to the GSM network, paging with BTS is carried out. The module is ready to send and receive. 5.1.1.3 GPRS/EDGE IDLE Module is ready for GPRS/EDGE data transfer, but no data is currently sent or received. Power consumption depends on the network settings and the GPRS/EDGE configuration (e.g. multislot settings). 5.1.1.4 GPRS/EDGE DATA GPRS/EDGE data transfer in progress. Power consumption depends on the network settings (e.g. power control level), uplink/downlink data rates and GPRS/EDGE the configuration (e.g. used multislot settings). 5.1.2 Power down Normal shutdown after sending the AT^SMSO command. The Power Supply ASIC (PSU-ASIC) disconnects the supply voltage from the base band part of the circuit. Only a voltage regulator in the PSU-ASIC is active for powering the RTC. Software is This confidential document is a property of FALCOM GmbH and may not be copied or circulated without previous permission. Page 18](https://usermanual.wiki/Falcom/SAMBA75/User-Guide-598799-Page-19.png)
![SAMBA 75 USER’S GUIDE VERSION 1.01 not active. The serial interfaces are not accessible. Operating voltage remains applied. 5.1.3 Alarm mode Alarm mode restricted operation launched by RTC alert function while the module is in POWER DOWN mode. Module will not be registered to GSM network. Limited number of AT commands is accessible. 5.2 Power Up / Power Down Scenarios In general, be sure not to turn on SAMBA 75 while it is beyond the safety limits of voltage and temperature. SAMBA 75 would immediately switch off after having started and detected these inappropriate conditions. In extreme cases this can cause permanent demage to the module. 5.2.1 Turn on SAMBA 75 SAMBA 75 can be started in a variety of ways as described in the following sections: • Power up the modem by connecting it to a PC’s USB port (see section 6.2.1.1) • Software controlled reset by AT+CFUN command (see section 5.2.1.1) After startup or mode change the following URCs indicate the module’s ready state: • “^SYSSTART” indicates that the module has entered Normal mode. Detailed explanations on AT^SCFG, AT+CFUN, AT+CALA can be found in [3]. 5.2.1.1 Reset SAMBA 75 via AT+CFUN Command To reset and restart the SAMBA 75 use the command AT+CFUN. You can enter AT+CFUN=,1 or AT+CFUN=x,1, where x may be in the range from 0 to 9. See [3] for details. If configured to a fix baud rate (AT+IPR≠0), the modem will send the URC “^SYSSTART” to notify that it is ready to operate. If autobauding is enabled (AT+IPR=0) there will be no notification. To register to the network SIM PIN authentication is necessary after restart. 5.2.2 Turn off SAMBA 75 SAMBA 75 can be turned off as follows: • Normal shutdown: Software controlled by AT^SMSO command • Automatic shutdown: Takes effect if board temperature is out of range or if undervoltage or overvoltage conditions occur. 5.2.2.1 Turn off SAMBA 75 Using AT Command The best and safest approach to powering down SAMBA 75 is to issue the AT^SMSO command. This procedure lets SAMBA 75 log off from the network and allows the software to enter into a secure state and safe data before disconnecting the power This confidential document is a property of FALCOM GmbH and may not be copied or circulated without previous permission. Page 19](https://usermanual.wiki/Falcom/SAMBA75/User-Guide-598799-Page-20.png)
![SAMBA 75 USER’S GUIDE VERSION 1.01 supply. The mode is referred to as Power-down mode. In this mode, only the RTC stays active. Before switching off the device sends the following response: ^SMSO: MS OFF OK ^SHUTDOWN After sending AT^SMSO do not enter any other AT commands. There are two ways to verify when the module turns off: • Wait for the URC “^SHUTDOWN”. It indicates that data have been stored non-volatile and the module turns off in less than 1 second. Be sure not to disconnect the supply voltage (SMABA75 modem) before the URC “^SHUTDOWN” has been issued. Otherwise you run the risk of losing data. While SAMBA 75 is in Power-down mode the application interface is switched off. 5.2.3 Automatic Shutdown Automatic shutdown takes effect if • the SAMBA 75 board is exceeding the critical limits of overtemperature or undertemperature The automatic shutdown procedure is equivalent to the Power-down initiated with the AT^SMSO command, i.e. SAMBA 75 logs off from the network and the software enters a secure state avoiding loss of data. Alert messages transmitted before the device switches off are implemented as Unsolicited Result Codes (URCs). The presentation of these URCs can be enabled or disabled with the two AT commands AT^SBC and AT^SCTM. For further instructions of the AT commands refer to [3]. 5.3 Automatic EGPRS/GPRS Multislot Class Change Temperature control is also effective for operation in EGPRS Multislot Class 10, GPRS Multislot Class 10 and GPRS Multislot Class 12. If the board temperature increases to the limit specified for restricted operation1) while data are transmitted over EGPRS or GPRS, the module automatically reverts: • from EDGE Multislot Class 10 (2 Tx slots) to EEDGE Multislot Class 8 (1 Tx), • from GPRS Multislot Class 12 (4 Tx slots) to GPRS Multislot Class 8 (1 Tx) • from GPRS Multislot Class 10 (2 Tx slots) to GPRS Multislot Class 8 (1 Tx) This reduces the power consumption and, consequently, causes the board’s temperature to decrease. Once the temperature drops to a value of 5 degrees below the limit of restricted operation, SAMBA 75 returns to the higher Multislot Class. If the temperature stays at the critical level or even continues to rise, SAMBA 75 will not switch back to the higher class. After a transition from EGPRS Multislot Class 10 to EGPRS Multislot Class 8 a possible switchback to EGPRS Multislot Class 10 is blocked for one minute. The same applies when a transition occurs from GPRS Multislot Class 12 or 10 to GPRS Multislot Class 8. Please note that there is not one single cause of switching over to a lower Multislot Class. Rather it is the result of an interaction of several factors, such as the board temperature that depends largely on the ambient temperature, the operating mode and the transmit power. Furthermore, take into account that there is a delay until the network proceeds to a lower or, accordingly, This confidential document is a property of FALCOM GmbH and may not be copied or circulated without previous permission. Page 20](https://usermanual.wiki/Falcom/SAMBA75/User-Guide-598799-Page-21.png)
![SAMBA 75 USER’S GUIDE VERSION 1.01 To have a connection to the GPRS Network (see also related documents [5]), on the next opened window screen, choose the Advanced tab. On the “Extra Settings”, type the APN information here. (Consult your Network Operator for the correct APN settings) Common setting is: AT+CGDCONT=1,”IP”,”INTERNET” e.g T-D1 has the following APN: [AT+CGDCONT=1,”IP”,”internet.t-d1.de”]. To test the modem, if it is properly working select the Diagnosis tab and click the Query modem button. If the modem responses then the modem is ready for use. Click OK button to close the opened windows. To communicate with the SAMBA 75 phone by using the AT-Commands start the HyperTerminal program (see figure in subsection below) or another terminal program. The AT-Command Set is also included in the delivery CD. See related documents [3]. 6.2.1.2 Setup HyperTerminal program: START – PROGRAMS – ACCESSORIES –COMMUNICATION – HYPERTERMINAL, then start the software HYPERTRM, assign the name of your choice, click on the icon of your choice, then click on OK, then choose: Connect using: e.g. COM1 (allocated COM port, read from SAMBA 75 modem properties) Properties: choose upto 230500 bps – 8 bits data – no parity – 1 stop bit – hardware flow control Click on OK. Once HyperTerminal is opened and configured, it can be used to send AT commands to the SAMBA 75 phone. To test the SAMBA 75 phone type on the terminal screen: AT<enter> Modem responds: OK This confidential document is a property of FALCOM GmbH and may not be copied or circulated without previous permission. Page 25](https://usermanual.wiki/Falcom/SAMBA75/User-Guide-598799-Page-26.png)
