Diagnostic Commands | Multi-Tech Systems MT3334HD8 specs

MT3334HD8 User Guide

&RP Immediate Line Probe

Default: none

This immediate action command initiates a retrain that makes the processor read line probe information for display using the L9, L10, and L11 commands. It is valid only when online in V.34 mode. Before issuing the command, you must escape to command mode while remaining online. To combine both actions, use the following command string: +++AT&RP<CR>.

The modem will not read and store the line probe information from this retrain unless you first issue a %DP1 command

Ln Display Line Probe Data

n = 9–11 Default: none

These immediate action commands cause the modem to display line probe information when it is in V.34 mode. The line probe information must first be read and stored by the modem (see “Read Line Probe Data”). Data format is controlled by the Format Line Probe Data command, %DF.

The display commands are valid only in online mode. To use them online, you must first escape to command mode with +++AT<CR>. To return online, enter ATO.

ATL9 displays signal strength information.

ATL10 displays the signal to noise ratio (SNR).

ATL11 displays noise information.

Diagnostic Commands

The MT3334HD8 has two diagnostic commands and four diagnostic modes. The power-on self-test is activated every time power is applied. The U command selects a loopback test, while the &T command enables a modem to respond to a loopback test from another modem. See Chapter 5, “Testing the MT3334HD8,” for a fuller discussion. Refer to the L8 command to see how to list the diagnostic online status.

&Tn Respond to Remote Digital Loopback Signal

n = 4 or 5 Default: &T5

The &T command enables or disables the modem’s ability to recognize the remote digital loopback (RDL) test signal. (See Chapter 5 for remote digital loopback test procedures.)

AT&T4 lets the modem respond to an RDL signal, and places it in digital loopback.

AT&T5 causes the modem to ignore the RDL signal.

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Multi-Tech Systems MT3334HD8 manual Diagnostic Commands, RP Immediate Line Probe, Ln Display Line Probe Data

Contents

MT3334HD8 Modem User Guide Multi-Tech Systems, Inc Woodale Drive Mounds View, Minnesota CommPlete Communications Server FCC Fax Warning Canadian Limitations Notice Table of Contents Testing the MT3334HD8 Warranty, Service, and Technical SupportAppendix D Appendix F Introduction LED Indicators Power SuppliesIntroduction Manual Organization Installation Technical Specifications Data Rates Modem Introduction 2400 & 1200 bps MT3334HD8 User Guide Power Installation Safety Warnings MT3334HD8 modem card Pre-Installation Notes Installation ProcedurePage AT Commands Working with AT Commands Command StructureModes of Operation Command Editing AT Commands by Function $BA Dialing Commands Dial Modifier CommandsDs Dial Continuous Redial Pulse or Tone Dialing Wait for New Dial Tone Rn Reverse Originate/Answer Mode Return to Command Mode After DialingDialing Pause Flash On-Hook Phone Number Memory Commands @ Quiet AnswerCall Card Tone Detect DsNd Store a Phone Number Configuration Storage and Recall Commands Wn Store ConfigurationNdNe Number Linking List Stored Telephone Numbers Modem Response Result Code Commands Fn Load Default ConfigurationReset Modem Echo Command Mode Characters Result Codes Verbose/Terse Online Connection Commands An Answerback#An Auto Speed Detection Bn Answer Tone DCn AT Command Control CDn Cleardown at DisconnectDTn Dtmf Detection #Fn Fallback Modes Gn Guard TonesHn Busy-Out After Disconnect Pn Set Pulse-Dial Ratios RDn Square Wave Ring Detect $Tn Calling Tone#Tn Trellis-Coded Modulation Commands Fn Echo Canceler Frequency Offset CompensationYn Long Space Disconnect RAn Asymmetric Bit Rate RS-232 Interface Commands Cn Carrier Detect ControlDn Data Terminal Ready Control Rn Clear to Send Control Sn Data Set Ready ControlRFn CTS/RTS Interaction Control SFn DSR/CD Interaction Control Error Correction and Data Compression Commands En Error Correction Modes#Ln V.42 Error Correction Modes En Data Compression $En V.42 Error Correction at 300 bps $Fn Auto-Reliable Fallback Character Enable/Disable$An Auto-Reliable Buffering Speed Conversion Commands $BAn Baud Adjust$Rn Retransmit Count $MBn Modem Baud Rate $SBn Serial Port Baud Rate Immediate Action Commands Repeat Last CommandInquire Product Code L5, L7 List Current Operating Parameters Flow Control Commands E3 Flow Control Disable En Non-Error Correction Mode Flow ControlE4 Hardware Flow Control E5 XON/XOFF Flow Control En Pacing Computer-Initiated Flow Control #Xn Number of Xoff Characters Sent Force Answer Mode Escape Sequences+++ATCR In-Band Escape Sequence Breakatcr Out-of-Band Escape Sequence Remote Configuration Commands Atcr Remote Configuration Escape Sequence#Ixxxxxx Change Login Password Go Back Online Line Probe Commands #Syyyyyy Change Setup PasswordDPn Read Line Probe Data DFn Format Line Probe Data Diagnostic Commands Tn Respond to Remote Digital Loopback SignalRP Immediate Line Probe Ln Display Line Probe Data Un Loopback Test Modes MT3334HD8 User Guide Registers Registers S0 Number of Rings Until Modem AnswersS1 Ring Count S2 Escape Code Character S7 Time for Carrier Abort Timer S4 Line Feed CharacterS5 Backspace Character S6 Wait Time for Dial Tone S10 Carrier Loss Disconnect Delay Time S13 Remote Configuration Escape CharacterS9 Carrier Detect Response Time S11 Tone Dialing Spacing and Duration S30 Inactivity Timer S34 Command Buffer Length After Online Escape SequenceS24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD S25 DTR Dropout Time S94 Out-of-Service Time S37 DTR Busy-In TimeS43 Force V.34 Connect Speed S48 Maximum V.34 Connect Speed AT Commands that Affect S-Registers Reading and Assigning S-Register ValuesExamples of Assigning Values Examples of Reading Values AT&E2$SP1#L3$R0$MB19200$SB115200$EB1S0=10&W0CR Testing the MT3334HD8 Test procedure Local Analog Loopback Test V.54 Loop Testing the MT3334HD8 Remote Digital Loopback Test V.54 Loop Dial the remote modem and establish your online connection Local Digital Loopback Test V.54 Loop Local digital loopback testPage Warranty, Service, and Technical Support Limited Warranty Service Technical Support Recording Product Information Multi-Tech BBS Logging onto the Multi-Tech BBSDownloading a File About CompuServe Reading a MessageLeaving a Message Bulletins About the Multi-Tech Fax-Back Service About the Internet Using FlashPro to Upgrade Firmware Upgrading the MT3334HD8 Firmware MT3334HD8 User Guide Appendixes Appendix a Ascii Conversion Chart Ctrl Code HEX DEC Appendix B Dial Pulses and Tones Dial PulsesTone Dial Frequencies Figure B-2. Standard Dtmf frequencies Appendix C Result Code Summary Multi-Tech Result Codes &Q0 Standard AT Result Codes &Q1 Register Unit Range Default Description Appendix D S-Register Summary Sets fixed V.34 connect speed = 28800 bps Appendix E AT Command Summary Return CDn AT Command Summary $Fn Command Values Description Command Values Description $MBn RAn Command Values Description SFn Command Values Description #Vn Breakatcr Appendix F Remote Configuration Basic ProcedureSetup Changing the Passwords Changing the Remote Escape Character Index MT3334HD8 User Guide Index Long space break Pacing, 36, 37, 38 enable/disable, 38 ENQ/ACK Commands Loopback tests, 42, 43, 54, 56 tone detection