3.9.2. Embedded DTMF Decoder & TTY 512
3.9.2.1. AT#DTMF - Embedded DTMF Decoder Enabling 512
3.9.3. Digital Voice Interface 514
3.9.3.1. AT#DVI - Digital Voiceband Interface 514
HW and Radio Control 516
3.10.1. AT#CBC - Battery and Charger Status 516
3.10.2. AT#TEMPCFG - Temperature Monitor Configuration 518
3.10.3. AT#GPIO - General Purpose Input/Output Pin Control 526
3.10.4. AT#ALARMPIN - Alarm Pin Configuration 532
3.10.5. AT#SLED - STAT_LED GPIO Setting 534
3.10.6. AT#SLEDSAV - Save STAT_LED GPIO Setting 537
3.10.7. AT#ADC - Read Analog/Digital Converter Input 538
3.10.8. AT#V24CFG - V24 Output Pins Configuration 540
3.10.9. AT#V24 - V24 Output Pins Control 542
3.10.10. AT#I2CWR - Write to I2C 544
3.10.11. AT#I2CRD - Read from I2C 546
3.10.12. AT#I2CCF - Combined Format for I2C Writing and Reading548
3.10.13. AT#TEMPMON - Temperature Monitor 551
3.10.14. AT#TESTMODE - Test Mode Configuration 555
Power Down 562
3.11.1. AT#REBOOT - Module Reboot 562
3.11.2. AT#ENHRST - Periodic Reset 563
3.11.3. AT#SHDN - Software Shutdown 565
3.11.4. AT#SYSHALT - System Turn-Off 566
3.11.5. AT#FASTSHDN - Fast Shutdown Configuration 568
3.11.6. AT#DGEN - Dying GASP Configuration 570
Easy Scan 576
3.12.1. AT#CSURV - Network Survey 576
3.12.2. AT#CSURVC - Network Survey (Numeric Format) 583
3.12.3. AT#CSURVF - Network Survey Format 587
3.12.4. AT#CSURVNLF - Network Survey CR LF Removing 589
3.12.5. AT#CSURVEXT - Extended Network Survey 590