CDMA 1xEV-D0 AT Commands Reference Guide
Copyright and Technical Support CDMA 1xEV-D0 AT Commands Reference Guide for the following products: SocketModem® (MTSMC-EV2) MultiModem® Cell (MTCBA-EV2) MultiModem® iCell (MTCMR-EV2) MultiModem® rCell (MTCBA-EV2-EN2) PN S000482B, Version B Copyright This publication may not be reproduced, in whole or in part, without prior expressed written permission from MultiTech Systems, Inc. All rights reserved. Copyright © 2010 by Multi-Tech Systems, Inc. Multi-Tech Systems, Inc.
Table of Contents Contents Chapter 1 – Introduction ...............................................................................................................................7 Document Structure ...................................................................................................................................7 Conventions ...............................................................................................................................................7 Modem Basics.........
Table of Contents Chapter 4 – $ Prefix Commands ................................................................................................................28 $QCCAV Answer Voice .........................................................................................................................28 $QCMIP Mobile IP (MIP) Behavior .......................................................................................................
Table of Contents Chapter 11 – +W Prefix Commands...........................................................................................................44 +WGETWK Request Wake-Up Reason ................................................................................................44 +WWKUP= Wake-Up Events Mask .......................................................................................................44 Chapter 12 – No Prefix Commands .........................................................
Table of Contents Establishing the Airlink .........................................................................................................................62 Initializing the Airlink .............................................................................................................................62 Pass through and Reflection ................................................................................................................63 Closing the Airlink .............................
Chapter 1 – Introduction Chapter 1 – Introduction Document Structure Following this introduction is a section on basic elements important to understanding and communicating with the modem. This includes discussions of the QNC (Quick Net Connect) call setup process and interaction with the CDMA Interworking Function (IWF), as well as notes on the connection between the host (DTE) and the Wireless modem (DCE).
Chapter 1 – Introduction The default settings are noted in the command tables. Note that these are the factory default settings and not the default parameter value assumed if no parameter is specified. The factory defaults are also noted in a section at the end of each operational mode reference. Result Code – This is a numeric or text code that is returned after all commands (except resets).
Chapter 1 – Introduction When using IS 95, there is special handling of AT commands. For a detailed explanation, consult Appendix A Where traditional wire line has only the local host and modem on one side, the CDMA IS-95 model requires two modems on the local side: the IWF and the Wireless radio modem. These two modems must work as a team to make a data connection. For Internet connections, the interworking function can use a special feature called QNC (Quick Net Connect).
Chapter 1 – Introduction An alternate (and more common) method is to place a QNC call by dialing a special number provided by your carrier. QNC provides a mechanism to connect to the Internet using PPP, without using an intermediate modem. This is functionally identical to using Dial-Up Networking for a PPP connection to an Internet Service Provider (TCP/IP) on a standard landline modem. QNC offers a faster call connection time than standard CSC calls. This is also available in IS-95 coverage.
Chapter 1 – Introduction In the online condition, the modem can be: • • In data state, which passes data through the modem between the host (DTE) and the remote terminal or network. In pass through state (IS-95B), which exchanges commands and replies between the host (DTE) and the IWF modem (DCE). The data is not sent all the way through the active connection to the remote terminal. The remote connection is still active (carrier is maintained) but data is not forwarded to the remote end.
Chapter 1 – Introduction Data Buffers Data being transmitted or received is buffered in several ways depending on the mode and nature of the connection. Some caution must be taken when disconnecting to ensure that any buffered data in the modem has been properly processed prior to breaking the connection. Specific settings for buffer controls are described in the relevant commands and registers. Normal configuration of the modem does not require you to adjust these settings.
Chapter 1 – Introduction Responses and Result Codes Most commands return only a result code however some commands request information, which is provided by the modem as a response prior to the result code. Possible Result Codes Result codes are not shown in the command tables unless special conditions apply. Generally the result code OK is returned when the command has been executed.
Chapter 1 – Introduction Result Code Framing Every command returns a result code unless the Quiet command is enabled. If Quiet (Q) is on (=1), then there are no framing characters nor any result code returned; the modem is truly silent with respect to result codes. A leading is inserted ahead of the result code if Verbose (V) is on (=1), otherwise there are no leading characters prior to the ASCII numeral result. The result code is always followed by a .
Chapter 2 – Overview of Commands Chapter 2 – Overview of Commands Introduction The modem supports commands for: • IS 95B data service • 1X packet service • SMS • GPS (See Universal IP AT Commands Guide) AT Commands Summary by Function The reference tables are presented in strict ASCII alphabetical order (including prefixes). This format allows quick look-up of each command to verify syntax, parameters, and behaviors.
Chapter 2 – Overview of Commands Command +ICF +ILRR +IPR +MA +MR +MS +MV18R +MV18S +WWKUP E L M P Q S T V X -HDSET -TONDUR Description Character Framing Local Rate Reporting Fixed Port (Rm) Rate Modulation Auto mode Modulation Reporting Modulation Selection V.18 Reporting V.
Chapter 2 – Overview of Commands Account Activation Commands The modem supports modem account activation via the AT command interface.
Chapter 3 – ! Prefix Commands Chapter 3 – ! Prefix Commands Result codes are not shown in the following commands unless special conditions apply. Generally, the result code OK is returned when the command has been executed. ERROR may be returned if parameters are out of range and is returned if the command is not recognized or is not permitted in the current state or condition of the modem. A full list of result codes (verbose and numeric) is provided in the Result Code Table later in this manual.
Chapter 3 – ! Prefix Commands !DSMS= Delete SMS (Selective) Syntax: !DSMS=[,m] Description: Deletes one or all messages from one of the index lists (for the definitions of the SMS index lists, see !CNTSMS). Parm Meaning i Message list (index 1, 2, 3, or 4) m Message number Message number 1 is the oldest message, and the number reported by !CNTSMS, is the most recent message. If the message number parameter is omitted, then all messages in the specified index list are deleted.
Chapter 3 – ! Prefix Commands !MUFWDRESET Reset Data in !MUFWDSTATS Syntax: AT!MUFWDRESET Description: Resets all the data reported by !MUFWDSTATS. !MUFWDSTATS Current Traffic Channel Statistics Syntax: AT!MUFWDSTATS Description: Current Multi-User Forward Traffic Channel Statistics. !MUFWDRESET resets the data reported by this command.
Chapter 3 – ! Prefix Commands !PREV? Protocol Revision Syntax: AT!PREV? Description: Queries the modem for the current protocol revision reported by the current base station the modem is communicating with. The response is a decimal digit as noted below. Value Meaning 1 JSTD-008 (PCS) 2 IS-95 3 IS-95A (cellular) 4 Minimum requirements for IS-95B 5 Full requirements for IS-95B 6 CDMA 1X Rev. 0 7 CDMA 1X Rev.
Chapter 3 – ! Prefix Commands !RSSI? Received Signal Strength Indication Syntax: AT!RSSI? Description: Reports the current RSSI (P(AGC)+Ec/Io) in dBm using a (N-1)/N IIR filter for smoother display. When no signal is present it reports -125. Reported values can be interpreted as follows: < -90 = very poor -90 to -86 = poor -85 to -81 = fair -80 to -76 = good > -76 = excellent This command is supported in the online command state and in the command state.
Chapter 3 – ! Prefix Commands !SESSIONSTATUS Current Session Status Syntax: AT!SESSIONSTATUS=, Description: !SESSIONSTATUS (Sets the current Session Status) !SESSIONSTATUS? (Reads the current Session Status) Value Meaning 0 Inactive—there is no session 1 Default—there is a session, but no negotiation has been completed 2 Active—there is a session, and all parameters have had at least one chance to be negotiated In testing and debugging procedures, it is useful to force the session s
Chapter 3 – ! Prefix Commands !SLEEPPARMS Sleep Parameters Syntax: AT!SLEEPPARMS Description: Returns 1xEV-DO Rev. A sleep parameters (slot cycle indexes and sleep periods). Slot cycle timeouts are listed in Julian time format (year month day day-of-week hour:minutes:seconds). Example 1: at!sleepparms Slot Cycle1:3 Slot Cycle2:0 Slot Cycle3:0 Slot Cycle1 Timeout:1980 01 06 6 00:00:00 Slot Cycle2 Timeout:1980 01 06 6 00:00:00 OK Example 2: at!sleepparms HDR Rev.
Chapter 3 – ! Prefix Commands !STATUS Status of the Modem Syntax: AT!STATUS Description: Reports the modem’s status as follows: Current band: Current channel: SID: NID: 1xRoam: HDRRoam: Temp: State: Sys Mode: Pilot [NOT] acquired Modem has [NOT] registered HDR revision: is either OFFLINE, PCS CDMA, Cellular CDMA, PCS Sleep, Cellular Sleep, HDR PCS, or HDR Cellular for the roaming indicator.
Chapter 3 – ! Prefix Commands !SUFWDCRCS Current Single User Forward Channel Statistics on CRCs Syntax: AT!SUFWDCRCS Description: Reports the current Single User Forward Channel Statistics (Single User packet CRCs and Packet Error Rate). !SUFWDRESET resets the data reported by this command.
Chapter 3 – ! Prefix Commands !SUFWDTCSTATS Current Single User Forward Channel Statistics Syntax: AT!SUFWDTCSTATS Description: Current Single User Forward Channel Statistics (Single User packet early slot termination count for all supported DRCs on Forward Traffic Channel). !SUFWDRESET resets the data reported by this command.
Chapter 4 – $ Prefix Commands Chapter 4 – $ Prefix Commands $QCCAV Answer Voice Syntax: AT$QCCAV Description: (Voice builds only). Answers an incoming call as a voice call. Use –SPKMUT (Speaker Mute) to manually turn off mute on the audio path before answering the call. Contrast with A (Answer). See also +CDV (Dial Voice) and +CHV (Hang-up Voice). $QCMIP Mobile IP (MIP) Behavior Syntax: AT$QCMIP Description: Sets the Mobile IP (MIP) behavior. Value Meaning 0 Mobile IP disabled. Simple IP only.
Chapter 4 – $ Prefix Commands $QCMIPGETP Query a User Profile Syntax: AT$QCDMIPGETP Description: $QCDMIPGETP = 1-5 (profile number).The command returns the following parameters for the selected profile: • NAI • Home Addr • Primary HA • Secondary HA • MN-AAA SPI • MN-HA SPI • Rev Tun (Reverse Tunneling) • MN-AAA SS • MN-HA SS If a profile number is not entered, then the AT command returns all the information corresponding to the currently active profile.
Chapter 4 – $ Prefix Commands $QCVAD= Sets or Reads the Mode for Answering Data Calls Syntax: AT$QCVAD= (Set Command) AT$QCVAD? (Read Command) Description: $QCVAD= sets the mode for answering data calls with A (Answer) or auto answer via S0=1. $QCVAD? reads the mode for answering data calls with A (Answer) or auto answer via S0=1. Value Setting 0 OFF (answer as voice). Default.
Chapter 5 – & Prefix Commands Chapter 5 – & Prefix Commands &C Data Carrier Detect Control Syntax: AT&C Description: The modem controls the RLSD output in accordance with the parameter supplied. This command sets the DCD On or Off. Value Setting 0 Sets DCD to remain On at all times. 1 Sets DCD to follow the physical connection. Default 2 DCD follows the state of the TCP/UDP connection.
Chapter 6 – +C Prefix Commands Chapter 6 – +C Prefix Commands +CAD? Analog or Digital Service Syntax: AT+CAD? (Read-only) (local only) Description: Reports the current service mode of the modem in the form +CAD: n.
Chapter 6 – +C Prefix Commands +CFG= Configuration String Syntax: AT+CFG=”” (Sets a configuration) AT+CFG? (Reads a configuration) Description: This command sets a configuration string of up to 248 characters. The string parameter must be enclosed within quotation marks (0x22). You cannot append any other commands after it in the same command line. This string is transmitted to the Base Station as the last step of establishing the transport layer of the airlink. The default setting is null.
Chapter 6 – +C Prefix Commands +CQD= Command State Inactivity Timer Syntax: AT+CQD= (Sets the Command State Inactivity Timer) AT+ CQD? (Reads the Command State Inactivity Timer) Description: This timer determines when (or if) the modem will release a call if there is no activity on the connection between the modem and the IWF, for the specified period. The entry represents a multiple of five seconds. That is, each unit represents 5 seconds.
Chapter 6 – +C Prefix Commands +CSQ? Signal Quality Syntax: AT+CSQ? (Read-only) Description: Reports the received Signal Quality Measure (SQM) and Frame Error Rate (FER). The response is in the form +CSQ: , . If no cellular service is available, the values reported are both 99. If the modem has acquired service but is not in an active call, the SQM value is valid but the FER is still undetectable. SQM Meaning 0-31 00 is lowest quality signal, 31 is the highest.
Chapter 6 – +C Prefix Commands +CTA= Packet Data Inactivity Timer Syntax: AT+CTA= (Sets the Packet Data Inactivity Timer) AT+CTA? (Reads the value) Description: This timer determines when (or if) the modem will use dormant mode on the network. If a timer value is set, the modem releases the radio resource if there is no activity (RLP data frames) on the connection between the modem and the network for the specified period.
Chapter 7 – +F Prefix Command Chapter 7 – +F Prefix Command +FCLASS= Modem Operating State Syntax: AT+FCLASS=[n] Description: Sets the modem's data state. Value Setting 0 Data. Default Note: Fax is not supported.
Chapter 8 – +G Prefix Commands Chapter 8 – +G Prefix Commands +GCAP Get Capabilities Syntax: AT+GCAP Description: Reports the modem’s additional capabilities in one or more lines of text containing AT+ commands. This is used to determine if services the user needs can be performed by the modem. The services and commands reported can be any or all of: Response Description (related commands) +FCLASS Fax support (Fax not supported) +MS Modulation control (+MS, +MR) +MV18S V.
Chapter 8 – +G Prefix Commands SWOC USBD USB VID Software on Card image: “CDPC”, followed by the 5-digit decimal CDPC (CD Product Code), followed by the CD version: • Major revision number (2 digits) • Minor revision number (2 digits) • Point release number (2 digits) USB descriptor table USB Vendor ID Examples with Interpretation of Each Line of the Modem’s Response: AT+GMR p2110100,5077 [Aug 07 2007 14:29:37] Production Release (p). Firmware version 1.01. Point release 00. QCOM: SWI6800V2_FD.00.
Chapter 8 – +G Prefix Commands +GOI Get ISO ID Syntax: AT+GOI Description: Reports the modem’s ISO system registration code (if any). The code provides a method of uniquely defining an object. The cellular modems have no ID string (null). See also +CGOI (Get IWF ISO ID). +GSN Get ESN Syntax: AT+GSN Description: Reports the modem’s electronic serial number. The modem reports an eight character ASCII string of hexdigits (no spaces). See also +CGSN (Get IWF ESN).
Chapter 9 – +I Prefix Commands Chapter 9 – +I Prefix Commands +ICF= Character Framing Syntax: AT+ICF=<[f],[p]> AT+ICF? (Queries the settings) Description: Settings with this command are ignored. Normally, this command sets the local serial port (DTE - DCE) connection character framing. The modem uses a true serial interface, but the modem’s support is limited to: 8-bit data 1 stop bit no parity (the parity setting is ignored) Note: These are the default values.
Chapter 10 – +M Prefix Commands Chapter 10 – +M Prefix Commands +MA= Modulation Auto Mode Syntax: AT+MA= AT+MA? (Queries the settings) Description: Sets the additional modulations that the Base Station may use to connect with the destination modem in Auto Mode operation. This is used for originating and answering operations on data calls and is additional to the modulation setting using the +MS (Modulation Selection) command. The default setting is null. For details on parameters and use, see IS-131.
Chapter 10 – +M Prefix Commands +MV18R= V.18 Reporting Syntax: AT+MV18R= AT+MV18R? (Queries the settings) Description: Enables or disables the extended result codes for +MV18R: from the IWF to the modem. To query the IWF for confirmation that the command is supported, use +GCAP (Get Capabilities). The +MV18S result must be in that response. Value Meaning 0 Disables reporting of V.18 result codes. Default. 1 Enables reporting.
Chapter 11 – +W Prefix Commands Chapter 11 – +W Prefix Commands +WGETWK Request Wake-Up Reason Syntax: AT+ WGETWK Description: Responds with the reason of the last wake-up event. The response is a decimal digit representing the bit-mask below. If no events have triggered, the response is a zero.
Chapter 12 – No Prefix Commands Chapter 12 – No Prefix Commands +++ Escape Syntax: +++ Description: The +++ Escape Sequence is not preceded by AT. Applies only to asynchronous calls. Used to exit data state and enter command state; this is not preceded by AT and does not require . The escape character is fixed as the plus sign “+” (0x2B). The guard time between normal transmission data and the escape sequence is specified as 1 second and cannot be changed.
Chapter 12 – No Prefix Commands D Dial Syntax: ATD Description: Initiates a data call. To dial a voice call, use +CDV. Because of the options available in this command, another AT command cannot follow it on the same line. All characters following the D command are taken as parameter options. Several types of data calls are possible, based on the option(s) entered. Packet Data Calls Traditional CDMA data call dialing uses the parameter “#777”.
Chapter 12 – No Prefix Commands E Echo Syntax: ATE[n] Description: Controls echoing of characters received from the host (DTE) back to the host when in command state. This also affects framing of responses. For details, see “Framing”. Value Setting 0 Disable echo 1 Enable echo. Default. H Hook Control Syntax: ATH[0] Description: Go ON-Hook to disconnect a data/fax call. (To end a voice call, use +CHV) If the modem was already on-hook, no change is made.
Chapter 12 – No Prefix Commands M Mute (Speaker Control) Syntax: ATM[n] Description: This command is provided for compatibility reasons; the modem takes no action. Parameters are ignored. For control of voice mode microphone and speaker muting, see –MICMUT and -SPKMUT. O Online (Remote) Syntax: ATO Description: Currently not supported. Causes the modem to go from command state (online condition) to data state.
Chapter 12 – No Prefix Commands S= S-Register Set/Query Syntax: ATS= (Sets S-Register) ATS? (Queries S-Register) Description: Sets or queries the contents of the specified S-register (n) to the new value (x). Where parameter values are omitted, zeros are assumed. Var. Range n Valid S-register number (for values, see the Table of S-Registers later in this manual. x as determined by the S-register (n). Result Codes: OK S-register n set to x.
Chapter 12 – No Prefix Commands X Result Code Select/Call Progress Control Syntax: ATX Description: Enables tone detection options used in the dialing and handshaking process. As options are chosen, the result codes are also affected. The prime function is to control the modem call response capabilities when the D (Dial) command is issued. Dial Tone Detection When disabled, the modem waits for the period set in register S6 (Wait for Blind Dial) and blind dials.
Chapter 13 – - Prefix Commands Chapter 13 – -Prefix Commands -DTMFB= DTMF Burst Syntax: AT-DTMFB= [,,…] Description: Generates a string of DTMF tones under the timings defined by -TONDUR (Tone Duration). This command can be overridden by -TONMUT (Tone Mute). The values of can be any of 0–9, *, and #, up to a total of 32 keys. Spaces, quotes, brackets, dashes, and commas are not permitted in the string.
Chapter 13 – - Prefix Commands -HDSET= Headset Detection Option Syntax: AT-HDSET= (Sets Headset Detection Option) AT-HDSET? (Queries Headset Detection Option) Description: Sets and queries the detection option for the voice headset. The setting is stored in nonvolatile memory. Parm Meaning 0 Do not use headset detection. Always report “not inserted” via CnS message. 1 Do not use headset detection. Always report “inserted” via CnS message. Default. 2 Use headset detection.
Chapter 13 – - Prefix Commands -NAMVAL= NAM Values Syntax: AT-NAMVAL= [,,,,] (Set command) AT-NAMVAL? (Reads the current account information) Description: This command has three functions related to the account or NAM (Number Assignment Module): Set the Active Account Index The modem supports one account. Using only the parameter (0) sets that account as the active account used by the modem.
Chapter 13 – - Prefix Commands -SPKMUT= Speaker (Headset) Mute Syntax: AT-SPKMUT= (Set command) AT-SPKMUT? (Query command) Description: Sets and queries the state of the speaker mute. This value is not stored in non-volatile memory. The setting is considered temporary, and reverts to the default (OFF) when a new call is started, or the modem is power cycled, reset, or when the profile is restored (&F and Z). Parm Meaning 0 Speaker mute is OFF. Default.
Chapter 13 – - Prefix Commands -TONDUR= Tone Duration Syntax: AT-TONDUR= (Set command) AT-TONDUR? (Query command) Description: Sets and queries the timing, in milliseconds, for generating DTMF tones using single key tones (-DTMFK) and bursts (-DTMFB). Settings are stored in non-volatile memory.
Chapter 14 – Status Registers Chapter 14 – Status Registers Some of these registers relate to the call progress timing at the IWF with the PSTN connection. These are noted below using the (Remote) tag. Table of S-Registers Reg. Description 0 Auto answer The modem auto answers after a delay specified by S0. If S0=0, then auto answer is turned off. The delay is equivalent to [ - 1] x 6 seconds.
Chapter 14 – Status Registers 10 11 Lost Carrier Hang-up Delay (Remote) Specifies the amount of time that the carrier from the remote modem can be lost before the modem goes on-hook. This allows temporary disruptions to carrier without disconnecting. A setting of 255 causes the modem to disable Carrier Detect and presume carrier is always present. DTMF Dialing Speed (Remote) This specifies the duration of tones in DTMF dialing. This register is not used by the -DTMFB command. See -TONDUR (Tone Duration).
Chapter 15 – Result Codes Chapter 15 – Result Codes This table provides a numerical list of the standard result codes possible. Basic Result Codes Code 0 1 2 3 4 Verbose OK CONNECT RING NO CARRIER ERROR 6 NO DIAL TONE 7 BUSY 8 NO ANSWER Meaning Command executed without errors Connected at any of the supported speeds Alerting Signal (Ring) signal received from the network Carrier signal lost or not detected. Unable to activate the service. Command not recognized or could not be executed.
Chapter 15 – Result Codes Extended Cellular Call Progress Result Codes The following extended result codes may be enabled when the +CRC=1 setting is used. Support for these rests with the IWF. These are primarily call progress indications. Note that if Verbose is off (V0), these codes are suppressed; there are no numeric equivalents for call progress codes.
Chapter 16 – Stored Profile Settings Chapter 16 – Stored Profile Settings The CDMA 1X modems do not support a user- defined profile. Both Z (Reset) or &F (Factory Settings Restore) restore the following settings.
Appendix A – Working With the IWF Appendix A – Working With the IWF Introduction Note: The information in Appendix A applies to cellular accounts with Circuit-Switched Data service. Check with your service provider to see which services are enabled for your account. When operating a CDMA modem in IS 95B Circuit-Switched Cellular (CSC) service, the local modem and the IWF modem must work as a team to perform the duties that a traditional wire line modem handles alone.
Appendix A – Working With the IWF Remote-only Some commands require the IWF to provide the response. The local modem treats these as unrecognized commands. If configured (using +CXT), the local modem will open the airlink and pass the command to the IWF, then relay the response to the local host; otherwise the local modem returns ERROR for unrecognized commands. These commands work on the transport layer in the airlink between the two modems. A command such as +CGCAP is in this class.
Appendix A – Working With the IWF Pass through and Reflection In many respects, the local modem operates as a pass through modem providing the local host device with a radio link to the IWF modem. In many cases commands are passed through the local modem for execution at the IWF. The IWF then reflects the command back to the local modem on the transport layer of the airlink. Both modems are kept synchronized with respect to their configuration.
Appendix B – ASCII Table Appendix B – ASCII Table CDMA 1xEV-D0 AT Commands Reference Guide (Document S000482B) 64
Part 2 – Extended AT Commands Appendix B – Acronyms and Definitions Appendix C – Acronyms and Definitions Acronym or Term AGC Cellular dB dBm FER GPS IS-95 MHz PCS PDE response result code RF Sensitivity (RF) Definition Automatic Gain Control 800MHz radio spectrum air interface Decibel = 10 x log10 (P1/P2) (Power dB) Decibel = 20 x log10 (V1/V2) (Voltage dB) Decibels, relative to 1 mW - Decibel(mW) = 10 x log10 (Pwr (mW)/1mW) Frame Error Rate – a measure of receive sensitivity Global Positioning System—a
Index Index ! !APPSUBTYPES Negotiated Subtypes ............... 18 !CNTSMS Count SMS ......................................... 18 !DASMS Delete All SMS ...................................... 18 !DSMS= Delete SMS (Selective) ......................... 19 !ECIO? Ec/Io ........................................................ 19 !GMODE Mode of the Modem ............................. 19 !GSMS? Get SMS ................................................ 19 !MDMVER? Version of the Modem Firmware .....
Index C N CDMA 1X ................................................................. 9 CDMA 1xEV-DO ...................................................... 9 CDMA IS-95B .......................................................... 8 Closing the Airlink .................................................. 63 Command Buffer .................................................... 11 Command Handling ............................................... 12 Command to Data State ........................................
