<strong>GM862</strong>-<strong>GPS</strong> <strong>Software</strong> <strong>User</strong> <strong>Guide</strong>1vv0300729 Rev. 4 - 24/01/07For example:1- Let's assume you have to call the national number 040 - 4192111,<strong>com</strong>mand:ATD 0404192111responseOK2- Let's assume you have to call the national number but in international format +39-40-4192111,<strong>com</strong>mand:ATD +39404192111responseOK3- Let's assume you have to call the international number +386-40-4192111 without previously settingthe +FCLASS=8 (voice),<strong>com</strong>mand:ATD +386404192111;responseOK2.6.3 Closing the voice call2.6.3.1 Hang up the voice call• Send <strong>com</strong>mand ATH• wait for response OKTIP: during the voice call the device remains in <strong>com</strong>mand mode, so the escape sequence (+++)must not be issued before sending <strong>com</strong>mands.Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 22 of 111
<strong>GM862</strong>-<strong>GPS</strong> <strong>Software</strong> <strong>User</strong> <strong>Guide</strong>1vv0300729 Rev. 4 - 24/01/072.7 Placing a CSD Data call (not GPRS)Before a data call can be placed, it is re<strong>com</strong>mended to check if the mobile is registered on a network(see par. 2.5.3.1) and if the signal strength is enough to ensure that a call can be made (see par.2.5.3.2).2.7.1 Data call device set up2.7.1.1 Set the device in data mode• Send <strong>com</strong>mand AT+FCLASS=0• wait for OK responseTIP: The +FCLASS setting is maintained in memory, so there's no need to repeat this <strong>com</strong>mandif +FCLASS setting is not changed.2.7.1.2 Set the desired modulation and speed for the connectionThe data connection can be made using different modulations at different speeds.This connection mode can be selected with the <strong>com</strong>mand +CBST. The syntax for the <strong>com</strong>mand is:AT+CBST=,0,These parameters can be selected as seen in the table:Command Modulation Speed[bps]ConnectionElementAT+CBST==0, 0, 1 Autobauding ---- non transparentAT+CBST==1, 0, 1 V.21 300 non transparentAT+CBST==2, 0, 1 V.22 1200 non transparentAT+CBST==3, 0, 1 V.23 1200/75 non transparentAT+CBST==4, 0, 1 V.22Bis 2400 non transparentAT+CBST==6, 0, 1 V.32 4800 non transparentAT+CBST==7, 0, 1 V.32 9600 non transparentAT+CBST==14, 0, 1 V.34 14400 non transparentAT+CBST==65, 0, 1 V.110 300 non transparentAT+CBST==66, 0, 1 V.110 1200 non transparentAT+CBST==68, 0, 1 V.110 / X.31 2400 non transparentAT+CBST==70, 0, 1 V.110 / X.31 4800 non transparentAT+CBST==71, 0, 1 V.110 / X.31 9600 non transparentAT+CBST==75, 0, 1 V.110 / X.31 14400 non transparentReproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 23 of 111