Multi-Tech Systems MT3334HD8 UnLoopback Test Modes

3 AT Commands

CommPlete Communications Server 43

UnLoopback Test Modes

= 0–3

Default: None

Loopback tests send data through the modem in such a way that it loops back to the terminal where it was

entered, testing all the circuits along the way. The U command selects from several loopback tests. See

Chapter 5, “Testing the MT3334HD8,” for more information.

ATU0 places the modem in originate mode for the local analog loopback test.

ATU1 places the modem in answer mode for the local analog loopback te st.

ATU2 performs the remote digital loopback test.

ATU3 performs the local digital loopback test.

Contents

Main Page Federal Communications Commission Statement FCC Regulations for Telephone Line Interconnection FCC Fax Warning Canadian Limitations Notice Table of Contents 1 Introduction 2 Installation 3 AT Commands 4 S-Registers Page Page MT3334HD8 User Guide LED Indicators CD OH Power Supplies Manual Organization Chapter 1 Introduction Page Technical Specifications Page Page Page Figure 1. MT3334HD8 modem card. Safety Warnings Pre-Installation Notes Installation Procedure Owners Manual both Page Page Working with AT Commands AT commands > % # Command Editing 14 CommPlete Communications Server Table 1. AT Commands by Function CommPlete Communications Server 15 Dialing Commands Ds Dial A: Continuous Redial Hn On-Hook/Off-Hook Dial Modifier Commands P, T Pulse or Tone Dialing W Wait for New Dial Tone Rn Reverse Originate/Answer Mode , Dialing Pause : Continuous Redial ; Return to Command Mode After Dialing ! Flash On-Hook Phone Number Memory Commands DsNd Store a Phone Number Nd Dial a Stored Number NdNe Number Linking e Configuration Storage and Recall Commands &Wn Store Configuration &Fn Load Default Configuration Table 2. Where the Modem Reads Configuration Parameters result codes Modem Response (Result Code) Commands En Echo Command Mode Characters Qn Result Codes Enable/Disable &Qn Result Codes (Multi-Tech or Standard AT) Vn Result Codes (Verbose/Terse) Xn Result Codes and Call Progress Selection &An Answerback NOT PROGRAMMED Online Connection Commands #An Auto Speed Detection BnAnswer Tone %DCnAT Command Control &CDnCleardown at Disconnect >DTnDTMF Detection #FnFallback Modes &GnGuard Tones *HnBusy-Out After Disconnect &PnSet Pulse-Dial Ratios &RDnSquare Wave Ring Detect $TnCalling Tone #TnTrellis-Coded Modulation MT3334HD8 User Guide YnLong Space Disconnect V.34 Commands %FnEcho Canceler Frequency Offset Compensation &RAnAsymmetric Bit Rate RS-232 Interface Commands &CnCarrier Detect Control &DnData Terminal Ready Control &RnClear to Send Control &SnData Set Ready Control &RFnCTS/RTS Interaction Control &SFnDSR/CD Interaction Control Error Correction and Data Compression Commands &EnError Correction Modes &EnData Compression #LnV.42 Error Correction Modes $EnV.42 Error Correction at 300 bps $AnAuto-Reliable Buffering $FnAuto-Reliable Fallback Character Enable/Disable $Rn Retransmit Count Speed Conversion Commands $BAnBaud Adjust $MBnModem Baud Rate $SBnSerial Port Baud Rate Immediate Action Commands A/ Repeat Last Command InInquire Product Code L5, L7 List Current Operating Parameters L6 List Current S-Register Values Flow Control Commands &BSnMaximum Reliable Block Size $EBnAsynchronous Word Length &E3 Flow Control Disable &E4 Hardware Flow Control &E5 XON/XOFF Flow Control &EnXON/XOFF Pass-Through &EnHewlett Packard ENQ/ACK Pacing &EnPacing (Computer-Initiated Flow Control) #XnNumber of XOFF Characters Sent Escape Sequences +++AT<CR> In-Band Escape Sequence OK H +++) Remote Configuration Commands xxxxxx AT %%% %%%AT<CR> Remote Configuration Escape Sequence Line Probe Commands %DPnRead Line Probe Data %DFnFormat Line Probe Data &RP Immediate Line Probe LnDisplay Line Probe Data Diagnostic Commands &TnRespond to Remote Digital Loopback Signal UnLoopback Test Modes Page Page S-Registers S0 Number of Rings Until Modem Answers S1 Ring Count S2 Escape Code Character S3 Return Character S4 Line Feed Character S5 Backspace Character S6 Wait Time for Dial Tone S7 Time for Carrier (Abort Timer) S8 Pause Time for Comma S9 Carrier Detect Response Time S10 Carrier Loss Disconnect Delay Time S11 Tone Dialing Spacing and Duration S13 Remote Configuration Escape Character S17 Changing Break Time S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD S25 DTR Dropout Time S30 Inactivity Timer S32 Time Lapse for Escape Sequence S34 Command Buffer Length After Online Escape Sequence S37 DTR Busy-In Time S43 Force V.34 Connect Speed S48 Maximum V.34 Connect Speed S94 Out-of-Service Time Reading and Assigning S-Register Values Examples of Assigning Values 1. Lets assume you want to have longer pauses caused by the comma in a dial command: five seconds Examples of Reading Values 1. To verify that you entered the value correctly in the preceding examples, type ATS8? and press Page Page Owner's Manual Local Analog Loopback Test (V.54 Loop 3) Figure 2. Local analog loopback test. 1. Connect the modem to your computer. Using your communication software, set the desired baud 2. Type ATU or ATU0 and press ENTER. This places your modem in analog loopback mode in the 5 Testing the MT 3334HD8 Remote Digital Loopback Test (V.54 Loop 2) Figure 3. Remote digital loopback test. U 5 Testing the MT 3334HD8 Local Digital Loopback Test (V.54 Loop 2) 5. Have someone enter data from the remote keyboard. For this test, typing multiple uppercase Figure 4. Local digital loopback test. 1. Open your communications software and go into terminal mode. Type AT and press ENTER; you 4. Type ATU3 and press ENTER. Once you receive an OK message from your modem (if responses are Page Page Limited Warranty Service Attn: Repair Technical Support Recording Product Information The Multi-Tech BBS Logging onto the Multi-Tech BBS L Downloading a File If you know the file name About CompuServe About the Internet About the Multi-Tech Fax-Back Service Upgrading the MT3334HD8 Firmware Using FlashPro to Upgrade Firmware Page Page 68 CommPlete Communications Server Appendix A ASCII Conversion Chart B Dial Pulses and Tones Appendix B Dial Pulses and Tones Dial Pulses 1 2 1 Figure B-2. Standard DTMF frequencies Figure B-3. Extended DTMF frequencies C Result Code Summary CommPlete Communications Server 71 Appendix C Result Code Summary is added to the CONNECT MNP Reliable Mode. If the modem connects using MNP error correction, the word RELIABLE Multi-Tech Result Codes (&Q0) or the letter R Standard AT Result Codes (&Q1) D S-Register Summary CommPlete Communications Server 73 Appendix D S-Register Summary 74 CommPlete Communications Server CommPlete Communications Server 75 Appendix E AT Command Summary 76 CommPlete Communications Server CommPlete Communications Server 77 78 CommPlete Communications Server CommPlete Communications Server 79 80 CommPlete Communications Server CommPlete Communications Server 81 82 CommPlete Communications Server CommPlete Communications Server 83 84 CommPlete Communications Server F Remote Configuration Appendix F Remote Configuration Basic Procedure 3. Enter the number 2. The remote modem responds with a request for the setup password: 4. Enter your setup password. If the password is correct, the remote modem responds with: 7. Type the number 1 to return to data mode. You can then break the connection in the normal way. Changing the Passwords Changing the Remote Escape Character Page A Index B C D E F G H I O P Q R S T U V W X