Appendix B, Dial Pulses | Multi-Tech Systems MT2834MR6 specification

Appendix

Appendix B

Dial Pulses

When you pulse dial, as when you make a call with a rotary dial telephone, your telephone or modem generates codes in the form of pulses that simulate the opening and closing of old-fashioned electric relays, or switches. The number of pulses in a code are the same as the digit they encode; thus, the digit 1 is represented by one pulse, the digit 2 by two pulses, etc. In Figure B-1, the digit 2 is pulse dialed, followed by the digit 1. Each pulse consists of an A ms open (break) and a B ms closed (make), where A is either 60 or 67 ms, and B is either 40 or 33 ms, for a total of 100 ms per cycle, or a rate of 10 pulses per second. The interdigital pause time is 800 ms. The pulse ratios are controlled by the &P command.

Figure B-1. Dial pulses

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Multi-Tech Systems MT2834MR6 manual Appendix B, Dial Pulses

Contents

User Guide Revision Date Description Trademarks Contents Registers Warranty & Service Index 116 Introduction Introduction Manual Organization Description FCC Fax Update FCC Regulations for Telephone Line Interconnection Canadian Limitations Notice Technical Specifications Diagnostics Bell 103/113300 bps Fax Carrier Power Supply Modem LED Indicators Busy SwitchSpeed Data Rate bps LED State 10 MT2834MR6 Installation Notes Safety Warnings Dialing and Answering Dial-Up Automatic Answering Dial-Up Handshaking Details Call Termination AT Commands Working with AT Commands Modes of Operation Command Structure Command Editing AT Commands Baud adjust Flow control disabledModem baud rate Serial port baud rate Force answer mode Alternate out-of-band escape sequenceEscape sequence selection Go back online Dialing Commands Default noneDial = phone number Dial Modifier Commands Default PDefault R0 Pulse or Tone Dialing Or 4 through 255 seconds International models ATDT1028806127853500 $123456789 Phone Number Memory Commands NdNe Number Linking = 0 or = 1 or Default none T14082345678 P9,T14089876543 Configuration Storage and Recall Commands Default &W1Default &F8 = 0, 8, or AT&W1 default ATZAT&F8&W0 AT&F9&W0 Modem Response Result Code Commands Result Codes and Call Progress Selection DefaultDefault &A0 Online Connection Commands #An Auto Speed Detection Default #A0Default B0 DCn AT Command Control = 0 or Default %DC0 #Fn Fallback Modes = 0, 1, or Default #F2 CDn Cleardown at Disconnect = 0 or Default &CD0DTn Dtmf Detection = 0 or Default DT0 Default &G0 models outside U.K Default *H0Default &P0 Models outside U.K G2 U.K. models only #T0 disables TCM #T1 enables TCMDefault Y0 Issued V.34 Commands RS-232 Interface Commands Default &C1Default &D2 Default &R1 Default &S1 Go high againS0 forces DSR high S1 allows DSR to act normally, that is, to follow CD Error Correction and Data Compression Commands Default &E1Default &E15 #Ln Error Correction Modes Default #L0 $Rn Retransmit Count = 0 or Default $R0 $En Error Correction at 300 bps = 0 or Default $E0$An Autoreliable Buffering = 0 or Default $A0 Speed Conversion Commands $SBn Serial Port Baud Rate = speed Default $SB57600 $SB300$SB1200 $SB2400 Immediate Action Commands Rate Renegotiation Flow Control Commands BSn Maximum Reliable Block Size = 0 or Default &BS1$EBn Asynchronous Word Length = 0 or Default $EB0 Flow Control Disable Default &E6 Default &E8Non-Error Correction Mode Flow Control Default &E10 Default &E13 #Xn Number of Xoff Characters Sent = 0 or Default #X0Pacing Computer-Initiated Flow Control = 12 or Escape Sequences Remote Configuration Commands Atcr Remote Configuration Escape Sequence Line Probe Commands Diagnostic Commands Registers Registers Default 13 M Default 10 JDefault 8 H Return Character Time for Carrier Abort Timer Default 45 North America and InternationalUnit 1 second Range 1-255 U.S.A Maximum S11 value is 255 ms 255 units Registers Registers Examples of Reading Values Reading and Assigning S-Register ValuesExamples of Assigning Values AT Commands Affecting S-Registers Error Correction, Data Compression & Speed Conversion Error Correction, Data Compression, and Speed Conversion How V.42 Detects and Corrects Errors Data Compression MNP Classes V.42 Mode Select Command #L 1 #L0 Command2 #L1 Command 3 #L2 Command Non-Error Correction Mode &E0 Reliable Mode &E2Autoreliable Mode &E1 Modes of Operation Flow Control Flow control and pacing Hardware Flow Control &E4 Modem-Initiated Flow Control1 XON/XOFF Flow Control &E5 Non-Error Correction Mode Flow Control &E10 and &E11 Pacing &E131 XON/XOFF Pass-Through &E7 Hewlett Packard ENQ/ACK Pacing &E9 10.1 V.42 Error Correction Modes Non-Error Correction Mode Flow ControlModem-Initiated Flow Control 10.3 XON/XOFF Pass-Through MNP Error Correction LAP-M Error CorrectionResult Codes Speed Conversion Baud Adjust $BA Modem Baud Rate $MB Serial Port Baud Rate $SB Related Commands Autoreliable Buffering $AMaximum Block Size &BS Autoreliable Fallback Character $F Retransmit Count $R 13.5 V.42 Error Correction at 300 bps $ESummary Testing & Troubleshooting Testing and Troubleshooting Test Procedure Local Analog Loopback Test V.54 Loop Remote Digital Loopback Test V.54 Loop Remote digital loopback test Local Digital Loopback Test V.54 Loop Local digital loopback test Warranty & Service 2 U.S. and Canadian Customers Multi-Tech Systems, Inc. Warranty & Repairs PoliciesWarranty International Customers outside U.S.A. and Canada International Distributors Repairs Repair Procedures for U.S. and Canadian CustomersRepair Procedures for International Customers Country Telephone Technical SupportInternet Site Appendices Ascii Conversion Chart Appendix a Appendix B Dial Pulses Tone Dial Frequencies Figure B-2. Standard Dtmf frequencies Appendix C Result Code Summary Standard AT Result Codes &Q1 Register Summary Register Unit Range Default DescriptionAppendix D S34 Appendix E AT Command SummaryCommand Values Description CDn 100 101 102 103 104 105 Appendix F RS-232C Interface SpecificationsSignal Information Negative Positive Functional Description of the RS-232C Signals Transmitted Data TD Pin 2 To modem Test Voltage +V Pin From modem External Transmit Clock XTC Pin To modem Cable and Connector Diagrams Appendix G Appendix H Introduction to MultiTech Escape Methods How to Select an Escape Method Escape Method 1 +++ATCR Registers and Escape Sequence Aborting an Escape Sequence Setup Introduction to Remote ConfigurationBasic Procedure Changing the Passwords Changing the Remote Escape Character Index Index 118 119 120 121 122 S000326A