Ositech comm Trumpcard Data/Fax Modem manual Local Digital Loopback

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Modem Test Procedures

Local Digital Loopback

This test is used to verify the communications link and the remote Modem, and 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.

To run this test:

1.Establish a connection with a remote Modem.

2.Enter AT&T3 [ENTER] to put the Modem into the local digital loopback mode.

3.Instruct the remote Modem operator to enter a message.

During this test the local Modem simply loops back any incoming data to the remote Modem. If the information sent and received by the remote Modem are identical, the test is successful.

4.Enter AT&T0 [ENTER] to end the test.

User’s Guide and Reference

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Contents User’s Guide and Reference Trumpcard Data/Fax ModemCopyright How To Contact UsFTP Preface FCC Notice Regulations Governing the Use of Modems Page Vii Contents Modem Command Reference Page Introduction Data Mode FeaturesCellular Mode Facsimile ModeUnique Features 22bis Industry Standards32bis MNP 2, 3, 42bisMNP 27terPreparing for Installation Hardware 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 Enabling The Trumpcard Before You BeginOperating the Trumpcard Using AT CommandsTone or Pulse Dialling Making an Outgoing CallStoring a Number Re-Dialling the Last NumberConnection Messages FAX Connect 1200TX/75RXData CarrierEnding Your Connection Setting Up for a Non-Error Correcting ConnectionReceiving an Incoming Call Setting up for a Cellular ConnectionModem 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 +MS Modem Command SummaryModem Command Reference Re-execute Modem Command DescriptionsAnswer Dn Dial Bn Set ITU-T or Bell ModeATB0 ATB1ATDS=2 Fn Select Line Modulation 14400 only En Command EchoSub-parameter Definitions +Ms Select Line Modulation 28800 onlyVFC Hn Switch-Hook ControlATH0 ATH1Olume IdentificationMn Speaker Control On Return To The On-Line State Nn Automode DetectionQn Result Code Display Set Pulse Dial as DefaultSn Read/Write S Registers ATQ0Vn Result Code Form Set Tone Dial as DefaultWn Connect Message Control Xn Extended Result Codes Result Codes Q0, V1, Wn, S95 Carrier Connect Yn Control Long Space Disconnect Zn ResetCn DCD Option Dn DTR Option Restore Factory ConfigurationNone Jn T elephone Jack Selection Gn Set Guard ToneKn DTE/Modem Flow Control Pn Dial Pulse Ratio disabled for the U.S Mn Communication ModeQn Communication Mode Ln Line TypeSn DSR Option Rn RTS/CTS OptionTn T est and Diagnostic AT&T6 View Configuration and User ProfilesAT&T7 AT&T8Wn Store User Profile Yn Designate Default User Profile\Bn T ransmit Break Zn=x Store Phone Number\Gn Modem-to-Modem Flow Control \Kn Break ControlAT\K3 AT\K1AT\K5 Cn Compression Control \Nn Operation Mode ControlReport Received Signal Level En Enable/Disable Line Quality MonitorReport Line Signal Quality Mn T ransmit Level Adjustment for Cellular Connection Kn MNP Extended ServicesHn Link Negotiation Speed En Compromise Equalizer @Mn Initial Cellular Power LevelInit string = Null Init string Event Based CommandModem S Registers Default Register SettingsModem Register Summary Modem Command Reference S95 Extended Result Codes Register Descriptions S6 Wait S5 Backspace CharacterS7 Wait For Carrier After Dial S8 PauseS9 Carrier Detect Response Time S10 Lost Carrier To Hang Up DelayS11 Dtmf T one Duration S12 Escape Code Guard TimeS24 Sleep Inactivity Timer S18 Test TimerS25 Delay to DTR S30 Inactivity TimerS33 Xoff Character S32 XON CharacterS36 Lapm Failure Control S37 Desired Telco Line Speed Range DefaultS46 Protocol Selection S38 Delay Before Forced DisconnectS86 Connection Failure Cause Code S48 V .42 Negotiation ActionS95 Extended Result Codes Class 1 Commands Facsimile 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 Product Information Testing Modem MemoryROM Checksum Test