5.1.3.1.17. Extended S Registers Display - &V3................................................................................................................... 41
5.1.3.1.18. Display Last Connection Statistics - &V2 ........................................................................................................... 41
5.1.3.1.19. Single Line Connect Message - \V ...................................................................................................................... 41
5.1.3.1.20. Country Of Installation - +GCI ............................................................................................................................ 42
5.1.3.1.21. Line Signal Level - %L........................................................................................................................................ 42
5.1.3.1.22. Line Quality - %Q ............................................................................................................................................... 42
5.1.3.1.23. Speaker Loudness - L .......................................................................................................................................... 42
5.1.3.1.24. Speaker Mode - M ............................................................................................................................................... 42
5.1.3.2. DTE - Modem Interface Control ................................................................................................................................. 43
5.1.3.2.1. Command Echo - E ............................................................................................................................................... 43
5.1.3.2.2. Quiet Result Codes - Q .......................................................................................................................................... 43
5.1.3.2.3. Response Format - V ............................................................................................................................................. 44
5.1.3.2.4. Extended Result Codes - X .................................................................................................................................... 45
5.1.3.2.5. Identification Information - I ................................................................................................................................. 45
5.1.3.2.6. Data Carrier Detect (DCD) Control - &C .............................................................................................................. 46
5.1.3.2.7. Data Terminal Ready (DTR) Control - &D ........................................................................................................... 46
5.1.3.2.8. Standard Flow Control - \Q ................................................................................................................................... 47
5.1.3.2.9. Flow Control - &K ................................................................................................................................................ 47
5.1.3.2.10. Data Set Ready (DSR) Control - &S ................................................................................................................... 47
5.1.3.2.11. Ring (RI) Control - \R ......................................................................................................................................... 48
5.1.3.2.12. Fixed DTE Interface Rate - +IPR ........................................................................................................................ 48
5.1.3.2.13. DTE-Modem Local Flow Control - +IFC ............................................................................................................ 50
5.1.3.2.14. DTE-Modem Character Framing - +ICF ............................................................................................................. 50
5.1.3.3. Call Control ................................................................................................................................................................ 52
5.1.3.3.1. Dial - D .................................................................................................................................................................. 52
5.1.3.3.2. Tone Dial - T ......................................................................................................................................................... 54
5.1.3.3.3. Pulse Dial - P ......................................................................................................................................................... 54
5.1.3.3.4. Answer - A ............................................................................................................................................................ 54
5.1.3.3.5. Disconnect - H ....................................................................................................................................................... 54
5.1.3.3.6. Return To On Line Mode - O ................................................................................................................................ 55
5.1.3.4. Modulation Control .................................................................................................................................................... 55
5.1.3.4.1. Line Quality And Auto Retrain - %E .................................................................................................................... 55
5.1.3.5. Compression Control .................................................................................................................................................. 55
5.1.3.5.1. Data Compression - +DS ....................................................................................................................................... 55
5.1.3.5.2. Data Compression Reporting - +DR ...................................................................................................................... 56
5.1.3.6. S Parameters ............................................................................................................................................................... 57
5.1.3.6.1. Number Of Rings To Auto Answer - S0 ............................................................................................................... 57
5.1.3.6.2. Ring Counter - S1 .................................................................................................................................................. 57
5.1.3.6.3. Escape Character - S2 ........................................................................................................................................... 58
5.1.3.6.4. Command Line Termination Character - S3 .......................................................................................................... 58
5.1.3.6.5. Response Formatting Character - S4 ..................................................................................................................... 59
5.1.3.6.6. Command Line Editing Character - S5 .................................................................................................................. 60
5.1.3.6.7. Connection Completion Time-Out - S7 ................................................................................................................. 60
5.1.3.6.8. – Carrier Off With Firm Time - S10 ...................................................................................................................... 60
5.1.3.6.9. – Escaper Prompt Delay - S12 ............................................................................................................................... 60
5.1.3.6.10. Delay To DTR Off - S25 ..................................................................................................................................... 62
5.1.4. 3GPP TS 27.007 AT Commands .................................................................................................................... 63
5.1.4.1. General ....................................................................................................................................................................... 63
5.1.4.1.1. Request Manufacturer Identification - +CGMI ..................................................................................................... 63
5.1.4.1.2. Request Model Identification - +CGMM .............................................................................................................. 63
5.1.4.1.3. Request Revision Identification - +CGMR ............................................................................................................ 63
5.1.4.1.4. Request Product Serial Number Identification - +CGSN ...................................................................................... 63
5.1.4.1.5. Select TE Character Set - +CSCS .......................................................................................................................... 64
5.1.4.1.6. International Mobile Subscriber Identity (IMSI) - +CIMI ..................................................................................... 64
5.1.4.1.7. Multiplexing Mode - +CMUX ............................................................................................................................... 65
5.1.4.1.8. Read ICCID - +CCID ............................................................................................................................................ 65
5.1.4.2. Call Control ................................................................................................................................................................ 66
5.1.4.2.1. Hang Up Call - +CHUP ......................................................................................................................................... 66