Neo_M660 AT Command SetCopyright © Neoway Technology Co., Ltd iv4.12 Setting Echo Suppression Level in the Receiver Mode: +HESL ............................................................. 234.13 Setting Echo Suppression Level of the Loud Speaker Mode: +LESL ..................................................... 234.14 MIC Volume Control: +MICL.................................................................................................................. 244.15 Switching the Audio Input Channel: +AUDIN ........................................................................................ 244.16 Switching the Audio Output Channel: +AUDIN...................................................................................... 255 SMS Commands ..................................................................................................................... 265.1 Selecting SMS Services: CSMS ................................................................................................................. 265.2 Setting Preferred SMS Storage: +CPMS.................................................................................................... 265.3 Setting SMS Inputting Mode: +CMGF ...................................................................................................... 275.4 Setting the TE Character Set: +CSCS ........................................................................................................ 285.5 Setting the SMS Instruction Mode: +CNMI .............................................................................................. 285.6 Reading SMS Messages: +CMGR ............................................................................................................. 305.7 SMS Message List: +CMGL ...................................................................................................................... 315.8 Sending SMS Messages: +CMGS .............................................................................................................. 335.9 Writing SMS Messages: +CMGR .............................................................................................................. 345.10 Sending Stored SMS Messages: +CMSS ................................................................................................. 345.11 Deleting SMS Messages: +CMGD .......................................................................................................... 355.12 Setting the SMS Center Number: +CSCA ............................................................................................... 355.13 Setting the Parameters of the Text Mode: +CSMP ................................................................................... 365.14 Displaying the Parameters of the Text Mode: +CSDH ............................................................................ 375.15 Selecting the Type of Cell Broadcast Messages: +CSCB ........................................................................ 376 Phonebook Commands ......................................................................................................... 386.1 Selecting Phonebook Storage: +CPBS ....................................................................................................... 386.2 Reading the Phonebook: +CPBR ............................................................................................................... 396.3 Querying the Phonebook: +CPBF .............................................................................................................. 406.4 Writing Information to the Phonebook: +CPBW ....................................................................................... 406.5 Reading My Number: +CNUM.................................................................................................................. 417 Supplementary Service Commands ................................................................................... 417.1 Call Forwarding: +CCFC ........................................................................................................................... 417.2 Call Waiting: +CCWA ................................................................................................................................ 437.3 Call Holding and Multi-party Conversation: +CHLD ................................................................................ 448 GPRS Commands ................................................................................................................... 448.1 Setting PDP Format: CGDCONT .............................................................................................................. 448.2 Sending USSD Data: +CUSD .................................................................................................................... 468.3 Switching Data Mode to Command Mode: +++ ........................................................................................ 478.4 Switching Command Mode to Data Mode: ATO ....................................................................................... 479 TCP/UDP Data Service .......................................................................................................... 479.1 Setting Network APN: +NETAPN ............................................................................................................. 479.2 Setting Up a PPP Link: +XIIC ................................................................................................................... 489.3 Setting Up TCP Connection: +TCPSETUP ............................................................................................... 49