Ositech comm Trumpcard Data/Fax Modem manual Tn T est and Diagnostic

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Section Four

&Tn — T est and Diagnostic

Parameters

0, 1, or 3 through 8

Default4

Selects the test command. Test commands must be initiated in the command mode with asynchronous operation in the Direct mode selected (&Q0) at a speed of less than 14400 or 28800 (28800 version only).

A telco line connection must be established prior to initiating digital loopback tests. If these conditions are not met, the modem issues the ERROR result code. If local analog loopback is initiated while the modem is connected, the modem disconnects before performing the test.

An initiated test is active for a period of time specified by register S18 (test timer) before returning to the command mode. If S18 is zero, the test aborts when the user issues the &T0 command.

Examples

AT&T0	End test in progress. The escape sequence (+++)
	must be issued to return the modem to the
	command mode prior to sending this command.
	Subsequent issuing of the O command while in the
	command mode will cause the local and remote
	modems to return to normal data mode operation if
	the interrupted test was digital loopback.
AT&T1	Initiates local analog loopback. This test verifies the
	working condition of the path between the local
	communications software and the local modem. The
	characters received from the communications
	software are looped back by the modem.
AT&T3	Initiates remote digital loopback locally. The
	characters received from the remote modem are
	looped back to the remote modem by the local
	modem. This test verifies the working condition of
	the path from a remote modem, through a local
	modem, and back to the remote modem.
AT&T4	Allows the modem to respond to a request from a
	remote modem for a remote digital loopback test.
AT&T5	Prohibits the modem from granting a request from a
	remote modem for a digital loopback test.

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Trumpcard 14400/28800 Modem

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Contents Trumpcard Data/Fax Modem User’s Guide and ReferenceFTP How To Contact UsCopyright Preface FCC Notice Regulations Governing the Use of Modems Page Vii Contents Modem Command Reference Page Introduction Features Data ModeFacsimile Mode Cellular ModeUnique Features 32bis Industry Standards22bis 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 DiallingConnection Messages Re-Dialling the Last NumberStoring a Number 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 Answer Modem Command DescriptionsRe-execute 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 ATH1Mn Speaker Control IdentificationOlume Nn Automode Detection On Return To The On-Line StateSet Pulse Dial as Default Qn Result Code DisplaySn Read/Write S Registers ATQ0Wn Connect Message Control Set Tone Dial as DefaultVn Result Code Form Xn Extended Result Codes Result Codes Q0, V1, Wn, S95 Carrier Connect Cn DCD Option Zn ResetYn Control Long Space Disconnect None Restore Factory ConfigurationDn DTR Option Kn DTE/Modem Flow Control Gn Set Guard ToneJn T elephone Jack Selection 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\K5 AT\K1AT\K3 \Nn Operation Mode Control Cn Compression ControlReport Line Signal Quality En Enable/Disable Line Quality MonitorReport Received Signal Level Hn Link Negotiation Speed Kn MNP Extended ServicesMn T ransmit Level Adjustment for Cellular Connection @Mn Initial Cellular Power Level En Compromise EqualizerInit string Event Based Command Init string = NullModem Register Summary Default Register SettingsModem S Registers 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 TimerS36 Lapm Failure Control S32 XON CharacterS33 Xoff Character 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 Class 2 Commands Facsimile CommandsClass 1 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 ROM Checksum Test Testing Modem MemoryProduct Information