Ositech comm Trumpcard Data/Fax Modem manual Remote Digital Loopback with Self- Generated Pattern

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Section Five

Remote Digital Loopback with Self- Generated Pattern

This procedure tests the remote Modem port, the telephone line, the local serial and Modem ports. The test is only functional when the Modem is in direct mode (&Q0) and the COM port baud rate is set to 14400 bps (Trumpcard 14400) / 28800 bps (Trumpcard 28800) or less.

This test is similar to the Remote Digital Loopback test.

In this test, the local Modem sends the remote Modem a special test data sequence and the remote Modem echoes the data back. The local Modem examines the returned data and establishes an error count each time a mismatch is detected.

To run this test:

1.Establish a connection with a remote Modem.

2.Enter AT&T4 [ENTER] to ensure that the remote operator has set the Modem to accept a Remote Digital Loopback request.

3.Enter AT&T7 [ENTER] to initiate the remote digital loopback test. The Modem will send a test pattern to the remote Modem.

4.Enter AT&T0 [ENTER] to end the test. The Modem will return a three- digit number showing the test results. If the result is 000, the local and remote modems, and the telephone line have passed the test.

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Trumpcard 14400/28800 Modem

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Contents Trumpcard Data/Fax Modem User’s Guide and ReferenceHow To Contact Us CopyrightFTP Preface FCC Notice Regulations Governing the Use of Modems Page Vii Contents Modem Command Reference Page Introduction Features Data ModeFacsimile Mode Cellular ModeUnique Features Industry Standards 22bis32bis 42bis MNP 2, 3,MNP 27terHardware Installation Preparing for InstallationInstalling the Trumpcard Modem Pcmcia Modem Adapter connector is keyed to go in one way Line Interface Module Connection to Telephone Network Basic Modem Operation Before You Begin Enabling The TrumpcardUsing AT Commands Operating the TrumpcardMaking an Outgoing Call Tone or Pulse DiallingRe-Dialling the Last Number Storing a NumberConnection Messages Connect 1200TX/75RX FAXData CarrierSetting Up for a Non-Error Correcting Connection Ending Your ConnectionSetting up for a Cellular Connection Receiving an Incoming CallModem Configurations for Cellular Operation Cellular Phone Configuration Cellular Call Status Section Four Trumpcard 14400/28800 Modem Modem Command Reference Modem Command Guidelines Modem Command Reference Modem Command Summary +MSModem Command Reference Modem Command Descriptions Re-executeAnswer Bn Set ITU-T or Bell Mode Dn DialATB0 ATB1ATDS=2 En Command Echo Fn Select Line Modulation 14400 only+Ms Select Line Modulation 28800 only Sub-parameter DefinitionsHn Switch-Hook Control VFCATH0 ATH1Identification OlumeMn Speaker Control Nn Automode Detection On Return To The On-Line StateSet Pulse Dial as Default Qn Result Code DisplaySn Read/Write S Registers ATQ0Set Tone Dial as Default Vn Result Code FormWn Connect Message Control Xn Extended Result Codes Result Codes Q0, V1, Wn, S95 Carrier Connect Zn Reset Yn Control Long Space DisconnectCn DCD Option Restore Factory Configuration Dn DTR OptionNone Gn Set Guard Tone Jn T elephone Jack SelectionKn DTE/Modem Flow Control Mn Communication Mode Pn Dial Pulse Ratio disabled for the U.SQn Communication Mode Ln Line TypeRn RTS/CTS Option Sn DSR OptionTn T est and Diagnostic View Configuration and User Profiles AT&T6AT&T7 AT&T8Yn Designate Default User Profile Wn Store User ProfileZn=x Store Phone Number \Bn T ransmit Break\Gn Modem-to-Modem Flow Control \Kn Break ControlAT\K1 AT\K3AT\K5 \Nn Operation Mode Control Cn Compression ControlEn Enable/Disable Line Quality Monitor Report Received Signal LevelReport Line Signal Quality Kn MNP Extended Services Mn T ransmit Level Adjustment for Cellular ConnectionHn Link Negotiation Speed @Mn Initial Cellular Power Level En Compromise EqualizerInit string Event Based Command Init string = NullDefault Register Settings Modem S RegistersModem Register Summary Modem Command Reference S95 Extended Result Codes Register Descriptions S5 Backspace Character S6 WaitS7 Wait For Carrier After Dial S8 PauseS10 Lost Carrier To Hang Up Delay S9 Carrier Detect Response TimeS11 Dtmf T one Duration S12 Escape Code Guard TimeS18 Test Timer S24 Sleep Inactivity TimerS25 Delay to DTR S30 Inactivity TimerS32 XON Character S33 Xoff CharacterS36 Lapm Failure Control Range Default S37 Desired Telco Line SpeedS38 Delay Before Forced Disconnect S46 Protocol SelectionS48 V .42 Negotiation Action S86 Connection Failure Cause CodeS95 Extended Result Codes Facsimile Commands Class 1 CommandsClass 2 Commands Modem Test Procedures Local Modem Self-Test Local Analog Loopback Local Analog Loopback with Self- Generated Pattern Remote Digital Loopback Remote Digital Loopback with Self- Generated Pattern Local Digital Loopback Testing Modem Memory Product InformationROM Checksum Test