Bell 103/113, 300 bps, Fax Carrier | Multi-Tech Systems MT2834MR6

Chapter 1 - Introduction

Carrier Frequencies:	Transmit originate:	1270	Hz mark
Bell 103/113		1070	Hz space
(300 bps)	Receive originate:	2225	Hz mark
		2025	Hz space
	Transmit answer:	2225	Hz mark
		2025	Hz space
	Receive answer:	1270	Hz mark
		1070	Hz space
Carrier Frequencies:	Transmit originate:	980	Hz mark
V.21		1180	Hz space
	Receive originate:	1650	Hz mark
		1850	Hz space
	Transmit answer:	1650	Hz mark
		1850	Hz space
	Receive answer:	980 Hz mark
		1180	Hz space
Carrier Frequencies:	Transmit originate:	390	Hz mark
V.23		450 Hz space
	Receive originate:	1300	Hz mark
		2100	Hz space
	Transmit answer:	1300	Hz mark
		2100	Hz space
	Receive answer:	390Hz mark
		450Hz space
Fax Modulations	V.21Ch2 FSK at 300 bps
	V.27ter DPSK at 4800 and 2400 bps
	V.29 QAM at 9600 and 7200 bps
	V.17 TCM at 14400, 12000, 9600, and 7200 bps
Fax Carrier	V.21 CH2 (half duplex)
Frequencies	1650 Hz mark, 1850 Hz space for transmit originate
	1650 Hz mark, 1850 Hz space for transmit answer
	V.27ter: 1800 Hz Originate/Answer
	V.29 QAM: 1700 Hz Originate/Answer
	V.17 TCM: 1800 Hz Originate/Answer
Transmit Level	-13 dBm
Frequency Stability	+0.01%
Receiver Sensitivity	-43 dBm under worst case conditions
AGC Dynamic	43 dB
Range
Serial Interface	EIA RS-232C
Diagnostics	Power-on self-test; ITU-T V.54 local analog loop, local digital loop, remote digital
	loop.

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Multi-Tech Systems MT2834MR6 manual Bell 103/113, 300 bps, Fax Carrier, Frequencies, Transmit Level, Frequency Stability

Contents

User Guide Trademarks Revision Date Description Contents Registers Warranty & Service Index 116 Introduction Manual Organization Introduction Description FCC Regulations for Telephone Line Interconnection FCC Fax Update Canadian Limitations Notice Technical Specifications Bell 103/113 Diagnostics300 bps Fax Carrier Power Supply Busy Switch Modem LED IndicatorsSpeed Data Rate bps LED State Safety Warnings 10 MT2834MR6 Installation Notes Dialing and Answering Dial-Up Handshaking Details Dial-Up Automatic Answering Call Termination AT Commands Modes of Operation Working with AT Commands Command Editing Command Structure AT Commands Flow control disabled Baud adjustModem baud rate Serial port baud rate Alternate out-of-band escape sequence Force answer modeEscape sequence selection Go back online Default none Dialing CommandsDial = phone number Default P Dial Modifier CommandsDefault R0 Pulse or Tone Dialing Or 4 through 255 seconds International models ATDT1028806127853500 $123456789 NdNe Number Linking = 0 or = 1 or Default none Phone Number Memory Commands P9,T14089876543 T14082345678 Default &W1 Configuration Storage and Recall CommandsDefault &F8 = 0, 8, or ATZ AT&W1 defaultAT&F8&W0 AT&F9&W0 Modem Response Result Code Commands Default &A0 DefaultResult Codes and Call Progress Selection #An Auto Speed Detection Default #A0 Online Connection CommandsDefault B0 DCn AT Command Control = 0 or Default %DC0 DTn Dtmf Detection = 0 or Default DT0 CDn Cleardown at Disconnect = 0 or Default &CD0#Fn Fallback Modes = 0, 1, or Default #F2 Default *H0 Default &G0 models outside U.KDefault &P0 Models outside U.K G2 U.K. models only #T1 enables TCM #T0 disables TCMDefault Y0 Issued V.34 Commands Default &C1 RS-232 Interface CommandsDefault &D2 Default &R1 Go high again Default &S1S0 forces DSR high S1 allows DSR to act normally, that is, to follow CD Default &E1 Error Correction and Data Compression CommandsDefault &E15 #Ln Error Correction Modes Default #L0 $An Autoreliable Buffering = 0 or Default $A0 $En Error Correction at 300 bps = 0 or Default $E0$Rn Retransmit Count = 0 or Default $R0 Speed Conversion Commands $SB300 $SBn Serial Port Baud Rate = speed Default $SB57600$SB1200 $SB2400 Immediate Action Commands Rate Renegotiation BSn Maximum Reliable Block Size = 0 or Default &BS1 Flow Control Commands$EBn Asynchronous Word Length = 0 or Default $EB0 Flow Control Disable Default &E8 Default &E6Non-Error Correction Mode Flow Control Default &E10 #Xn Number of Xoff Characters Sent = 0 or Default #X0 Default &E13Pacing Computer-Initiated Flow Control = 12 or Escape Sequences Atcr Remote Configuration Escape Sequence Remote Configuration Commands Line Probe Commands Diagnostic Commands Registers Registers Default 10 J Default 13 MDefault 8 H Return Character Default 45 North America and International Time for Carrier Abort TimerUnit 1 second Range 1-255 U.S.A Maximum S11 value is 255 ms 255 units Registers Registers Examples of Assigning Values Reading and Assigning S-Register ValuesExamples of Reading 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 MNP Classes Data Compression 1 #L0 Command V.42 Mode Select Command #L2 #L1 Command 3 #L2 Command Reliable Mode &E2 Non-Error Correction Mode &E0Autoreliable Mode &E1 Modes of Operation Flow control and pacing Flow Control 1 XON/XOFF Flow Control &E5 Modem-Initiated Flow ControlHardware Flow Control &E4 Pacing &E13 Non-Error Correction Mode Flow Control &E10 and &E111 XON/XOFF Pass-Through &E7 Hewlett Packard ENQ/ACK Pacing &E9 Non-Error Correction Mode Flow Control 10.1 V.42 Error Correction ModesModem-Initiated Flow Control 10.3 XON/XOFF Pass-Through LAP-M Error Correction MNP Error CorrectionResult Codes Speed Conversion Modem Baud Rate $MB Baud Adjust $BA Serial Port Baud Rate $SB Autoreliable Buffering $A Related CommandsMaximum Block Size &BS Autoreliable Fallback Character $F Summary 13.5 V.42 Error Correction at 300 bps $ERetransmit Count $R Testing & Troubleshooting Testing and Troubleshooting Local Analog Loopback Test V.54 Loop Test Procedure Remote digital loopback test Remote Digital Loopback Test V.54 Loop Local digital loopback test Local Digital Loopback Test V.54 Loop Warranty & Service Warranty Multi-Tech Systems, Inc. Warranty & Repairs Policies2 U.S. and Canadian Customers International Distributors International Customers outside U.S.A. and Canada Repair Procedures for International Customers Repair Procedures for U.S. and Canadian CustomersRepairs Internet Site Technical SupportCountry Telephone Appendices Appendix a Ascii Conversion Chart Dial Pulses Appendix B Figure B-2. Standard Dtmf frequencies Tone Dial Frequencies Result Code Summary Appendix C Standard AT Result Codes &Q1 Appendix D Register Unit Range Default DescriptionRegister Summary S34 Command Values Description AT Command SummaryAppendix E CDn 100 101 102 103 104 105 Signal Information Negative Positive RS-232C Interface SpecificationsAppendix F Transmitted Data TD Pin 2 To modem Functional Description of the RS-232C Signals Test Voltage +V Pin From modem External Transmit Clock XTC Pin To modem Appendix G Cable and Connector Diagrams Introduction to MultiTech Escape Methods Appendix H Escape Method 1 +++ATCR How to Select an Escape Method Aborting an Escape Sequence Registers and Escape Sequence Basic Procedure Introduction to Remote ConfigurationSetup Changing the Remote Escape Character Changing the Passwords Index Index 118 119 120 121 122 S000326A