Maxim Integrated 73M1822, 73M1922 User Manual

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Teridian V.22 bis

Linux Softmodem for

User Guide

Rev. 1.5

April 7, 2009

UG_1x22_043

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. MNP is a registered trademark of Microcom. Tri-state is a registered trademark of National Sem iconductor Corporation. All other trademarks are the property of their respective owners.

Teridian Semiconductor Corporation makes no warranty for the use of its products, other than ex pressly contained in the Company’s warranty det ai l ed i n the Teridian Semiconductor Corporation standard Terms and Conditions. The company assumes no resp onsibility for any errors which may appear in thi s document, reserves the right to change device s or specifications detailed herein at any ti m e without notice and does not make any commitment to update the information contained herein. Accordingly, the reader is cautioned to verify that this document is current by comparing it to the latest version on http://www.teridian.com or by checking with your sales representative.

Teridian Semiconductor Corp., 6440 Oak Cany on, Suite 100, Irvine, CA 92618

TEL (714) 508-8800, FAX (714) 508-8877, http://www.teridian.com

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Table of Contents

Introduction ............................................................................................................................... 6

1.1

Use of this Document ................................................................................................................... 6

Language and Terminology ......................................................................................................... 6

1.2

Registered Trademarks ............................................................................................................... 6

1.3

User Guide ................................................................................................................................. 7

2.1

The AT Command Format ........................................................................................................... 7

S-Registers ................................................................................................................................ 20

2.2

S-Register Overview ...................................................................................................... 20

2.2.1

Auto Answer .................................................................................................... 21

Ring Count ...................................................................................................... 21

Escape Code Character .................................................................................. 21

Carriage Return Character .............................................................................. 21

Line Feed Character ....................................................................................... 22

Backspace Character ...................................................................................... 22

Wait Before Blind Dial ..................................................................................... 22

Wait For Carrier After Dial ............................................................................... 22

Pause Time For Comma ................................................................................. 23

Carrier Detect Response Time ....................................................................... 23

Lost Carrier Hang Up Delay ............................................................................ 23

S10

S99 Preset Country Selection ................................................................................ 24

DTMF Ton/Toff Dialing Speed ........................................................................ 24

S11

DTMF / Twist Dial Register ............................................................................. 25

S12

DTMF-Data / Transmit Attenuation ................................................................. 26

S13

DTMF- DAC transmit level coefficient ............................................................. 26

S85

Pulse Dial Make Time ..................................................................................... 27

S32

Pulse Dial Break Time ..................................................................................... 27

S33

Pulse Dial Inter-digit Time ............................................................................... 27

S34

Pulse Map \ CID control \ Black Listing control ............................................... 27

S72

Status Register 4 ............................................................................................. 28

S92

Flash (!) / On Time .......................................................................................... 28

S86

Flash (!) / Off Time .......................................................................................... 28

S87

Accepted Answer Tone Frequencies .............................................................. 28

S120

Answer Tone Qualify Time .............................................................................. 29

S121

S29 Extended Result Code/ Cadence Stat us ................................................. 29

Configuration and Status Register 1 ............................................................... 30

S73

Dial Tone / Wait For Dial Tone Time ............................................................... 30

S66

Dial Tone / Qualify Dial Tone Time ................................................................. 30

S67

Dial Tone / Cadence A Minimum On Time ..................................................... 30

S35

Dial Tone / Cadence A Maximum On Time .................................................... 30

S36

S37 Dial Tone / Cadence A Minimum Off Time ..................................................... 31

Dial Tone / Cadence A Maximum Off Time .................................................... 31

S38

Dial Tone / Cadence B Minimum On Time ..................................................... 31

S39

Dial Tone / Cadence B Maximum On Time .................................................... 31

S40

Dial Tone / Cadence B Minimum Off Time ..................................................... 31

S41

Dial Tone / Cadence B Maximum Off Time .................................................... 31

S42

Busy Detection Cadence Cycle Count ............................................................ 32

S23

Busy Tone / Cadence A Minimum On Time .................................................... 32

S43

Busy Tone / Cadence A Maximum On Time ................................................... 32

S44

Busy Tone / Cadence A Minimum Off Time .................................................... 32

S45

Busy Tone / Cadence A Maximum Off Time ................................................... 32

S46

Busy Tone / Cadence B Minimum On Time .................................................... 32

S47

Busy Tone / Cadence B Maximum On Time ................................................... 33

S48

Busy Tone / Cadence B Minimum Off Time .................................................... 33

S49

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S50 Busy Tone / Cadence B Maximum Off Time ................................................... 33

Call Progress Selection ................................................................................... 33

S20

Imprecise Filter Selection ................................................................................ 33

S88

Precise Call Progress Selection ...................................................................... 34

S19

Precise Call Progress Detect .......................................................................... 34

S63

Pre Dial Call Progress Imprecise Detect Level ............................................... 35

S75

Post Dial Call Progress Imprecise Detect Level ............................................. 35

S76

Pre Dial Call Progress Precise Detect Level ................................................... 35

S77

Post Dial Call Progress Precise Detect Lev el ................................................. 36

S78

Calling Tone Off Time ..................................................................................... 36

S15

Calling Tone On Time ..................................................................................... 36

S16

Data Modulation Selection .............................................................................. 36

S30

Data Modulation Status ................................................................................... 37

S31

Wait Before Connect ....................................................................................... 37

S119

V23 Half Duplex Enable .................................................................................. 37

S124

Protocol Selection ........................................................................................... 38

S25

FSK Originate Carrier Detect Level ................................................................ 38

S79

FSK Answer Carrier Detect Level ................................................................... 38

S80

PSK Originate Carrier Detect Level ................................................................ 38

S81

PSK Answer Carrier Detect Level ................................................................... 39

S82

QAM Originate Carrier Detect Level ............................................................... 39

S83

QAM Answer Carrier Detect Level .................................................................. 39

S84

Inactivity Timeout ............................................................................................ 39

S117

Pre Call attempt delay ..................................................................................... 40

S105

Delay between 1

S106

Delay between N

S107

Maximum successive failed attempts ............................................................. 40

S108

Delay between series ...................................................................................... 41

S109

Software Ring Detect ...................................................................................... 41

S123

Ring / Minimum Frequency Detection ............................................................. 41

S17

Ring / Maximum Frequency Detection ............................................................ 42

S18

Ring / Cadence A Minimum On Time ............................................................. 42

S51

Ring / Cadence A Maximum On Time ............................................................ 42

S52

Ring / Cadence A Minimum Off Time ............................................................. 42

S53

Ring / Cadence A Maximum Off Time ............................................................ 42

S54

Ring / Cadence B Minimum On Time ............................................................. 42

S55

Ring / Cadence B Maximum On Time ............................................................ 43

S56

Ring / Cadence B Minimum Off Time ............................................................. 43

S57

Ring / Cadence B Maximum Off Time ............................................................ 43

S58

Billing Delay Time ........................................................................................... 43

S74

S95 Caller ID configuration ..................................................................................... 43

Caller ID Ring Interrupt Delay ......................................................................... 44

S118

Parallel Pick-up Energy Detection (Default=0) ............................................... 44

S89

Line-In-Use/Parallel Pick Up Configuration Regi st er ...................................... 44

S110

Line-In-Use Settling time ................................................................................. 45

S111

Line-In-Use Energy detection Wait ................................................................. 45

S112

Line-In-Use Energy Detection Threshold ........................................................ 45

S113

Parallel-Pick-Up Energy detection Threshold ................................................. 46

S116

Parallel Pick Up Debounce Timer ................................................................... 46

S122

General Modem Status Register 1 .................................................................. 46

S14

General Modem Status Register 2 .................................................................. 47

S21

General Modem Status Register 3 .................................................................. 48

S22

Data Mode Control Register ........................................................................... 48

S26

Call Progress Transmit Register ..................................................................... 49

S27

Fast Connect Status and Calling Tone Enable Register ................................ 50

S28

Test Control Register ...................................................................................... 50

S60

Signal detect Register 1 .................................................................................. 51

S61

Signal detect Register 2 .................................................................................. 51

S62

and 2

and N+1

attempt .................................................................. 40

attempt ............................................................ 40

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S65 DTMF Detect Register .................................................................................... 52

Test Timer ....................................................................................................... 52

S68

Test Error Count .............................................................................................. 53

S69

Auto Retrain Threshold ................................................................................... 53

S70

RTS to CTS Turnaround Delay ....................................................................... 53

S90

Maximum carrier detect threshold (High Byte) ................................................ 53

S114

Maximum carrier detect threshold (Low Byte) ................................................ 53

S115

Application Notes for the TSC Softmodem ................................................................................ 54

2.3 Resetting the TSC Softmodem Call Progress Detection Built in Country Support V23 Operation Line in Use/Parallel Pick Up Detection Support DTMF Tone Detection SMS Applications SMS Applications continued SMS Applications continued

S-Register Index ...................................................................................................................... 66

Related Documentation .......................................................................................................... 68

Contact Information ................................................................................................................ 68

5 Revision History

...................................................................................... 55

................................................................................................. 55

................................................................................................. 58

................................................................................................................ 61

............................................................ 61

................................................................................................... 62

........................................................................................................... 63

.......................................................................................... 64

.......................................................................................... 65

................................................................................................................................ 69

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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 w el l 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. This document presents all the features included i n the TSC V.22BIS Softmodem in terms of software.

1.2 Language and Terminology

To a large extent, telecommunications and, by extension, data communications, has developed a terminology distinct from the rest of the e l ect ronics engineering community. The lack of worldwide standards until recent years has also hampered the adoption of widely accepted terms. North A m erica, dominated by the earlier influence of Bell Telephone, has developed terminology, which differs from that now used by the ITU, the industry group respon sibl e for setting international standards. As international data exchange grows in importance, the ITU can be expected to grow in influence, even in North America. For that reason we have chosen to use t he ITU terminology in most cases. There will be some exceptions to our use of ITU terms. For exampl e, "mark" (one) and "space" (zero) are much shorter t han "binary one" and "binary zero" and these have been used where appropriate. Also, we may use Bell terminology when discussing Bell specif i cat ions. The North American terminology is so pervas ive that it is used by default in areas where the ITU has yet to venture.

1.3 Registered Trademarks

Throughout this manual, we wish to acknowledge the following: Hayes, Hayes AT, Smartcom and Smartmodem are registered trademarks of Hay es M icrocomputer Products; IBM, IBM PC, IBM AT, and PS/2 are registered trademarks of IBM; MNP i s a registered trademark of Microcom; Tri-state is a registered trademark of National Semiconductor Corporation.

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Causes the modem to immediately go on-line (off-hook) in the Answer mode and attempt to handshake regardless of the value of register S0. This command gives you a method of manually answering an incoming phone call. For restrictions, see also the R command.

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 m ore AT commands to the modem from the DTE. A brief desc ription of the AT command syntax and the AT commands supported follows.

2.1 The AT Command Format

Instructions sent to the modem are referred as “AT commands” because they are always prece ded by a prefix composed of the two characters “AT” t hat are used to get the “ATtention” of the modem. Provided that the correct connections have been made (refer to the data sheet), the TSC Softmodem will use those two characters to determine the transmission rate, the data length as well as the parity used by the DTE. Most of the AT commands have selectable parameters and related values. Every AT comm and will have the following format:

<AT><Command>{Argument}{=n}<Enter>

AT - Attention code Command - A command consists of one letter Argument - Optional information that further defines the command =n - Used when setting a register

You may "string" commands together in one command line as long as the total length of the command line does not exceed 63 bytes. The attention code, AT, is only required at the beginning of the command line. If no argument is provided with a command that takes a numerical argument, an argumen t of zero is assumed. For example, the following commands are identical:

ATH<Enter> or ATH0 <Enter>

NOTE: Information in "angle" brackets <> must be included as part of the command line, while information in "curly" braces {} may or may not be necessary as part of the command line.

NOTE: the +++ and A/ commands are neither preceded by AT nor followed by <CR>. The TSC Softmodem requires time before it is ready to accept another command after responding

with “OK”. When multiple AT commands are used back to back, the user must wait until after the ‘OK<Enter>_’ response from the modem from the previous command before the modem is ready to take another command. This wait time should be a least 10 ms. All commands except “D ”, “A”, and “O” return an “OK”.

The following description uses these convent i ons:

• All allowed parameters are shown.

•  specifies the default value when applicable.

A Answer

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execute the last command or command

A/ and +++AT are the only commands that are neither preceded by AT nor followed by

V23 Master or Slave

mode

V23 Slave or Master

mode

Turnaround phase

DCD

Active

Inactive

A/ Repeat Last Command

The A/ command causes the modem to resequence that was issued.

<Enter>.

B Communication Standard Selection

B0 ITU V22bis, V22 or V21 operation



B1 Bell 212A or Bell 103 operation (also V.22bis f or 2400 bps operation) B2 V23 – 75bps transmission, 1200bps reception – Master mode B3 V23 – 1200bps transmission, 75bps recept ion – Slave mode B4 Bell 202 – 1200bps reception B5 Bell 202 – 1200bps transmission B6 V23 4-Wire – 1200bps receive and transmit B7 V23 4-Wire – 1200bps receive and transmit (same as B6) B8 Bell 202 4-Wire – 1200bps receive and transmit B9 Bell 202 4-Wire – 1200bps receive and transmit (same as B8)

B10 Selects 1200 bps V.23 Half duplex mode ( V23 H). B10 and B11 are the same B11 Selects 1200 bps V.23 Half duplex mode ( V23H) . B10 and B11 ar e the same.

C Data Carrier Detect Signal (DCD) Monitoring

 C1 DCD ON in presence of qualified carrier signal C2 DCD ON in presence of raw carrier signal

During V23 turnaround phases, the DCD signal is OFF if C1 or C2 options selected

C0 DCD always ON

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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

e 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...n]

Modem uses answer mode frequencies after dialing the number. Allows dialing up an originate-only modem. Busy detect is disabl ed during reverse dial.

;

A “;” (semicolon) causes the modem to go back into the Command State,

line. To do this, the semicolon

must be the last character in the command line.

When inserted in a dialing string, a “,” (comma) causes the modem to pause. The default time for the pause is two seconds, and can be changed by

A @ (commercial "at" symbol) causes the modem to wait up to 30 seconds for

tect the end of a prerecorded message. The default wait time is 30 seconds, and can be changed by modifying register S7. Result Codes 7 and 8 will be reported regardless of which Result Code Set is selected.

An ! (exclamation mark) causes a "hook flash." This simulates hanging up for 1/2 second and then reconnecting. It i s typi call y used for transferring calls.

Causes the modem to wait for a dial tone for a specified length of time before

by modifying register S66. Result Code 6 will always be included regardless which Result Code Set is selected.

Replace the current active configuration with the factory standard configuration stored in memory

D Dial

n n A-D, *, # are only allowed during Tone dialing.

command will default to puls and DP[n...n].

0-9 digit

Dial String Modifiers

Pulse dial the digits that follow.

Tone dial the digits that follow.

allowing you to enter other commands while on-

modifying register S8. a 5 second period of quiet before proceeding. This is often used to de

proceeding. The default is 8 seconds, and can be changed

S-register modification. See S[r]=[n] comm and. PTT Test. See J[n] command.

E Echo Command

E0 Command echo disabled



E1 Command echo enabled

F Load Factory default Configuration

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Analog Interface Test Mode: Loops back the TXAP-TXAN signal to RXA through external components to check if everything is wired correctly. Returns

Goes off-hook and wait for CAS tone. If a CAS is detected, send an ack and

detect a US CID .

ernate (preferred) method of detecting DTMF tones is available though usage of the Caller ID DTMF detection mode. Refer to DTMF tones detection chapter at the end of this document.

G Guard Tone Selection

 G1 550Hz guard tone enabled G2 1800Hz guard tone enabled

No guard tone

H Hook Control



H1 Off-hook (connect to phone l i ne)

On-hook (hang up)

I Identification

I0 I3 Returns firmware revision number I4 Returns copyright notice

Returns TSC Softmodem information

Returns product identification code

J PTT t est

J0 J1 Transmit DTMF tones specified by registers S12 and S13 J2 Transmit Answer ton e or Calling tone specified by register S13 and S27 J3 Transmit modulati on specified by registers S14, S30 and S60 J4 Transmit silence (quiet m ode) J5 Wait (To set up the wait time use J5.[n]. [n] is in 1/10 ms) J6 Detect CAS and DTMF tones off hook(requires host polling of register S65)*

*An alt

Stop J test in progress

OK, or ERROR. Signal Levels are specified wit h S113, S114-S115.

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is turned inactive as soon as at least 15 bytes are in the 32

status is only acknowledged by the TSC Softmodem, thus starting or stopping data

transmission to the DTE, if data are received by the DCE. Receive Data is not buffered by

DSR

circuit is turned ON

up process

circuit is turned ON

K DTE-DCE Flow Control



K3 RTS/CTS flow control (hardware flow control) K4 Xon/Xoff control (software flow control)

In Asynchronous mode, CTS byte transmit buffer. CTS is turned back active when less than 4 bytes are in the buffer. RTS

the TSC Softmodem.

Flow control disabled

L Fast Connect



L1 Disable 2100 Hz answer tone and billing delay L2 2 second billing delay enabled with no 2100 Hz answer tone L3 400 ms answer tone and billing delay enabled

Disable Fast Connect

N Data Set Ready (



DSR always ON DSR is OFF in the idle state and when in a test mode. DSR

at start of the handshaking process. DSR is turned OFF when hangis started.

DSR is OFF in the idle state and when in a test mode. DSR at the end of handshake after issuing the “CONNECT” result code. DSR turned OFF when hang-up process is started.

) signal Monitoring

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V22bis

connection

Carrier...

result

V42

detection

Prot./connect

result

Data

mode

DCD

DSR

V22bis

connection

V42

detection

connect.. result

Data

mode

DCD

DSR

V22bis

connection

V42

detection

Data

mode

DCD

DSR

V22bis

connection

Carrier...

result

Prot./connect..

result

Data

mode

DCD

DSR

V22bis

connection

Data

mode

DCD

DSR

If you have returned to Command state from Data state without breaking a connection, the O0 command will return you on-line (Data stat e)

Similar to O0, but also causes the modem to initiate an equalizer retrain sequence

The following shows the actions of DCD and DSR as viewed at the RS232 connect or (inverted from pins) during the connection process under different conditions.

1) Mode V22bis, Protocol enable d (through S25), Extended result co des.

2) Mode V22bis, Protocol enable d (through S25), Normal result codes.

3) Mode V22bis, Protocol enable d (through S25), No result codes.

4) Mode V22bis, No Protocol, Extended result codes.

5) Mode V22bis, No Protocol, No result codes.

O On-Line



O1 O2 Enables the modem to respond to a remote request for retrain

O3 Disables the modem to respond to a remote request for retrain O4 Enables speed negotiation O5 Disables speed negotiation

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The O[n] command is used to go back on-line when the command state was entered by

Note: If commands O0 or O1 are given to the modem while not connected, it will respond with ERROR.

Causes the modem to pulse dial.

conjunction with the dial command, or alone, to designate

the method used for subsequent dialing.

DTR

Modem goes on-hook (hangs up), disables the Auto Answer mode, and

transitions from ON to OFF.

Turning

back ON will enable auto-Answer mode.

Enable V.23 Turnaround in Master Mode (On to Off

transition starts the

turnaround). Turnaround is done via

in all other R command settings.

The R[n] command selects how the Data Terminal Ready (

) signal is used by the

modem.

O6 Enables rate change to 1200 bps O7 Enables rate change to 2400 bps

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.

P Pulse Dial

The P modifier can be issued in

Q Result Codes Control



Q1 Result codes disabled

Refer also to the V[n] and X[n] commands.

Result codes enabled

R Data Terminal Ready (



R1 Modem assumes the Command State when DTR transitions from ON to OFF

R3 Modem is reset when DTR transitions from ON to OFF R4 R5 Power Down with DTR toggle (need hard reset)

R0 Modem ignores DTR

assumes the Command State when DTR

DTR

) Action

DTR

RTS

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S[r]?

The S[r]? command requests the modem to report the current value

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.

S[r]$

The S[r]$ command requests the modem to report the current value of register [r]. The value reported is in hexadecimal notation.

S[r]???

The S[r]???… command requests the modem to report the current value of [r] and successive registers. The values are reported in decimal notation. The number of registers reported corresponds to

? (question marks) given to the modem. For an example: S10??? will report the values stored in the registers S10, S11, S12.

S[r]$$$

The S[r]$$$… command requests the modem to report the current

rted in hexadecimal notation. The number of registers reported corresponds to the number of $ (dollar signs) given to the modem. For an example: S10$$$ will report the values sto red in the registers S10, S11, S12.

S[r]=[n]

S[r]=[n] Set S-Register Value r = 0 to 104 n = 0 to 255 The S[r]=[n] command allows you to set (modify) the value of any of register [r] to new value [n]. The value [n] is entered in decimal notation.

S[r]=n.$n.n.$n…

The S[r]=n.$n.n.$n… command allows you to set (modify) the value of any of [r] and successive registers to the new values n (decimal notation) or $n (hexadecimal notation). For an example: S10=$F0.128.$EC.25 will set register S10=F0 (hexadecimal), S11=128 (decimal), S12=EC (hexadecimal), and S13=15 (decimal).

l hexadecimal values must be entered in as a two digit hex value. For

example enter $0A instead of $A.

S[r]+[n]

The S[r]+[n] command sets bits in [r] S register by ORing the [n] value and the value currently in the S Register.

S[r]-[n]

The S[r]+[n] command clears bits in [r] S register by ANDing the [not n] value and the value currently in the S Register. All bits set in the mask [n] will be cleared in the S register.

Causes the modem to tone dial.

conjunction with the dial command, or alone, to designate

the method used for subsequent dialing.

S S Register Monitoring

of register [r].

the number of

value of [r] and successive registers. The values are repo

T Tone Dial

The T modifier can be issued in

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Asynchronous mode. No speed buffering, no prot ocol.

Synchronous mode. No speed buffering, no protocol.

Quasi-Synchronous mode. Allows the transmis sion and reception of

Asynchronous with speed buffering. Allows fix ed DTE-DCE speed so connection results.

V Verbose/Numeric Result Codes Selection

V0 Numeric result codes – Format <CR>digit(s)<CR>



V2 Numeric result codes - Format <CR><LF>digit( s)<CR><LF>

Refer also to the Q[n] and X[n] commands

V1 Verbose result codes – Format <CR><LF>word< CR><LF>

Y Asynchronous/Synchronous Mode Selection



synchronous data through an asynchronous DTE by stripping off start and stop bits on transmission and adding them on reception (See V42 operation).

applications do not need to change the communications rate based on

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Do not return extended result codes (40-80). The message CONNECT followed by the data rate between the DTE and the modem wi ll 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. All extended result codes are disabled

W Extended Result Codes Selection



0 OK 13 CONNECT 7200 1 CONNECT 14 LINE-IN-USE 2 RING 22 CONNECT 75/1200 3 NO CARRIER 23 CONNECT 1200/75 4 ERROR 5 CONNECT 1200 40 CARRIER 300 6 NO DIALTONE 41 CARRIER 600 7 BUSY 44 CARRIER 1200/75 8 NO ANSWER 45 CARRIER 75/1200 9 CONNECT 600 46 CARRIER 1200 10 CONNECT 2400 47 CARRIER 2400 11 CONNECT 4800 70 PROTOCOL:NONE

Result codes

Numeric

value

Verbose

value

Numeric

value

Verbose

value

Extended Results Codes:

12 CONNECT 9600 77 PROTOCOL:LAP-M

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+ ext.

0, 2, 4, 6, 14

0, 2, 4, 6, 14 +

0, 2, 4, 6, 14

0 – 1, 3 – 5,

0–1, 3–5,

+ ext.

0–1, 3–5,

0, 2 – 4, 14

0 – 1, 3 – 5, 7,

0–1, 3–5, 7,

+ ext.

0–1, 3–5, 7, 9-

0, 2, 4, 6, 14

0, 2, 4, 6, 14 +

0, 2, 4, 6, 14

0 – 1, 3 – 5, 7,

0–1, 3–5, 7,

+ ext.

0–1, 3–5, 7,

0, 2 – 4, 7, 14

0 – 1, 3 – 5,

0–1, 3–5, 9–

+ ext.

0–1, 3–5,

0, 2, 4, 6 - 7,

0 – 1, 3 – 5,

0–1, 3–5, 9–

0–1, 3–5,

0, 2 – 4, 7, 14

0 – 1, 3 – 5, 7,

0–1, 3–5, 7,

0–1, 3–5, 7, 9-

0, 2, 4, 6 - 7,

0 – 1, 3 – 5, 7,

0–1, 3–5, 7,

0–1, 3–5, 7, 9-

X Result Codes Set and Dialing Capabilities Selection

X0 Enable Result Codes 0-4, 14 X1 Enable Result Codes 0-5, 10-14 X2 Enable Result Codes 0-6, 10-14 X3 Enable Result Codes 0-5, 7, 10-14



X4 Enable Result Codes 0-7, 10-14 X5 Enable Result Codes 0-5, 10-14 and detect BUSY at OF F HOOK X6 Enable Result Codes 0-6, 10-14 and detect BUSY at OF F HOOK X7 Enable Result Codes 0-5, 7, 10-14 and detect BUSY at OF F HOOK X8 Enable Result Codes 0-7, 10-14 and detect BUSY at OFF HOOK

See Result Codes table under W command.

W0 W1 W2 W0 W1 W2

0, 2 – 4, 14 0, 2 – 4, 14 0, 2 – 4, 14 0 – 1, 3 – 4, 0, 2 – 4, 14 0, 2 – 4, 14

Pre Dial Post Dial

0–1, 3–4, 14 0–1, 3–4, 14

+ ext.

ext.

+ ext.

ext.

0, 2 – 4, 14 0 – 1, 3 – 5,

9 – 14, 22, 23

9 - 14, 22, 23

0–1, 3–5,

9–14, 22, 23

0–1, 3–5,

9-14, 22, 23

4, 22, 23

9–14, 22, 23

+ ext.

14 + ext.

+ ext.

14 + ext.

9 - 14, 22, 23

14, 22, 23

+ ext.

9–14, 22, 23

+ ext.

9–14, 22, 23

+ ext.

9-14, 22, 23

14, 22, 23

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Asynchronous mode. No speed buffering, no prot ocol.

Synchronous mode. No speed buffering, no protocol.

Quasi-Synchronous mode. Allows the transmis sion and reception of bits on transmission and adding them on reception (See V42 operation).

connection results.

The Z command resets the modem. The Z command is equivalent to a power cycle. Additional commands are not allowed in the command string.

The @C[r]=[n] command allows you to set (modify) the

or hexadecimal($ prefix) notation.

The @C[r]=n.$n.n.$n… command allows y ou to set

$0A instead of $A.

the Register.

the register.

Y Asynchronous/Synchronous Mode Selection

Y6 Asynchronous with speed buffering. Allows fix ed DTE-DCE speed so



synchronous data through an asynchronous DTE by stripping off start and stop

applications do not need to change the communications rate based on

Z Reset

@C Configure Registers

The @C command modifies the MicroDAA register value.

@C[r]=[n], Set Register Value r = 0 to 31($1F), n = 0 to 255($FF)

value of any of MicroDAA register [r] to new value [n]. The value [n] and [r] can be either in decimal(n o prefix)

@C[r]=n.$n.n.$n… command allows you to set (modify) the value of any of [r] and successive registers to the new values n (decimal) or $n (hexadecimal).

@C[r]+[n] command sets bits in [r] register by ORing the [n] value and the value currently in the

@C[r]-[n] command clears bits in [r] register by ANDing the [not n] value and the value currently in

@D Dump Registers

The @D command dumps entire MicroDAA registers.

(modify) the value of any of [r] and successive registers to the new values n (decimal) or $n (hexadecimal). For an example: @C$10=$0F.128.$EC.25 will set Register $10=$F0, Register $11=128 (decimal), Register $12=$EC and S13=15 (decimal).

must be entered in as a two digit hex value. For example enter

The @C[r]+[n] command sets bits in [r] regi st er by ORing the [n] value and the value currentl y in the Register.

The @C[r]-[n] command clears bits in [r] register by ANDing the [not n] value and the value currentl y in the Register. All bits set in the mask [n] will be cleared in

All hexadecimal values

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Terminates the softmodem application gracefully and goes to Linux prompt. root directory.

During a data connection, the escape command (+++) returns you to Command state

terminating the data connection so you can enter AT commands. The TSC Softmodem supports the TIES (Timing Independent Escape Sequence) escape, not the patented Hayes escape. The +++ must be followed by a valid AT command for the escape

AT command follows the +++, the modem will return to the data

line

command state.

@L[n] Set Lease Line Operation

Lease line operation is des ignated by S89 bit 2

n = 1 Sets lease line bit n = 0 Clears lease line bit

@Z Escape to OS

To return to Softmodem application from t he li nux prompt, type “tsc_1922_CRLF” from the

+++ Escape Sequence

without

to be recognized. If a nonmode. Giving the TSC Softmodem a “+++AT” is also valid for escaping to the on-

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2.2 S-Registers

2.2.1 S-Register Overview

The S register set found in the TSC Softmodem is modeled after the Hayes S-registers, but differ in m any respects. The Hayes register set has evolv ed over time to support added features, and the TSC Softmodem has many features not found in ot her m odems. As is true for the AT commands, the Hayes format is loosely followed, but it should not be assumed that software driver configurations written for another modem will work without some modificati ons. Closely examine the register set and assure the commands sent to the TSC Softmodem will giv e the intended actions.

The S-Registers allow you to customize the modem's operation. For example, you can use S-Registers to determine how many times the telephone will ring before the modem answers, how long the modem will wait for a dial tone before aborting a dialing sequ ence, how long the modem will pause during a "pause" command, and so on. S-Registers are chang ed with the S[r]=[n] command.

You can check your S-Register settings any time you are in Command State. To check an S-Register setting, enter a command consisting of the S-Register you want to check followed by a question mark. For example, to check how long the modem will wait for a di al tone before aborting a call, type in the following command:

AT S6? <Enter> The screen will display the current settin g of S-Register S6. To change an S-Register setting, enter a command consisting of the S-Register, an equal (=) sign, and

the desired value (in decimal). For example, t o set the modem to answer after three rings, type the following command:

AT S0=3 <Enter> Note: For more details on the commands to check or modify S-Registers see the S command under the

paragraph “AT” command set.

List Of S-Registers The S-Registers you can change with the S[r] =[ n] command, or whose value you can check with the S[r]? command, are listed below:

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This register specifies the ring on which the modem will answer. A value of 1 to 255 will

answer mode and cause it to answer on that many rings

detected.

When the modem is set for Auto-Answer, register S1 keeps track of the number of times

on time, the S1 register is reset to 0 after the sum of

S56 and S58 seconds has elapsed.

2.2.1.1 TR30.2-Style Contr ol and Status Registers

S0 Auto Answer

n 0 –255



1-255 Auto answer mode on selected number of rings

0 Auto answer disabled

place the modem in auto-

S1 Ring Count

n 0 –255



0 No valid rings detected

the phone rings. After the end of ring-

S2 Escape Code Character

n 0 – 127 (ASCII)



>127 Escape feature disabled

43 ASCII “+”

S3 Carriage Return Character

n 0 – 127 (ASCII)



This character terminates both the command line and the result codes.

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13 <CR>

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When X0, X1 or X5 mode is selected, the modem will dial after the time set in S6 has elapsed since going off hook.

The S7 register performs two functions. It sets the maximum time between dialing and responding to an incoming carrier signal. It also sets the duration of the pause generated by the W dial string modifier.

S4 Line Feed Character

n 0 –127 (ASCII)



0 Suppress <LF> after the <CR> in a resul t code

Applicable only when verbose mode (V1) is selected.

10 <LF>

S5 Backspace Character

n 0 –32 and 127 (ASCII)



S6 Wait Before Blind Dial

n 1 – 255 seconds



8 <BS>

Country selection

dependent (S99)

2 2 seconds

S7 Wait For Carrier After Dial

n 0 – 254 seconds



50 50 seconds

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The S8 register sets the number of seconds the modem will pause during a pause created The effective time will range from (n-1) to n se conds.

The S9 register sets how long a carrier signal must exist before the modem issues a

line state is governed by the times specified by S9 and S10. The DCD is the carrier detect indicator. If the carrier signal goes off, DCD goes off within 20 ms. If the carrier returns, CD turns on within 20 ms after the

y for the time specified by S9. If CD is off for the time specified by S10, then carrier is lost and the modem hangs up. If S10 is set to 255, the modem will not hang up.

The S10 register sets (in 10ths of a second) the delay time between loss of carrier and the modem hanging up. After the S10 delay time, the modem hangs up and returns to Command State and the modem sends the NO CARRIER response.

S8 Pause Time For Comma

n 1 – 254 seconds



2 2 seconds

by a "," (comma) in the dialing sequence.

S9 Carrier Detect Response Time

n 1 – 254 in 100 ms unit



6 600 ms

carrier detect response. Note: Carrier detection while the modem is in the on-

carrier has been on continuousl

S10 Lost Carrier Hang Up Delay

n 0 – 254 in 100ms unit



255 Carrier detect status ignored, no hang up

14 1.4 second

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S99 provides an easy way to set up the TSC Softmodem for different countries with a single command. This command sets the dial tone and busy tone detection parameters as well as the DTMF and pulse timing, DCIV settings, and AC impedance. Normally no other commands are required to match a selected country’s requirements. Transmission levels and detection threshold can be adjusted through other S registers compensate if your DAA

registers, it should be set at the beginning of the AT

string, but never preceding the F command (i.e. A T FS99=1… is OK, but not ATS99=44F)

tones for tone dialing. (Setting this value lower than 50 may produce inaccurate dialing.) This register does not affect pulse dialing.

Country selection

Country support

S99 Preset Country Selection

0 CTR21



33 France 34 Spain 39 Italy 44 United Kingdom 49 Germany 61 Australia

81 Japan 86 China 886 Taiwan 82 S. Korea

1 USA / Canada

specifications require further changes. Since the S99 register affects multiple

Originate functions

Dialing functions

S11 DTMF Ton/Toff Dialing Speed

n 20 – 211 in ms



24 Rev. 1.5

70 Ton = Toff = 70 ms

The S11 register sets the duration and spacing of touch-

dependent (S99)

UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide

Selects the digit to be dialed as well as the desired twist between the low and the high

filled

For test operation, both the twist and the digit must be filled. See J

command.

S12 DTMF / Twist Dial Register



N/A Twist 2 Twist 1 Twist 0 DTMF3 DTMF2 DTMF1 DTMF0

 0 0 0 1 1 697 1209 0 0 1 0 2 697 1336 0 0 1 1 3 697 1477 0 1 0 0 4 770 1209 0 1 0 1 5 770 1336 0 1 1 0 6 770 1477 0 1 1 1 7 852 1209 1 0 0 0 8 852 1336

32 D digit selected, 2dB twist.

frequency. For normal operation, only the twist needs to be set once. The digit will be automatically.

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

DTMF3 DTMF2 DTMF1 DTMF0 Digit Low tone High Tone

0 0 0 0 D 941 1633

1 0 0 1 9 852 1477 1 0 1 0 0 941 1336 1 0 1 1 * 941 1209 1 1 0 0 # 941 1477 1 1 0 1 A 697 1633 1 1 1 0 B 770 1633 1 1 1 1 C 852 1633

0 0 0 No twist, 0 dB nominal. 0 0 1 low frequency 1 dB below the high frequency tone.



0 1 1 low frequency 3 dB below the high frequency tone. 1 0 0 low frequency 4 dB below the high frequency tone. 1 0 1 low frequency 5 dB below the high frequency tone. 1 1 0 low frequency 6 dB below the high frequency tone. 1 1 1 low frequency 7 dB below the high frequency tone.

Twist2 Twist1 Twist0 Relative level

0 1 0 low frequency 2 dB below the high frequency tone.

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Attenuation level can go from +4.0 dB to –11.0 dB fro m nom inal . DTMF gain increments have to be a minimum of 1dB, while for CP/Data the minimum is 2dB gain increments.

This coefficient affect the transmit value, thus the overall transmit level of the DTMF tones, sent to the DAC. A higher value, yet increasing the DTMF level transmitted, also increases

Refer to the “Transmit levels at 3.3V operations” application note for further details.

S13 DTMF-Data / Transmit Attenuation



0 0 1 0 X 0 1 0 +4.0 dB 1 0 1 0 X 0 1 0 +3.0 dB

DTMF 0 0 0 1 X 0 0 1 +2.0 dB

1 0 0 1 X 0 0 1 +1.0 dB

CP/Data 0 0 0 0 X 0 0 0 0.0 dB

1 0 0 0 X 0 0 0 -1.0 dB 0 1 1 1 X 1 1 1 -2.0 dB 1 1 1 1 X 1 1 1 -3.0 dB 0 1 1 0 X 1 1 0 -4.0 dB 1 1 1 0 X 1 1 0 -5.0 dB

16 0dB nominal for call progress and data, +2dB nominal for DTMF

DTMF CP / Data Level

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Gain/Atten

0 1 0 1 X 1 0 1 -6.0 dB 1 1 0 1 X 1 0 1 -7.0 dB 0 1 0 0 X 1 0 0 -8.0 dB 1 1 0 0 X 1 0 0 -9.0 dB 0 0 1 1 X 0 1 1 -10.0 dB 1 0 1 1 X 0 1 1 -11.0 dB

S85 DTMF- DAC transmit level coefficient

n 60 – 127



60 Default value.

the level of signal distortion. This coefficient only affects DTMF transmission.

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Country selection

S32 Pulse Dial Make Time

n 1 – 211 in ms unit



39 39 ms

S33 Pulse Dial Break Time

N 1 – 211 in ms unit



61 61 ms

S34 Pulse Dial Inter-digit Time

N 1 – 211 in 10 ms unit



75 750 ms

dependent (S99)

Country selection

dependent (S99)

S72 Pulse Map \ CID control \ Black Listing control



64 10 pulses for 0; D pulses for D from 1 to 9; no CID, no blacklisting

dependent (S99)

Bit 1-0



00 10 pulses for 0; D pulses for D from 1 to 9 01 10 pulses for 0; 10-D pulses for D from 1 to 9 10 D+1 pulses for D from 0 to 9

Bit 2 Set user control on V24 outputs (CTS, RI…) – See Application Notes - Bit 3 Enables CID wetting pulse through RELAY signal Bit 4 Japanese Caller ID – Off hook CID processing Bit 5 Japanese Caller ID – Marks start the CID preamble -



Bit 6 Reserved Bit 7 Black Listing option enabled Sets the relation between the digit D and the digi t pulse dialed.

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Enables control over what the modem will qualify as answer tone. By default, the modem functions as it has in the past. (Default = $35)

S92 Status Register 4



Bit Value Bit 0 Reserved Bit 1 Reserved Bit 2 0 Pulse dialing disabled



All others bits are reserved.

4 pulse dialing allowed.

1 Pulse dialing enabled

S86 Flash (!) / On Time

n 1 – 211 in 10 ms unit



50 500 ms

S87 Flash (!) / Off Time

n 1 – 211 in 10 ms unit



50 500 ms

Note:

Call progress functions

dependent (S99)



Bit1/0



01 10

11 Connection messages are muted Bit 2 X Reserved Bit 3 0 Escape sequence disabled

 

1 Dual cadence for dial tone



1 Dual cadence for busy tone



1 Dual cadence for busy ring

136 See following. A bit set to 1 selects the function.

Bit 1/0 00

1 Escape sequence enabled

Bit 4 0 Alternate cadence for dial tone

Bit 5 0 Alternate cadence for busy tone

Bit 6 0 Alternate cadence for ring

Bit 7 0 Continuous dial tone disabled



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1 Continuous dial tone enabled

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CLI 125 mS AT command delay enabled (disable this option for faster response time to AT commands).

Country selection

S73 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 Reserved



Bit 5

Bit 6 Adaptive dialing enabled Bit 7 Reserved

S66 Dial Tone / Wait For Dial Tone Time

n 1 – 254 in second



8 8 seconds

Sets the maximum number of seconds the modem waits for dial tone.

S67 Dial Tone / Qualify Dial Tone Time

n 0 – 254 in 10 ms unit



120 1.2 second

Sets the minimum duration for dial tone.

S35 Dial Tone / Cadence A Minimum On Time

n 0 – 255 in 40 ms unit



0 0 ms

dependent (S99)

S36 Dial Tone / Cadence A Maximum On Time

n 0 – 255 in 40 ms unit

30 Rev. 1.5

dependent (S99)

UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide

Country selection



0 0 ms

S37 Dial Tone / Cadence A Minimum Off Time

n 0 – 255 in 40 ms unit



0 0 ms

S38 Dial Tone / Cadence A Maximum Off Time

n 0 – 255 in 40 ms unit



0 0 ms

S39 Dial Tone / Cadence B Minimum On Time

n 0 – 255 in 40 ms unit



0 0 ms

dependent (S99)

S40 Dial Tone / Cadence B Maximum On Time

n 0 – 255 in 40 ms unit



0 0 ms

S41 Dial Tone / Cadence B Minimum Off Time

n 0 – 255 in 40 ms unit



0 0 ms

S42 Dial Tone / Cadence B Maximum Off Time

n 0 – 255 in 40 ms unit



0 0 ms

Country selection

dependent (S99)

Country selection

dependent (S99)

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Country selection

S23 Busy Detection Cadence Cycle Count



3 3 busy cadence cycles selected.

Defines how many busy cadence cycles before se nding the busy result code.

S43 Busy Tone / Cadence A Minimum On Time

dependent (S99)

n 0 – 255 in 40 ms unit



10 400 ms

S44 Busy Tone / Cadence A Maximum On Time

Country selection

dependent (S99)

n 0 – 255 in 40 ms unit



15 600 ms

S45 Busy Tone / Cadence A Minimum Off Time

n 0 – 255 in 40 ms unit



10 400 ms

S46 Busy Tone / Cadence A Maximum Off Time

n 0 – 255 in 40 ms unit



15 600 ms

S47 Busy Tone / Cadence B Minimum On Time

n 0 – 255 in 40 ms unit



0 0 ms

dependent (S99)

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Country selection

S48 Busy Tone / Cadence B Maximum On Time

dependent (S99)

n 0 – 255 in 40 ms unit



0 0 ms

S49 Busy Tone / Cadence B Minimum Off Time

n 0 – 255 in 40 ms unit



0 0 ms

S50 Busy Tone / Cadence B Maximum Off Time

n 0 – 255 in 40 ms unit



0 0 ms

S20 Call Progress Selection

dependent (S99)

Country selection

dependent (S99)



17 Imprecise tones detection only.



Busy tone bits 7-4/ Dial tone bits 3-0

Bit 7/3 Bit 6/2 Bit 5/1 Bit 4/0 Function

0 0 0 1 Detect Imprecise tones ONLY. 0 0 1 0 Detect All Precise tones ONLY. 0 1 0 0 Detect Any of the Precise tones.

S88 Imprecise Filter Selection



Bits 3-0 Pre dial imprecise filter selection (di al tone) Bits 7-4 Post dial imprecise filter selection (bu sy tone)

0 Filter 280-680Hz selected for pre and post dialing

Value

Frequency range

dependent (S99)

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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.

0 280Hz – 680Hz 1 370Hz – 500Hz 2 240Hz – 580Hz 3 200Hz – 650Hz 15 User defined filter

S19 Precise Call Progress Selection

Country selection

dependent (S99)



195 350Hz and 440Hz are dial tones; 440Hz and 620Hz are Busy tones.

 

Bit 0 Selection of 350Hz as a dial tone

Bit 1 Selection of 440Hz as a dial tone Bit 2 Selection of 480Hz as a dial tone Bit 3 Selection of 620Hz as a dial tone Bit 4 Selection of 350Hz as a busy tone Bit 5 Selection of 440Hz as a busy tone

 

Bit 6 Selection of 480Hz as a busy tone

Bit 7 Selection of 620Hz as a busy tone

S63 Precise Call Progress Detect



0 See following.

Bit 0 Detected f0 (350 Hz). Bit 1 Detected f1 (440 Hz). Bit 2 Detected f2 (480 Hz). Bit 3 Detected f3 (620 Hz). Bit 4 Detected 2130 Hz. Bit 5 Detected 2750 Hz. Bit 6 Busy tone detection enabled. Bit 7 Call Progress filter #1 detect bit.

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S75 determines at what minimum level imprecise call progress tones are detected before

value corresponds to a lower signal level. The dBm level depends on the

DAA used.

S76 determines at what minimum level imprecise call progress tones are detected after Refer to table under S75.

S77 determines at what minimum level precise call progress tones are detected before Refer to table under S75.

Country selection

S75 Pre Dial Call Progress Imprecise Detect Level

dependent (S99)

n 1 - 96



30 -45dBm threshold.

dialing. A larger

dBm0 S75-S78 dBm0 S75-S78 dBm0 S75-S78 dBm0 S75-S78

-25 3 -31 6 -37 12 -43 24

-26 3 -32 7 -38 14 -44 27

-27 4 -33 8 -39 15 -45 30

-28 4 -34 9 -40 17

-29 5 -35 10 -41 19

-30 5 -36 11 -42 22

S76 Post Dial Call Progress Imprecise Detect Level

n 1 - 96



30 -45dBm threshold.

dialing.

S77 Pre Dial Call Progress Precise Detect Level

n 1 - 96



30 -45dBm threshold.

dialing.

dependent (S99)

Country selection

dependent (S99)

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S78 determines at what minimum level precise call progress tones are detected after dialing. Refer to table under S75.

7 128

V23

Country selection

S78 Post Dial Call Progress Precise Detect Level

n 1 - 96



30 -45dBm threshold.

dependent (S99)

S15 Calling Tone Off Time

n 0 – 255 in 100 ms unit



Calling tone is defined as a 1300Hz tone. See S28 / bit 7 for enabling/disabling calling tone

17 1.7 second

S16 Calling Tone On Time

n 0 – 255 in 10 ms unit



Calling tone is defined as a 1300Hz tone. See S28 / bit 7 for enabling/disabling calling tone

60 600 ms

Data functions

S30 Data Modulation Selection



Bit Value Mode 0 1 4-Wire mode 1 2 Bell202

 

4 16 Bell212

108

See following. Precedence is from the highest to the lowest con nection data rate.

2 4 V22bis 3 8 V22

 

36 Rev. 1.5

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Allows programmable delay between completion of handshake and connect (ready for

ms increments. The Default delay times are as follows:

QAM Answer Mode = 200 ms

FSK Originate Mode = 300 ms

Selects V.23H 1200/75 bps Asymmetric Duplex mode.

Selects V.23H 1200 bps Half Duplex mode.

Bit 1-7

Reserved

S31 Data Modulation Status



0 1 Successful 4-Wire connection 1 2 Successful Bell 202 connection 2 4 Successful V22bis connection 3 8 Successful V22 connection 4 16 Successful Bell 212 connection 5 32 Successful Bell 103 connection 6 64 Successful V21 connection 7 128 Successful V23 connection

0 Default value until connection is established

Bit Value Mode

S119 Wait Bef ore Connect

data). User should be careful; Host will have to complete delay period before transmitting data. Setting the value at this register will affect timing for all modes. Resolution is in 10

PSK Answer Mode = 770 ms PSK Originate Mode = 770 ms

NOTE: Special mode when S119 = $FF (Default), uses same value of wait as in the past.

S124 V23 Half Duplex Enable

Enables half duplex “ping-pong” mode. (Default = 0)

Bit 0

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No protocol detection selected. Modem looks for ODP/ADP on connection. This is used when the host does not do the initial protocol detection.

V42-LAPM protocol selected. This option enables the ODP/ADP sequence detection support within the TSC Softmodem if not supported by the host processor.

When a connection is made and the selected protocol is detected an appropriate result

PROTOCOL:

NONE or result code ‘70’ will be sent.

S79 determines at what minimum level carrier is detected for originating FSK. A larger number corresponds to a lower signal level threshold.

is detected for answering FSK. A larger

number corresponds to a lower signal level threshold.

S81 determines at what minimum level carrier is detected for originating PSK. A larger number corresponds to a lower signal level threshold.

S25 Protocol Selection



Bit 0 1 Disconnect if no protocol is detected

Bit 1 1

code is returned: PROTOCOL: NONE or ‘70’ PROTOCOL: LAPM or ‘77’ If 1.5 seconds after CARRIER is established, and no protocol is detected,

S79 FSK Originate Carrier Detect Level

n 1 – 96



35 -45dBm threshold.

S80 FSK Answer Carrier Detect Level

n 1 – 96



35 -45dBm threshold.

S80 determines at what minimum level carrier

S81 PSK Originate Carrier Detect Level

n 1 – 96



40 -45dBm threshold.

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S82 determines at what minimum level carrier is detected for answering PSK. A larger number corresponds to a lower signal level threshold.

S83 determines at what minimum level carrier is detected for originating QAM. A larger number corresponds to a lower signal level threshold.

S84 determines at what minimum level carrier is detected for answering QAM. A larger number corresponds to a lower signal level threshold.

This register sets the Inactivity timeout for data mode. If there is no transmitted or received

S82 PSK Answer Carrier Detect Level

n 1 – 96



35 -45dBm threshold.

S83 QAM Originate Carrier Detect Level

n 1 – 96



40 -45dBm threshold.

S84 QAM Answer Carrier Detect Level

n 1 – 96



35 -45dBm threshold.

S117 Inactivity Timeout

n 0 – 255 in seconds



0 Feature disabled

data for the duration of this timer the modem wil l terminate the call.

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Black Listing function

S105 Pre Call attempt delay

n 1 – 254 in seconds



Delay prior attempting a call (after an ATD… com m and is issued)

5 5 seconds

S106 Delay between 1st and 2nd attempt

n 1 – 254 in seconds



Delay between 1st and 2nd call attempt to the same number in a series.

5 5 seconds

S107 Delay between Nth and N+1th attempt

n 1 – 254 in seconds



Delay between Nth and N+1th call attempt to the same number in a series.

60 60 seconds

S108 Maximum successive failed attempts

N 1 – 254 in unit



Sets the maximum number of successive failed call attempts allowed.

15 15 consecutive failed call attempts

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This register controls the ring amplitude threshold and selects hardware or software ring detection. (Default = 0)

Ring Amplitude Detection Threshold. Lower v al ue detects lower amplitude ring signal.

1 = No frequency checking, enables phonex operat i on

0 = Frequency and amplitude checking, normal operation.

Auto detect phonex mode, the modem will automatically detect an user phonex system and configure itself accordingly.

Force soft ring detection with frequency qualification for non-Phonex operation. Recommend value of 7 (or 2 for very Low Amplitude and Frequency detection).

Force soft ring detection with no frequency quali fication for Phonex operation. Recommend value of 170.

Assumes a half wave detection circuit. Note: The values need to be doubled if a full wave detector is used.

Country selection

S109 Delay between series

N 0 – 254 in minutes



Sets the delay before another series of call attempts is allowed.

0 Disabled – only 1 series allowed

Answering functions

S123 Software Ring Detect

Bits 0-6 Bit 7

Special Values for S123: =0 Disable soft ring detect, use hardware ring.

=255 =1–127

128–254

S17 Ring / Minimum Frequency Detection

n 0 – 253 in Hz

 10 10 Hz

dependent (S99)

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Assumes a half wave detection circuit. Note: The values need to be doubled if a full wave detector is used.

Country selection

S18 Ring / Maximum Frequency Detection

dependent (S99)

n 1 – 254 in Hz



75 75 Hz

S51 Ring / Cadence A Minimum On Time

dependent (S99)

n 0 – 255 in 40 ms unit



40 1.6 s

S52 Ring / Cadence A Maximum On Time

dependent (S99)

n 0 – 255 in 40 ms unit



60 2.4 s

S53 Ring / Cadence A Minimum Off Time

n 0 – 255 in 40 ms unit



80 3.2 s

S54 Ring / Cadence A Maximum Off Time

n 0 – 255 in 40 ms unit



120 4.8 s

S55 Ring / Cadence B Minimum On Time

n 0 – 255 in 40 ms unit

dependent (S99)

Country selection

dependent (S99)



0 0 ms

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Caller ID.

Country selection

S56 Ring / Cadence B Maximum On Time

n 0 – 255 in 40 ms unit



0 0 ms

S57 Ring / Cadence B Minimum Off Time

n 0 – 255 in 40 ms unit



0 0 ms

S58 Ring / Cadence B Maximum Off Time

n 0 – 255 in 40 ms unit



0 0 ms

dependent (S99)

S74 Billing Delay Time

dependent (S99)

n 20 – 254 in 100 ms unit



20 2 seconds

This register sets the duration of billing delay i n uni ts of 100 ms.

Caller ID functions

S95 Caller ID configuration



Bit 0 Dual Tone Alert Signal expected

Bit 1:2



Bit 4 Caller ID enabled. Applies only to On-Hook/Offline/Type I Caller ID.

136 CID disabled

Number (0-3) of Line Reversal or Ring Pulse Alert S i gnal s ex pected before

Bit 3 CID between 1st and 2nd ring

Bit 5 0= FS K , 1 = DTMF based signaling for CID

Bit 6 Enables using USR11 to measure DC offset when entering Idle state

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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

signaling state for

LIU-E detection.

Special modes:

marks (Type 2 Snoop).

Disables ring interrupt detection for the specified period of time during CID enable/disable transitions, measured in ms. Default = 20

VFI fast connect originate handshake when specifying Bell 212 only in S30. This works for Bell 212A and V.22 when S30 is set only for

selected.



S95 = 0X01 0000B S95 = 0X110000B S95 = 10011001B

enables using USR 11 output to signal DAA to enter idle line

Continuous FSK Caller ID mode. Continuous DTMF - send detec ted d igits to DTE w ithou t “CID :” me ssage. Detect US Type 1 and Type2 Snoop CID simultaneously. In this mode the modem may automatically modify S72 register bit 5 to loo k for Dots ( Type1) or

S118 Caller I D Ring Int er r upt Delay

=n is disable time in mS.

Line In Use and Parallel Pick Up detection functions

S89 Parallel Pick-up Energy Detection (Default=0)

0 PPU disabled

Bit Value Bit 1,0 00-11 N command value Bit 2 0 Reserved Bit 3 1 PPU Energy (PPU-E) detection enabled Bit 4 1 Inverts ring input polarity for PPU-V (Default is RingB active low) Bit 5 1 Inverts ring input polarity for LIU-V (Default is RingB active low)

Bit 6 1

Bell 212A. Other modes cannot be specified in S30. Will send FLAGS as part of the handshake when Y 1 or Y4 is

Bit 7 1 Reserved

S110 Line-In-Use/Parallel Pick Up Configuration Register



112 No LIU or PPU enabled.

Bit Value

Bit 0 1 Enables Off-Hook Voltage sensing Parallel pick-up det. (PPU-V)

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Enables Call-Waiting Caller-ID option. This bit applies only to OffHook/Online/Type II Caller-ID.

hook LIU

Bit 7

Enables Long Space Disconnect. When enabled, the TSC Softmodem sends 3.5 seconds of NULL characters before disconnecting upon reception of an on hook command from the host;

reception of 1.5 second of NULL characters

from the remote modem.

This register sets the settling time to wait, after the LIU sensing circuit is enabled, before

hook

(PPU) detection.

Sets the Threshold for the voice Energy. Lower number means higher signal threshold. The value of 0 would effectively never detect and higher than 95 would always detect. This register is also use by (J7) test mode as a minimum carrier det ect threshold.

Bit 1 1 Enables On-Hook Line-In-Use Voltage sensing detection (LIU-V) Bit 2 1 Enables On-Hook Line-In-Use Energy sensing detection (LIU-E)

Bit 3 1

 



Bit 4 1 Enables high impedance TXAN/TXAP while looking for CID

Bit 5 1 Enables receive gain (20 dB) while looking for CID

Bit 6 1

Enables using USER10 output to signal DAA to activate onsensing

and disconnects upon

S111 Line-In-Use Settling time

n 0 –254 in 10ms unit



20 200ms

sampling LIU signal. This is used for both on-hook (Voltage sensing LIU) and off-

S112 Line-In-Use Energy detection Wait

n 0 –254 in 100ms units



This register sets the qualify time that Energy must remain below threshold.

20 2 seconds

S113 Line-In-Use Energy Detection Threshold

n 0 – 95

 60 Default value.

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This register sets the Threshold for PPU to detect loss of Energy compared to the energy level at the time of connection.

S116 Parallel-Pick-Up Energy detection Threshold

n 72, 80, 90.



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

72 1 db energy loss threshold

S122 Parall el Pick Up Debounce Timer

Sets the duration of the parallel pick-up debounce timer in 10m s i ncrements. =n times 10mS.

S14 General Modem Status Register 1



S14 reflects the status of certain options.

Bit Value



1 Receive channel speed buffered.



1 Double Dual cadence detection Bit 1 0 No echo

 

1 Result codes disabled

170 See following.

In data mode

Bit 0 0 Clear channel for receiver.

In Call progress mode

Bit 0 0 Single cadence A or B detection

1 Echo on

Bit 2 0 Result codes enabled

Bit 3 0 Numeric result codes

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Modem assumes the Command State when DTR transitions from

Modem goes on hook, disables Auto Answer and assumes the Command State when DTR transitions from ON to OFF (Auto Answer can be enabled by transitioning DTR from O FF to ON) (R2).

ON indicates the presence of CD (equivalent to C1 command).



1 Verbose result codes



1 First cadence of double cadence matched Bit 5 0 Touch tone dialing

 

1 Connected Bit 7 0 Answer



Bit 4 0 No match

1 Pulse dialing

Bit 6 0 Not connected

1 Originate

S21 General Modem Status Register 2



Bit Value

Bit 0 0 Keypress abort disable.



1 See following.

1 Keypress abort enable.



1 Use raw carrier detect (set by C2 command).



1 Enable V.23 turnaround via DTR toggl e (set by R4 command).



11 Modem is reset when DTR transitions from ON to OFF (R3).



1 DCD



1 RTS / CTS DTE flow control (equivalent to K3).



1 XON / XOFF DTE flow control (equival ent to K4).

Bit 1 0 Use debounced carrier detect

Bit 2 0 Disable V.23 turnaround via DTR toggle.

Bits 4/3 00 Modem ignores DTR (Default ) (R 0)

ON to OFF (R1).

Bit 5 0 DCD always ON (equivalent to C0 command).

Bit 6 0 No RTS / CTS DTE flow control.

Bit 7 0 No XON / XOFF DTE flow control.

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X5 Enable Result Codes 0-5, 10, and detect BUSY at OFF HOOK.

X6 Enable Result Codes 0-6, 10, and detect BUSY at OFF HOOK.

X7 Enable Result Codes 0-5, 7, 10, and detect BUSY at OFF HOOK.

X8 Enable Result Codes 0-7, 10, and detect BUSY at OFF HOOK.

S22 General Modem Status Register 3



0 0 0 Y0 Asynchronous mode 0 0 1 Y1 Synchronous mode 1 0 0 Y4 Pseudo-synchronous mode



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.



1 0 0 0 1 0 1 0

54 See following

Bit 2 Bit 1 Bit 0 Synchronous/Asynchronous control

1 1 0 Y6 Asynchronous with speed buffering

Bit 6 Bit 5 Bit 4 Bit 3 Select result codes

0 1 1 0 X4 Enable Result Codes 0-7, 10. (Default)

1 1 0 0 1 1 1 0

 Bit 7

1 Pulse dialing make/break ration = 33/67

0 Pulse dialing make/break ration = 39/61

S26 Data Mode Control Register



Bit 0 Forces rate change to 1200bps



1 Enables speed negotiation during a retrain request



1 Enables an automatic retrain request to be negotiated

0 See following

Bit 1 0 Disables speed negotiation during a retrain request

Bit 2 0 Disables automatic retrain requests



1 Enables the modem to respond to a retrain request

48 Rev. 1.5

Bit 3 0 Disables retrain request response

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Select 1800 Hz guard tone to be generated during answer mode handshake

Select 550 Hz guard tone to be generated during answer mode

Order of precedence is as follows from highest to lowest: Bit 1, Bit 2, Bit3, Bit 4



1 Enables guard tone generation



1 Enable V.23 turnaround



1 Rx 1200 bps (Bell 202 and V.23 master m ode)

Bit 4 0

handshake

Bit 5 0 Disables guard tone generation

Bit 6 0 Disable V.23 turnaround

Bit 7 0 Tx 1200 bps (Bell 202 and V.23 slave mode)

S27 Call Progress Transmit Register



0 See following.

Bit 0 0 Send “0FFh” characters in pseudo sync (Y4) 1 Do not send “0FFh” characters in pseudo sync (Y4)



1 Transmit 1100Hz



1 Transmit 1300Hz



1 Transmit 2100Hz



1 Transmit 2225Hz Bit 5 Disconnect bit



1 Bell 103, Bell 202, Bell 212A (B1 comm and)



1 Protocol selection done

Bit 1 0 Do not transmit 1100Hz

Bit 2 0 Do not transmit 1300Hz

Bit 3 0 Do not transmit 2100Hz

Bit 4 0 Do not transmit 2225Hz

Bit 6 0 CCITT V22bis, V22, V21, V23 (B0 command)

Bit 7 0 Protocol selection not done

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S28 Fast Connect Status and Calling Tone Enable Register



Bit 0 1 AGC enable



Bit 2 X Reserved Bit 3 1 Synchronous mode (set by Y 1 and Y4) Bit 4 1 Answer tone enable

 

Bit 7 1 Calling tone enable

50 See following.

Bit 1 X Reserved

Bit 5 1 Billing delay enable

Bit 6 1 400ms answer tone at 1200bps

S60 Test Control Register



0 See following

Bit 2 Bit 1 Bit 0 Function

0 0 0 Data mode 0 0 1 Send Marks 0 1 0 Send Spaces 0 1 1 Send Dotting 1 0 0 Send S1 1 0 1 Send S0 1 1 0 Send Dotting ‘A ’ 1 1 1 Send Flags (07Eh)

Bit 3 1 Enable detection of dial tone 0 Disable detection of dial tone



1 Enables the scrambler



1 Enables the de-scrambler Bit 6 1 Enable RLDB mode 0 Disable RLDB mode Bit 7 1 Enable ALB mode

Bit 4 0 Disables the scrambler

Bit 5 0 Disables the de-scrambler

0 Disable ALB mode

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Remote digital loopback detect bit. This bit will be set when a remote digital loopback request has been detected.

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.

Energy detect bit. This bit will be set if the receive level is above a certain threshold.

S1 Detect bit. This will be set if S1 (unscrambled 110011..) is detected. This bit

USB1 Detect bit. This will be set if USB1 (unscrambled binary ones) is detected. This bit is also used to detect a remote digital loopback request if connected in V.22bis or V.22

Detected 1100 Hz (fax calling tone). Detect changes to 1270 Hz at the end of answer Call Progress.

Detected 1300 Hz (data calling tone). Detect changes to 980 Hz at the end of answer Call Progress.

S61 Signal detect Register 1



Bit 0 Reserved

Bit 1

Bit 2

Bit 3 Wait for Calling Tone before sending Answer Tone

Bit 4

Bit 5

Bit 6

Bit 7 Reserved

0 See following. Read only.

is also used to detect a retrain request if connected i n V.22bis or V.22

S62 Signal detect Register 2



Bit 0 Detected 1650 Hz (V.21 answer marks) Bit 1 Detected 1300 Hz. Bit 2 Detected 2100 Hz (ITU answer tone) Bit 3 reserved Bit 4 Detected 2225 Hz (Bell answer tone) Bit 5 Detected 2250 Hz (comp. USB1).

Bit 6 Bit 7

Rev. 1.5 51

0 See following. Read only.

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See following Bit 7 indicates a valid DTMF detection. A register value of zero indicates no

0 indicate the tone pair detected. Works with command J6 and bit 7 have to be set in order to be valid. The following tables define DTMF decodin g:

Low Tone

(Hz)

High Tone

(Hz)

S65 DTMF Detect Register



detect for the polled application. Bits 6 - 4 are reserved. Bits 3 -

Valid N/A N/A N/A DTDET3 DTDET2 DTDET1 DTDET0

1 0 0 0 0 D 941 1633 1 0 0 0 1 1 697 1209 1 0 0 1 0 2 697 1336 1 0 0 1 1 3 697 1477 1 0 1 0 0 4 770 1209 1 0 1 0 1 5 770 1336 1 0 1 1 0 6 770 1477 1 0 1 1 1 7 852 1209 1 1 0 0 0 8 852 1336 1 1 0 0 1 9 852 1477 1 1 0 1 0 0 941 1336 1 1 0 1 1 * 941 1209

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

DTMF Detect bits Dialed Tone Pair Detected

Det Valid DTDET 3 DTDET 2 DTDET 1 DTDET 0 Digit

1 1 1 0 0 # 941 1477 1 1 1 0 1 A 697 1633 1 1 1 1 0 B 770 1633 1 1 1 1 1 C 892 1633

S68 Test Timer



Times how long the self-tests should run in seconds.

52 Rev. 1.5

0 0 second.

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When the N0 command has been issued, register S90 defines the time interval between an

ON. The S90 setting

applies to Synchronous modes only.

Sets the maximum carrier detect threshold used by (J7) test mode. Higher value may indicate open circuit in either TXAP or TXAN signals to RXA. See S115.

Sets the maximum carrier detect threshold used by (J7) test mode. Higher value may indicate open circuit in either TXAP or TXAN signals to RXA. See S114.

S69 Test Error Count



Keeps count of how many errors occur during t he self-test.

0 No error

S70 Auto Retrain Threshold

Forces auto retrain if threshold is below the m ean square error. Default = 16

S90 RTS to CTS Turnaround Delay

n 0 – 255 in 10ms unit



2 20 ms turnaround delay

OFF to ON transition of RTS and when the modem turns CTS

S114 Maximum carrier detect threshold (High Byte)

n 0 - 255



80 Default value

S115 Maximum carrier detect threshold (Low Byte)

n 0 - 255



80 Default value

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2.3 Application Notes for the TSC Softmodem

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A reset of the TSC Softmodem can be performed t hree different ways:

The TSC Softmodem has expanded call progress det ection capabilities. In addition to the

preset frequency filters. At least one range of frequencies will

meet the requirements for call progress detection worldwide. The selection of the filter that

dial phase (busy

Once the frequency filter has been chosen, the threshold of detection needs to be set After the frequency ranges have been selected, the last step is to select the proper cadence of the call progress tones we are about to detect. The TSC Softmodem features

dwide.

There are four different types of cadences defined in the TSC Softmodem. Each parameter

Resetting the TSC Softmodem

• A power-on reset

• Reset Button (similar to power on reset)

• Start the soft modem from Linux prompt

Call Progress Detection

capability of detecting some precise tones ( see S19), the TSC Softmodem implements some imprecise call progress capabilities (wide frequency bandwidth filters). Each call progress tone can be monitored and validated according to the following parameters:

• Frequency

• Level

• Cadence

The TSC Softmodem has 4 will apply during either the pre-dial phase (dial tone) or during the post-

tone) is made through the Imprecise filter tem plate register, S88. The detection bandwidth of the preset filt ers are:

• 280Hz √ 680Hz

• 370Hz √ 500Hz

• 240Hz √ 580Hz

• 200Hz √ 650Hz

In addition, it is possible for a user defined f requency filter. Contact your local TERIDIAN representative for further details on that function.

through registers S75 and S76. Due to the variety of requirements for different countries, there is the provision to select a different t hreshold for both the pre dial and post dial phase. The range of detection thresholds allowed are from –25dBm down to –60dBm. Please note that level detection results may vary due to different line interface implementations.

an expanded support for cadence detection in order to meet requirements worl for those cadences can be selected by the user to m odify the detection criteria.

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Continuous cadence:

ets the requirements for frequency

and level, it will be considered as a valid call prog ress tone after a certain time of validation

Continuous

Validation time

The cadence has a regular On and Off time, A, and provided that it meets the requirements for frequency and level, it will be considered as a valid call progress tone after a certain

Single Cadence A

Cadence A min and max On time

Cadence A min and max Off time

+ Validation time

Single cadence B:

The cadence has a regular On and Off time, B, and provided that it meets the requirements

Single Cadence A

Cadence A min and max On time

Cadence A min and max Off time

+ Validation time

The tone is continuously present and provi ded that it me (see S67 or S23). This is the standard cadence for di al tone detection in most cases.

Single cadence A:

time of validation (see S67 or S23).

for frequency and level, it will be considered as a v ali d call progress tone after a certain time of validation (see S67 or S23).

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Double cadence:

Double Cadence A and B

Cadence A min and max On time

Cadence A min and max Off time

Cadence B min and max On time

Cadence B min and max Off Time

+ Validation time

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 i n 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 Itali an di al tone.

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Since the TSC Softmodem is intended to addres s all the certification requirements

Between brackets is the official document from which the parameters have been extracted.

be supported by selecting the country most similar and

Built in Country Support

worldwide, it has been provided with complet el y flexible features and parameters that can be modified to adapt to virtually any telephone network in the world and any certification requirements. Manually setting all the parameters can oft en be exhausting due to the wide range of requirements that need to be changed for a specific country. The TSC Softmodem has been provided with a built in set of parameters t o address many countries, allowing the user to program all the parameters of the TSC Soft m odem required for specific country through one single register,S99.

The countries supported are:

• USA/Canada (FCC68)

• CTR21 (CTR21/TBR21)

• France (ETS300-001)

• Spain (ETS300-001)

• Italy (ETS300-001)

• United Kingdom (ETS300-001)

• Germany (ETS300-001)

• Australia (TS001/TS002/TS004)

• Japan (NTT/Telephone service interfaces)

• South Korea

• China

• Taiwan

It should be noted that such regulations sometimes give a range of value rather than one specific value. The TSC Softmodem implement s values that not only comply with the regulation but also insure a proper behavior i n the field based on TERIDIAN’s extensive experience in modem applications.

Any country not listed can modifying the required parameters.

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Country implemented (all timing is in secon ds and levels in dBm; see S99 register descriptions) China and Taiwan are identical to USA, except for China transmit level.

Pulse dial interdigit

time

Imprecise dial tone

filter

280/68

detection level

Dial tone precise freq.

350Hz selected

Dial tone precise freq.

440Hz selected

Dial tone precise freq.

480Hz selected

620Hz selected

time

Caden ceA or

Double

USA

Canada

CTR21

S99= 1 0 33 44 39 49 81 61 34 S99

Impedance 00 01 01 01 01 01 00 11 01 ACZ1:0

DC MASK 10 10 10 10 10 10 00 11 10 DAA1:0

Wait for blind dial time 2 4 2 4 4 4 4 4 4 S6

Billing_delay 2 2 2 2 2 2 2 2 2 S74 DTMF_speed 0.070 0.080 0.085 0.085 0.085 0.085 0.085 0.085 0.150 S11

Pulse dial make time 0.039 0.033 0.033 0.033 0.040 0.039 0.033 0.033 0.033 S32

France

Italy

Germany

Japan

Australia

Spain

Affected

Pulse dial break time 0.061 0.067 0.067 0.067 0.060 0.061 0.067 0.067 0.067 S33

0.750 0.850 0.900 0.850 0.880 0.850 0.850 0.850 0.900 S34

Pulse dial map 0 0 0 0 0 0 0 0 0 S72

240/580 370/500 240/580 370/500 240/580 240/580 240/580 240/580 S88

Imprecise Dial tone

Precise Dial tone

Dial tone type

Dial tone precise freq.

Dialtone qualification

Continuous Dial tone Yes Yes Yes Yes No Yes Yes Yes Yes S29

Cadenced Dial tone

-45 -42 -38 -38 -38 -38 -38 -38 -38 S75

-45 -45 -40 -45 -40 -45 -45 -45 -40 S77

Imprecise Imprecise Imprecise Imprecise Imprecise Imprecise Imprecise Imprecise Imprecise

Sel. - Sel. - Sel. - - - Sel. S19 Sel. - - Sel. - Sel. Sel. Sel. - S19

- - Sel. - Sel. - - - - S19

- - - Sel. - - - - Sel. S19

1.2 1.0 0.8 0.8 2.0 0.8 1.0 1.0 1.0 S67

cadenc

Cadence

A or B

Cadence

A or B

Double

cadence

Cadence

A or B

Cadence

A or B

Cadence

A or B

Cadence

A or B

S20

S29

min_on_A_dt 0.000 0.160 0.000 0.000 0.160 0.000 0.000 0.000 0.800 S35 Max_on_A_dt 0.000 0.240 0.000 0.000 0.240 0.000 0.000 0.000 1.200 S36 min_off_A_dt 0.000 0.160 0.000 0.000 0.160 0.000 0.000 0.000 0.080 S37 Max_off_A_dt 0.000 0.240 0.000 0.000 0.240 0.000 0.000 0.000 0.120 S38 min_on_B_dt 0.000 0.480 0.000 0.000 0.480 0.000 0.000 0.000 0.240 S39

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Imprecise busy tone

filter

280/68

detection level

Busy tone precise freq.

350Hz selected

Busy tone precise freq.

440Hz selected

precise freq.

480Hz selected

Busy tone precise freq.

620Hz selected

ceA or

Caden ceA or

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 0.040 S42

240/580 370/500 240/580 370/500 240/580 240/580 240/580 240/580 S88

Imprecise busy tone

Precise busy tone

-45 -45 -45 -45 -50 -55 -45 -45 -45 S76

-45 -45 -45 -45 -50 -55 -45 -45 -45 S78

Busy tone type

Busy tone

Cadenced busy tone

min_on_A_busy 0.400 0.400 0.400 0.240 0.400 0.360 0.400 0.280 0.160 S43

max_on_A_busy 0.600 0.600 0.600 0.520 0.600 0.600 0.600 0.440 0.320 S44

min_off_A_busy 0.400 0.400 0.400 0.240 0.400 0.360 0.400 0.280 0.160 S45

max_off_A_busy 0.600 0.600 0.600 0.520 0.600 0.600 0.600 0.440 0.320 S46

min_on_B_busy 0.000 0.000 0.000 0.000 0.000 0.080 0.000 0.000 0.000 S47

max_on_B_busy 0.000 0.000 0.000 0.000 0.000 0.240 0.000 0.000 0.000 S48

min_off_B_busy 0.000 0.000 0.000 0.000 0.000 0.360 0.000 0.000 0.000 S49

max_off_B_busy 0.000 0.000 0.000 0.000 0.000 0.600 0.000 0.000 0.000 S50

ring_min_Hz 10 10 10 10 10 10 10 10 10 S17

Imprecise Imprecise Imprecise Imprecise Imprecise Imprecise Imprecise Imprecise Imprecise

- - Sel. - Sel. - - - - S19

- - - - - Sel. Sel. Sel. Sel. S19 Sel. - Sel. Sel. Sel. - - - Sel. S19 Sel. - - - - - - - - S19

Caden

Cadenc

eA or B

Cadence

A or B

Cadence

A or B

Cadence

A or B

Cadence

A or B

Cadence

A or B

Cadence

A or B

Cadence

A or B

S20

S29

60 Rev. 1.5

ring_max_Hz 75 75 75 75 75 75 75 75 75 S18

Cadenced ring

min_on_A_ring 1.600 0.800 1.200 0.320 0.800 0.720 0.800 0.320 1.200 S51 max_on_A_ring 2.400 1.200 1.800 0.480 1.200 1.200 1.200 0.480 1.800 S52 min_off_A_ring 3.200 3.200 3.000 0.120 3.200 3.200 1.600 0.080 2.400 S53

max_off_A_ring 4.800 6.000 4.000 0.280 5.000 6.000 2.400 0.280 3.600 S54

min_on_B_ring 0.000 0.000 0.000 0.320 0.000 0.000 0.000 0.320 0.000 S55

max_on_B_ring 0.000 0.000 0.000 0.480 0.000 0.000 0.000 0.480 0.000 S56

min_off_B_ring 0.000 0.000 0.000 1.600 0.000 0.000 0.000 1.600 0.000 S57

max_off_B_ring 0.000 0.000 0.000 2.400 0.000 0.000 0.000 2.400 0.000 S58

Cadenc

eA or B

Cadence

A or B

Double

cadence

Cadence

A or B

Cadence

A or B

Cadence

A or B

Double

cadence

Cadence

A or B

S29

UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide

In addition to the standard V23 recommendation, the TSC Softmodem also adds a special

V23 PAVI operation includes also a Teletel opt i on that is characterized by the transmission

If you are interested by further details on the V 23 operation in the TSC Softmodem, please TERIDIAN’s representative.

A modem may share the phone line with other equipment such as telephone sets or

up detection support

“73M2901CL_AN_LIU-PPU_Rx.x” from y our l ocal TERIDIAN representative.

V23 Operation

feature referred to as V23 PAVI operation. Thi s f eature implements the mechanism to allow the swapping or turn-around of the t ransmission 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.

The process of switching from transmission at 75 bps to 1200 bps is referred as Back to Main Channel Turnaround. The process of switching from transmission at 1200 bps to 75 bps is referred as Main to Back Channel Turnaround.

of some special characters during communic ations. The mechanism of this operation is described i n the following document:

“Spécifications Techniques d’Utilisation du Minitel 1B” - Edition of Nov 1986 -

Edited by :

Ministère des Postes et des Télécommunications Direction Générale des Télécommunicat ions Direction des Affaires Commerciales et Télématiques

request the related application note entitled “73M2901_V23_Operation” from your local

Line in Use/Parallel Pick Up Detection Support

emergency equipment (alarms, etc) and may be programmed to place a call without notifying the customer. Some standards require that the unattended modem have low priority on the line. Therefore the modem shoul d not be allowed to seize the line if the line is in use by any other equipment and should release the li ne as soon as any other equipment tries to place a call. The TSC Softmodem supports two methods of detecting Line-In-Use; by looking at the battery voltage from the central office and by detecting energy on the line from other devices or voi ce, before going off hook. The TSC Softmodem also detects another device going of f hook in parallel with the modem by sensing the drop in voltage caused by the parall el device. When these features are active the modem will immediately relinquish the line to the other device and send a message to the host informing it of the event or condition (LIU-V, LIU-E, PPU-E or PPU-V).

The Line-in-Use/Parallel Pick-up feature of the TSC Softmodem provides the designer support for these features with only a minimum of additional hardware.

If you are interested by further details on the Line In Use/Parallel Pickin the TSC Softmodem, please request the relat ed application note entitled

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The TERIDIAN TSC Softmodem provides two different methods for detecting DTMF tones

mode, enabled by setting the register S95 (ATS95=48), the decoded DTMF tones are sent

to be off

Caller ID application note).

DTMF Tone Detection

being exchanged on the phone line.

method:

1 This method is implemented though a specifi c detection mode enabled by the J6

command. Once the device has entered this m ode, the host processor is required to poll continuously the S65 register in order to det ect a valid DTMF tone. It is possible to increase the polling frequency by disabling the CLI delay in register S73 (ATS73-32). This method halted by the J0 command requires the device to be off hook.

method:

2 Use of the DTMF based caller ID feature can be exploited to detect DTMF tones. In t hat automatically to the host on the RXD lead. This mod e does not require the modem

hook, however an AC coupled signal path must be prov ided from Tip/Ring to RXA (See

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UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide

The TSC Softmodem has been optimized for SMS and V.23 half duplex in general. There

used to control the V23HD carrier. The TSC Softmodem modem is typically initialized with

DCD signals is necessary. CTS indicates that modem is ready to send data.

17. Wait per SMS timing and DCD turn off (SM-SC switched to receive mode)

SMS Applications

are several enhancements that have been added t o the TSC Softmodem to make it more compatible with SMS, including faster turn arou nd and demodulator settling. Normally the modem will be used in the “clear channel” mode (Y0), but this is not mandatory. Speed buffering (Y6) at 4800/9600bps using XON/XO FF (K 4) can also be used instead of Y0 and 1200bps. RTS/CTS (K3) flow control cannot be used because these signals are being

the command string: ATY0B10S73-32C2S10=255 this is broken o ut as follows: Y0 clear channel mode (1200 bps)

B10 V.23 HDX gated by RTS S73-32 no 125ms wait between commands C2 DCD follows the raw received carrie r S10=255 disable l oss of carrier timeout

The following two sequences are typical of how the TSC Softmodem should be used in a communications session. A SMS session can be quite complicated as described in the referenced documentation, so this example sh ould not be interpreted to be all that is required. There are various signal times and time-ou ts that also need to be observed and these all have there own decision trees that need t o be accounted for.

Polling of CTSDCD indicate that receive data is valid. CTS, DCD and RTS are all low true signals at the RS232. RTS-ON to CTS-ON response time is controlled by S9 0 (range 10ms to 2.55s). RTS-OFF to CTS-OFF is <4ms Using C2 carrier option, DCD will turn on after receiv i ng carrier for 10-20ms.

Case 1: SM-TE TSC Softmodem (Master) to SM-SC (Slave) transmission sequence for a SMS message

1. Set the Local Host serial data rate to 1200bps

2. The Local Host controls the V23 carrier with RTS signal

3. Turn off RTS (to start modem as a receiver and prevent sending carrier)

4. Send ATY0B10S73-32C2S10=255 to initialize the TSC Softmodem modem

5. ATDTnnn.. (TE dials SMS-SC)

6. Modem will display "Connect 1200" with CTS off and DCD off

7. Modem waits for V23 carrier from SM-SC

8. Wait for DCD on (SM-SC carrier received)

9. Detect channel seizure and mark from V.23 receiv e data

10. Wait for DLL_SMS_EST signal and DCD turn off (SM-SC switched to receive mode)

11. Turn on RTS (to switch modem to transmit mode)

12. Wait for CTS on to indicate TSC Softmodem is ready to send data

13. Transmit DLL_SMS_INFO_MO originate message to SM-SC

14. Turn off RTS (to switch modem to receive mode)

15. Wait for DCD on (SM-SC carrier is being received)

16. Detect ACK1 message from SM-SC or time-out. The slave will include the TL confirmation or rejection message in the pay l oad, or a null message if the timer expires.

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18. Turn on RTS (to switch TSC Softmodem modem to transmit mode)

SMS Applications continued

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. (Assuming DLL_SMS_ACK0 was received above) Wait per SMS timing and DCD turn off (SM-SC switched to receive mode)

25. Turn on RTS (to switch TSC Softmodem modem to transmit mode)

26. Wait for CTS on

27. Transmit DLL_SMS_REL message to end session

28. Turn off RTS (to switch TSC Softmodem modem to receive mode)

29. Wait for DCD on

30. Detect DLL_SMS_ACK1 message from SM-SC acknowledging the end of the session.

END

Case 2: SM-SC to TE transmission of a SMS

1. Set the Local Host serial data rate to 1200bps

2. The Local Host controls the V23 carrier with RTS signal

3. Turn off RTS (to prevent sending carrier too early)

4. ATY0B10C2S73-32S10=255S0=2 (Auto answer on 2 rings)

5. Modem auto answer SMS-SC call after S0 rings

6. Modem will display "Connect 1200" with CTS off and DC D off

7. Turn on RTS (to switch modem to transmit mode)

8. Wait for CTS on

9. Prepare to send the DLL_SMS_EST signal from the SM-TE. F rom the Local Host send the “+++ATS60=3” escape sequence to mod em to switch to the on-line command mode along with the ATS60=3 command to set the modem to transmit alternating 0/1s

10. Wait for 240 ms and then the ATO command to turn off the alternating pattern and start to transmit a MARK signal for 70ms.

11. Turn off RTS (to switch TSC Softmodem modem to receive mode)

12. After completion of the Channel Seizure & MARK signal transmission, from the Local Host send ATS60=0O to return to the data m ode

13. Wait for DCD on

14. Receive DLL_SMS_INFO_MT message from SM-SC (SM message information) There may be multiple messages and ACKn’s if segmented messages are sent.

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UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide

15. Wait per SMS timing and DCD turn off (SM-SC switched to receive mode)

reason for this using the test pattern generator for the alternating pattern is that the modem

no data).

chances for errors increase.

SMS Applications continued

16. Turn on RTS (to switch modem to transmit mode)

17. Wait for CTS on

18. Transmit DLL_SMS_ACK1 message to SM-SC

19. Turn off RTS (to switch modem to receive mode)

20. Wait for DCD on

21. Receive DLL_SMS_REL message from SM-SC

22. Wait per SMS timing and DCD turn off (SM-SC switched to receive mode)

23. Turn on RTS (to switch modem to transmit mode)

24. Wait for CTS on

25. Transmit DLL_SMS_ACK0 message to SM-SC acknowledging the end of the session

END A couple of things should be noted in the procedures above. Although detailed only in the

SM_SC to SM-TE connection, the TSC Softmodem is put into a mode t hat sends patterns during the handshake to generate the alternat i ng 0/1 and Marks (steps 9 and 10 above). This is also necessary every time the line is turned around and the carrier is sent. The

only sends asynchronous data and to send this by usi ng the equivalent character, “U”, there can be some distortion of the waveform. By using the transmit alternate pattern a symmetrical continuous waveform is guarant eed. The pattern transmission stops automatically when the modem is put back into the data mode. To send the Marking pattern simply do not send data for 70 ms (const ant marks are sent when there is If a normal frame were being sent instead of the DLL_SMS_EST signal, the Message Type, Message Length, Payload and Checksum would follow the Marks. This same procedure must be done each time a pattern is sent.

It may take some time to fully comprehend the SM S protocols, but after studying the ETSI documentation it will all start to fall into place. A ny robust half duplex protocol should contain a similar structure to SMS, but there is a lot of room for variation. It is important that enough time is allowed for the carriers to turn around and there should be a way to easily recognize the beginning of the data packets. If these functions are missing, the

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3 S-Register Index

S0 Auto Answer 21 S1 Ring Count 21 S10 Lost Carrier Hang Up Delay 23 S105 Pre Call attempt delay 40 S106 Delay between 1 S107 Delay between N S108 Maximum successive failed attempts 40 S109 Delay between series 41 S11 DTMF Ton/Toff Dialing Speed 24 S110 Line-In-Use Configuration register 44 S111 Line-In-Use Settle time 45 S112 Line-In-Use Energy detection Wait 45 S113 Line-In-Use Energy Detection Threshold 45 S114 Maximum carrier detect threshold (High Byte) 53 S114 Maximum carrier detect threshold (Low B yte) 53 S116 Parallel Pick Up Energy detection 46 S117 Inactivity Timeout 39 S12 DTMF / Twist Dial Register 25 S13 DTMF-Data / Transmit Attenuation 26 S14 General Modem Status Register 1 46 S15 Calling Tone Off Time 36 S16 Calling Tone On Time 36 S17 Ring / Minimum Frequency Detection 41 S18 Ring / Maximum Frequency Detection 42 S19 Precise Call Progress Selection 34 S2 Escape Code Character 21 S20 Call Progress Selection 33 S21 General Modem Status Register 2 47 S22 General Modem Status Register 3 48 S23 Busy Detection Cadence Cycle Count 32 S25 Protocol Selection 38 S26 Data Mode Control Register 48 S27 Call Progress Transmit Register 49 S28 Fast Connect Status and Calling Tone Enable Register 50 S29 Extended Result Code/ Cadence Stat us 29 S3 Carriage Return Character 21 S30 Data Modulation Selection 36 S31 Data Modulation Status 37 S32 Pulse Dial Make Time 27 S33 Pulse Dial Break Time 27 S34 Pulse Dial Interdigit Time 27 S35 Dial Tone / Cadence A Minimum On Time 30 S36 Dial Tone / Cadence A Maximum On Time 30 S37 Dial Tone / Cadence A Minimum Off Ti m e 31 S38 Dial Tone / Cadence A Maximum Off Time 31 S39 Dial Tone / Cadence B Minimum On Time 31 S4 Line Feed Character 22 S40 Dial Tone / Cadence B Maximum On Time 31 S41 Dial Tone / Cadence B Minimum Off Ti m e 31 S42 Dial Tone / Cadence B Maximum Off Time 31 S43 Busy Tone / Cadence A Minimum On Time 32 S44 Busy Tone / Cadence A Maximum On Time 32 S45 Busy Tone / Cadence A Minimum Off Tim e 32 S46 Busy Tone / Cadence A Maximum Off Ti m e 32 S47 Busy Tone / Cadence B Minimum On Time 32 S48 Busy Tone / Cadence B Maximum On Time 33

and 2nd attempt 40

and N+1th attempt 40

66 Rev. 1.5

UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide S49 Busy Tone / Cadence B Minimum Off Time 33

S5 Backspace Character 22 S50 Busy Tone / Cadence B Maximum Off Ti m e 33 S51 Ring / Cadence A Minimum On Time 42 S52 Ring / Cadence A Maximum On Time 42 S53 Ring / Cadence A Minimum Off Time 42 S54 Ring / Cadence A Maximum Off Time 42 S55 Ring / Cadence B Minimum On Time 42 S56 Ring / Cadence B Maximum On Time 43 S57 Ring / Cadence B Minimum Off Time 43 S58 Ring / Cadence B Maximum Off Time 43 S6 Wait Before Blind Dial 22 S60 Test Control Register 50 S61 Signal detect Register 1 51 S62 Signal detect Register 2 51 S63 Precise Call Progress Detect 34 S65 DTMF Detect Register 52 S66 Dial Tone / Wait For Dial Tone Time 30 S67 Dial Tone / Qualify Dial Tone Time 30 S68 Test Timer 52 S69 Test Error Count 53 S7 Wait For Carrier After Dial 22 S72 Pulse Map \ CID control \ Black Listi ng cont rol 27 S74 Billing Delay Time 43, 44 S75 Pre Dial Call Progress Imprecise Detect Level 35 S76 Post Dial Call Progress Imprecise Detect Level 35 S77 Pre Dial Call Progress Precise Detect Lev el 35 S78 Post Dial Call Progress Precise Detect Level 36 S79 FSK Originate Carrier Detect Level 37, 38 S8 Pause Time For Comma 23 S80 FSK Answer Carrier Detect Level 38 S81 PSK Originate Carrier Detect Level 38 S82 PSK Answer Carrier Detect Level 39 S83 QAM Originate Carrier Detect Level 39 S84 QAM Answer Carrier Detect Level 39 S85 DTMF – DAC transmit level coefficient 26 S86 Flash (!) / On Time 28 S87 Flash (!) / Off Time 28 S88 Imprecise Filter Selection 33 S89 Parallel Pick-up Energy Detection 44 S9 Carrier Detect Response Time 23 S90 RTS to CTS Turnaround Delay 53 S92 Status Register 4 28 S95 Caller ID configuration 43 S99 Pre Set Country Selection 24

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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.22BIS Linux Softmodem for 73M1822/73M1922 MicroDAA User Guide (this document) Evaluation System with Linux Softmodem for 73M1x22 MicroDAA User Guide

5 Contact Information

For more information about Teridian Semiconductor products or to check the availability of the 73M 1822 or 73M1922, contact us at:

6440 Oak Canyon Road Suite 100 Irvine, CA 92618-5201

Telephone: (714) 508-8800 FAX: (714) 508-8878 Email: modem.support@teridian.com

For a complete list of worldwide sales offices, go to http://www.teridian.com.

68 Rev. 1.5

Maxim Integrated 73M1822, 73M1922 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Country support

Originate functions

Dialing functions

Call progress functions

Data functions

Black Listing function

Answering functions

Caller ID functions

Line In Use and Parallel Pick Up detection functions