Simplifying System IntegrationTM Teridian V.22 bis Linux Softmodem for 73M1822/73M1922 MicroDAA User Guide Rev. 1.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043 © 2009 Teridian Semiconductor Corporation. All rights reserved. Teridian Semiconductor Corporation is a registered trademark of Teridian Semiconductor Corporation. Simplifying System Integration is a trademark of Teridian Semiconductor Corporation. Hayes, Hayes AT, Smartcom and Smartmodem are registered trademarks of Hayes Microcomputer Products. IBM, IBM PC, IBM AT and PS/2 are registered trademarks of IBM.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Table of Contents 1 1.1 1.2 1.3 Introduction ............................................................................................................................... 6 Use of this Document................................................................................................................... 6 Language and Terminology ......................................................................................................
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S50 S20 S88 S19 S63 S75 S76 S77 S78 S15 S16 S30 S31 S119 S124 S25 S79 S80 S81 S82 S83 S84 S117 S105 S106 S107 S108 S109 S123 S17 S18 S51 S52 S53 S54 S55 S56 S57 S58 S74 S95 S118 S89 S110 S111 S112 S113 S116 S122 S14 S21 S22 S26 S27 S28 S60 S61 S62 4 UG_1x22_043 Busy Tone / Cadence B Maximum Off Time................................................... 33 Call Progress Selection ..........................................................................
UG_1x22_043 2.3 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S65 DTMF Detect Register .................................................................................... 52 Test Timer ....................................................................................................... 52 S68 Test Error Count.............................................................................................. 53 S69 Auto Retrain Threshold ............................................................
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043 1 Introduction The Teridian V.22BIS Softmodem is a V.22bis, V.22, V.23, V.21, Bell 212A, 103, and 202 modem algorithm. It includes the signal processing functions as well as an “AT” command interpreter. 1.1 Use of this Document It is assumed that the reader has basic familiarity with microprocessors, firmware and data communications. Prior experience with modems is not assumed but would be useful.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide 2 User Guide The modem firmware supports a variation of the Hayes AT command set as its DTE interface. Originating, answering and setting up the various options are performed by sending one or more AT commands to the modem from the DTE. A brief description of the AT command syntax and the AT commands supported follows. 2.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide A/ UG_1x22_043 Repeat Last Command The A/ command causes the modem to re-execute the last command or command sequence that was issued. A/ and +++AT are the only commands that are neither preceded by AT nor followed by . B C Communication Standard Selection B0 ITU V22bis, V22 or V21 operation B1 Bell 212A or Bell 103 operation (also V.
UG_1x22_043 D V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Dial This command puts the modem into originate mode and instructs the modem to dial the phone number expressed by the string argument n...n. The number will be dialed with either tones or pulses depending on how the last number was dialed. On power up, this command will default to pulse dialing. (See the note in DT[n...n] command.) The allowable arguments for n...n differ for pulse and tone dialing; see the descriptions under DT[n...
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UG_1x22_043 K V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide DTE-DCE Flow Control K0 Flow control disabled K3 RTS/CTS flow control (hardware flow control) K4 Xon/Xoff control (software flow control) In Asynchronous mode, CTS is turned inactive as soon as at least 15 bytes are in the 32 byte transmit buffer. CTS is turned back active when less than 4 bytes are in the buffer.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043 The following shows the actions of DCD and DSR as viewed at the RS232 connector (inverted from pins) during the connection process under different conditions. 1) Mode V22bis, Protocol enabled (through S25), Extended result codes. V22bis connection Carrier... result V42 detection Prot./connect.. result Data mode DCD DSR 2) Mode V22bis, Protocol enabled (through S25), Normal result codes. V22bis connection V42 detection connect..
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide O6 Enables rate change to 1200 bps O7 Enables rate change to 2400 bps The O[n] command is used to go back on-line when the command state was entered by issuing the +++ escape sequence or turning DTR from ON to OFF with the appropriated SRegister setting in effect. The O[n] command applies only to asynchronous operation. Note: If commands O0 or O1 are given to the modem while not connected, it will respond with ERROR.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S UG_1x22_043 S Register Monitoring S[r]? S[r]$ S[r]??? S[r]$$$ S[r]=[n] S[r]=n.$n.n.$n… The S[r]? command requests the modem to report the current value of register [r]. These registers are used to set up various operating parameters of the modem as explained in Chapter 5. The value reported is in decimal notation. The S[r]$ command requests the modem to report the current value of register [r]. The value reported is in hexadecimal notation.
V.22BIS Linux Softmodem for 73M1x22 MicroDAA User Guide V UG_1x22_043 Verbose/Numeric Result Codes Selection V0 Numeric result codes – Format digit(s) V1 Verbose result codes – Format word V2 Numeric result codes - Format digit(s) Refer also to the Q[n] and X[n] commands Y Asynchronous/Synchronous Mode Selection Y0 Asynchronous mode. No speed buffering, no protocol. Y1 Synchronous mode. No speed buffering, no protocol. Y4 Quasi-Synchronous mode.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide W Extended Result Codes Selection W0 W1 W2 UG_1x22_043 Do not return extended result codes (40-80). The message CONNECT followed by the data rate between the DTE and the modem will be sent to the DTE The CONNECT message will report the DTE speed then enable the carrier and extended result codes The CONNECT message will report the DCE speed.
UG_1x22_043 X V.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Y Asynchronous/Synchronous Mode Selection Y0 Asynchronous mode. No speed buffering, no protocol. Y1 Synchronous mode. No speed buffering, no protocol. Y4 Quasi-Synchronous mode. Allows the transmission and reception of synchronous data through an asynchronous DTE by stripping off start and stop bits on transmission and adding them on reception (See V42 operation). Asynchronous with speed buffering.
UG_1x22_043 @L[n] V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Set Lease Line Operation Lease line operation is designated by S89 bit 2 @Z n=1 Sets lease line bit n=0 Clears lease line bit Escape to OS Terminates the softmodem application gracefully and goes to Linux prompt. To return to Softmodem application from the linux prompt, type “tsc_1922_CRLF” from the root directory.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide 2.2 S-Registers 2.2.1 S-Register Overview UG_1x22_043 The S register set found in the TSC Softmodem is modeled after the Hayes S-registers, but differ in many respects. The Hayes register set has evolved over time to support added features, and the TSC Softmodem has many features not found in other modems.
UG_1x22_043 2.2.1.1 S0 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide TR30.2-Style Control and Status Registers Auto Answer n 0 –255 0 Auto answer disabled 1-255 Auto answer mode on selected number of rings This register specifies the ring on which the modem will answer. A value of 1 to 255 will place the modem in auto-answer mode and cause it to answer on that many rings detected.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S4 UG_1x22_043 Line Feed Character n 0 –127 (ASCII) 10 0 Suppress after the in a result code Applicable only when verbose mode (V1) is selected. S5 S6 Backspace Character n 0 –32 and 127 (ASCII) 8 Wait Before Blind Dial n 1 – 255 seconds 2 2 seconds Country selection dependent (S99) When X0, X1 or X5 mode is selected, the modem will dial after the time set in S6 has elapsed since going off hook.
UG_1x22_043 S8 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Pause Time For Comma n 1 – 254 seconds 2 2 seconds The S8 register sets the number of seconds the modem will pause during a pause created by a "," (comma) in the dialing sequence. The effective time will range from (n-1) to n seconds. S9 Carrier Detect Response Time n 1 – 254 in 100 ms unit 6 600 ms The S9 register sets how long a carrier signal must exist before the modem issues a carrier detect response.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043 Country support S99 Preset Country Selection 0 CTR21 1 USA / Canada 33 France 34 Spain 39 Italy 44 United Kingdom 49 Germany 61 Australia 81 Japan 86 China 886 Taiwan 82 S. Korea S99 provides an easy way to set up the TSC Softmodem for different countries with a single command.
UG_1x22_043 S12 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide DTMF / Twist Dial Register 32 D digit selected, 2dB twist. Selects the digit to be dialed as well as the desired twist between the low and the high frequency. For normal operation, only the twist needs to be set once. The digit will be filled automatically. For test operation, both the twist and the digit must be filled. See J command. Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Rev. 1.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S13 UG_1x22_043 DTMF-Data / Transmit Attenuation 16 0dB nominal for call progress and data, +2dB nominal for DTMF Attenuation level can go from +4.0 dB to –11.0 dB from nominal. DTMF gain increments have to be a minimum of 1dB, while for CP/Data the minimum is 2dB gain increments. DTMF DTMF CP/Data S85 CP / Data Level Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Gain/Atten 0 0 1 0 X 0 1 0 +4.
UG_1x22_043 S32 S33 S34 S72 V.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S92 UG_1x22_043 Status Register 4 4 Bit pulse dialing allowed. Value Bit 0 Reserved Bit 1 Reserved Bit 2 0 Pulse dialing disabled 1 Pulse dialing enabled All others bits are reserved.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Bit 5 2250Hz – S0 (default) Bit 6 Reserved Bit 7 Reserved S121 Answer Tone Qualify Time The value of this register extends the answer tone qualification time beyond the 155ms minimum in 10ms units. n 0-255, but do not over-extend to maintain stability. Call progress functions S29 Extended Result Code/ Cadence Status 136 Country selection dependent (S99) See following. A bit set to 1 selects the function.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S73 S66 UG_1x22_043 Configuration and Status Register 1 32 Sets different configuration. A bit set to 1 selects the function. Bit 0 Enable teletel SEP codes in V.23 PAVI mode Bit 1 Low power standby idle mode enabled Bit 2 Reserved Bit 3 Reserved Bit 4 Bit 6 Reserved CLI 125 mS AT command delay enabled (disable this option for faster response time to AT commands).
UG_1x22_043 S37 S38 S39 S40 S41 S42 Rev. 1.5 V.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S23 UG_1x22_043 Busy Detection Cadence Cycle Count 3 3 busy cadence cycles selected. Defines how many busy cadence cycles before sending the busy result code.
UG_1x22_043 S48 V.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S19 0 280Hz – 680Hz 1 370Hz – 500Hz 2 240Hz – 580Hz 3 200Hz – 650Hz 15 User defined filter Precise Call Progress Selection 195 UG_1x22_043 Country selection dependent (S99) 350Hz and 440Hz are dial tones; 440Hz and 620Hz are Busy tones. Defines which precise tones constitute a dial tone and which constitute a busy tone (related bit must be set to one). High nibble defines dial tone and low nibble defines busy. See also S63.
UG_1x22_043 S75 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Country selection dependent (S99) Pre Dial Call Progress Imprecise Detect Level n 1 - 96 30 -45dBm threshold. S75 determines at what minimum level imprecise call progress tones are detected before dialing. A larger value corresponds to a lower signal level. The dBm level depends on the DAA used.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S78 Post Dial Call Progress Precise Detect Level n 1 - 96 30 -45dBm threshold. UG_1x22_043 Country selection dependent (S99) S78 determines at what minimum level precise call progress tones are detected after dialing. Refer to table under S75. S15 Calling Tone Off Time n 0 – 255 in 100 ms unit 17 1.7 second Calling tone is defined as a 1300Hz tone.
UG_1x22_043 S31 S119 V.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S25 UG_1x22_043 Protocol Selection 0 No protocol detection selected. Modem looks for ODP/ADP on connection. This is used when the host does not do the initial protocol detection. Bit 0 1 Bit 1 1 Disconnect if no protocol is detected V42-LAPM protocol selected. This option enables the ODP/ADP sequence detection support within the TSC Softmodem if not supported by the host processor.
UG_1x22_043 S82 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide PSK Answer Carrier Detect Level n 1 – 96 35 -45dBm threshold. S82 determines at what minimum level carrier is detected for answering PSK. A larger number corresponds to a lower signal level threshold. S83 QAM Originate Carrier Detect Level n 1 – 96 40 -45dBm threshold. S83 determines at what minimum level carrier is detected for originating QAM. A larger number corresponds to a lower signal level threshold.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043 Black Listing function S105 Pre Call attempt delay n 1 – 254 in seconds 5 5 seconds Delay prior attempting a call (after an ATD… command is issued) S106 Delay between 1st and 2nd attempt n 1 – 254 in seconds 5 5 seconds Delay between 1st and 2nd call attempt to the same number in a series.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S109 Delay between series N 0 – 254 in minutes 0 Disabled – only 1 series allowed Sets the delay before another series of call attempts is allowed. Answering functions S123 Software Ring Detect This register controls the ring amplitude threshold and selects hardware or software ring detection. (Default = 0) Ring Amplitude Detection Threshold. Lower value detects lower amplitude ring Bits 0-6 signal.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S18 Ring / Maximum Frequency Detection n 1 – 254 in Hz 75 75 Hz UG_1x22_043 Country selection dependent (S99) Assumes a half wave detection circuit. Note: The values need to be doubled if a full wave detector is used. S51 S52 S53 S54 Ring / Cadence A Minimum On Time n 0 – 255 in 40 ms unit 40 1.6 s Ring / Cadence A Maximum On Time n 0 – 255 in 40 ms unit 60 2.
UG_1x22_043 S56 S57 S58 S74 V.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Bit 7 Enables using USR11 output to enable an external signal path for CID. Bit 7 = 0 sets continuous CID mode where S95 bits 0, 1, 2, and 3 are ignored. Also enables using USR 11 output to signal DAA to enter idle line signaling state for LIU-E detection. Special modes: S95 = 0X01 0000B S95 = 0X110000B S95 = 10011001B S118 UG_1x22_043 Continuous FSK Caller ID mode. Continuous DTMF - send detected digits to DTE without “CID:” message.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Bit 1 1 Enables On-Hook Line-In-Use Voltage sensing detection (LIU-V) Bit 2 1 Bit 3 1 Bit 4 1 Enables On-Hook Line-In-Use Energy sensing detection (LIU-E) Enables Call-Waiting Caller-ID option. This bit applies only to OffHook/Online/Type II Caller-ID.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S116 UG_1x22_043 Parallel-Pick-Up Energy detection Threshold n 72, 80, 90. 72 1 db energy loss threshold Value Energy loss detected 72 1 dB loss of energy detection 80 2 dB loss of energy detection 90 3 dB loss of energy detection This register sets the Threshold for PPU to detect loss of Energy compared to the energy level at the time of connection.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Bit 4 Bit 5 Bit 6 Bit 7 S21 Verbose result codes 0 No match 1 First cadence of double cadence matched 0 Touch tone dialing 1 Pulse dialing 0 Not connected 1 Connected 0 Answer 1 Originate General Modem Status Register 2 1 See following. Bit Value Bit 0 0 Keypress abort disable. 1 Keypress abort enable. 0 Use debounced carrier detect 1 Use raw carrier detect (set by C2 command).
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S22 S26 General Modem Status Register 3 54 See following Bit 2 Bit 1 Bit 0 0 0 0 Y0 Asynchronous mode 0 0 1 Y1 Synchronous mode 1 0 0 Y4 Pseudo-synchronous mode 1 1 0 Y6 Asynchronous with speed buffering Bit 6 Bit 5 Bit 4 Bit 3 0 0 0 1 X0 Enable Result Codes 0-4. 0 0 0 0 X1 Enable Result Codes 0-5, 10. 0 0 1 0 X2 Enable Result Codes 0-6, 10. 0 1 0 0 X3 Enable Result Codes 0-5, 7, 10.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Bit 4 0 Select 1800 Hz guard tone to be generated during answer mode handshake Select 550 Hz guard tone to be generated during answer mode handshake Disables guard tone generation 1 Enables guard tone generation 0 Disable V.23 turnaround 1 Enable V.23 turnaround 0 Tx 1200 bps (Bell 202 and V.23 slave mode) 1 Rx 1200 bps (Bell 202 and V.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S28 Fast Connect Status and Calling Tone Enable Register 50 See following.
UG_1x22_043 S61 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Signal detect Register 1 0 Bit 0 Reserved Bit 1 Remote digital loopback detect bit. This bit will be set when a remote digital loopback request has been detected. Bit 2 Carrier detect bit. This bit will be set when conditions for V.24 circuit 104 (DCD) have been met by the modulation mode being used. Wait for Calling Tone before sending Answer Tone Bit 3 Bit 4 Energy detect bit.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S65 S68 UG_1x22_043 DTMF Detect Register 0 See following Bit 7 indicates a valid DTMF detection. A register value of zero indicates no detect for the polled application. Bits 6 - 4 are reserved. Bits 3 - 0 indicate the tone pair detected. Works with command J6 and bit 7 have to be set in order to be valid.
UG_1x22_043 S69 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Test Error Count 0 No error Keeps count of how many errors occur during the self-test. S70 Auto Retrain Threshold Forces auto retrain if threshold is below the mean square error. Default = 16 S90 RTS to CTS Turnaround Delay n 0 – 255 in 10ms unit 2 20 ms turnaround delay When the N0 command has been issued, register S90 defines the time interval between an OFF to ON transition of RTS and when the modem turns CTS ON.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide 2.3 54 UG_1x22_043 Application Notes for the TSC Softmodem Rev. 1.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Resetting the TSC Softmodem A reset of the TSC Softmodem can be performed three different ways: • A power-on reset • Reset Button (similar to power on reset) • Start the soft modem from Linux prompt Call Progress Detection The TSC Softmodem has expanded call progress detection capabilities.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043 Continuous cadence: The tone is continuously present and provided that it meets the requirements for frequency and level, it will be considered as a valid call progress tone after a certain time of validation (see S67 or S23). This is the standard cadence for dial tone detection in most cases.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Double cadence: The cadence has a regular On and Off time, A, followed by a On and Off time, B, and provided that it meets the requirements in terms of frequency and level, it will be considered as a valid call progress tone after a certain time of validation (see S67 or S23). An example of this is the cadence for the Italian dial tone.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043 Built in Country Support Since the TSC Softmodem is intended to address all the certification requirements worldwide, it has been provided with completely flexible features and parameters that can be modified to adapt to virtually any telephone network in the world and any certification requirements.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide USA Canada CTR21 France UK Italy Germany Japan Australia Spain Affected register Country implemented (all timing is in seconds and levels in dBm; see S99 register descriptions) China and Taiwan are identical to USA, except for China transmit level.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043 max_on_B_dt 0.000 0.720 0.000 0.000 0.720 0.000 0.000 0.000 0.400 S40 min_off_B_dt 0.000 0.800 0.000 0.000 0.800 0.000 0.000 0.000 0.000 S41 max_off_B_dt 0.000 1.200 0.000 0.000 1.200 0.000 0.000 0.000 0.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide V23 Operation In addition to the standard V23 recommendation, the TSC Softmodem also adds a special feature referred to as V23 PAVI operation. This feature implements the mechanism to allow the swapping or turn-around of the transmission channels during communications. Transmission speed may then be monitored dynamically during a connection; the transmitter at 75 bps may become the transmitter at 1200 bps, and vice versa.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043 DTMF Tone Detection The TERIDIAN TSC Softmodem provides two different methods for detecting DTMF tones being exchanged on the phone line. 1st method: This method is implemented though a specific detection mode enabled by the J6 command. Once the device has entered this mode, the host processor is required to poll continuously the S65 register in order to detect a valid DTMF tone.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide SMS Applications The TSC Softmodem has been optimized for SMS and V.23 half duplex in general. There are several enhancements that have been added to the TSC Softmodem to make it more compatible with SMS, including faster turn around and demodulator settling. Normally the modem will be used in the “clear channel” mode (Y0), but this is not mandatory.
V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043 SMS Applications continued 18. Turn on RTS (to switch TSC Softmodem modem to transmit mode) 19. Wait for CTS on 20. Transmit DLL_SMS_ENQ message if the ACK1 was a null message or next DLL_SMS_INFO_MO to send another data frame 21. Turn off RTS (to switch modem to receive mode) 22. Wait for DCD on 23. Detect DLL_SMS_ACK1 again from SM-SC if the ACK1 was a null last time or DLL_SMS_ACK0 for the SMS_INFO_MO frame just received. 24.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide SMS Applications continued 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25.
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V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide UG_1x22_043 4 Related Documentation The following 73M1x22 documents are available from Teridian Semiconductor Corporation: 73M1822 Demo Board User’s Manual 73M1922 Layout Guidelines 73M1x22 Worldwide Design Guide Teridian V.
UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide Revision History Date 10/10/2006 3/11/2009 4/7/2009 Rev. 1.5 Revision 1.0 1.4 1.5 Description First Publication. Miscellaneous edits, new features. Miscellaneous edits.
