Ositech comm Trumpcard Data/Fax Modem S38 Delay Before Forced Disconnect, S46 Protocol Selection

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Modem Command Reference

S38 — Delay Before Forced Disconnect

Range

0-255 seconds

Default20

This register specifies the delay between the modem's receipt of the Hangup (H) command to disconnect (or ON-to-OFF transition of /DTR if the modem is programmed to follow the signal) and the disconnect operation. For an error-correction connection, this register can be used to ensure that data in the modem buffer is sent before the modem disconnects. If S38 is set between 0 and 254, the modem will wait that number of seconds for the remote modem to acknowledge all data in the modem buffer before disconnecting. If time expires before all data is sent, the NO CARRIER result code will be issued to indicate that data has been lost. If all data is transmitted prior to timeout, the response to the H0 command will be OK. If S38 is set to 255, the modem data does not timeout, and continues to attempt to deliver data in the buffer until the connection is lost, or the data is delivered.

S46 — Protocol Selection

Range

136 or 138

Default136

Controls selection of compression.

The following actions are executed for the given values:

S46 = 136	Execute error correction protocol with no
	compression.
S46 = 138	Execute error correction protocol with compression.
	In addition to V.42bis, the modem also implements

MNP4 data compression. V.42bis is used only with

LAPM, and MNP5 only with MNP4.

User’s Guide and Reference

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Contents User’s Guide and Reference Trumpcard Data/Fax ModemHow To Contact Us CopyrightFTP Preface FCC Notice Regulations Governing the Use of Modems Page Vii Contents Modem Command Reference Page Introduction Data Mode FeaturesCellular Mode Facsimile ModeUnique Features Industry Standards 22bis32bis 27ter 42bisMNP 2, 3, MNPPreparing 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 CallRe-Dialling the Last Number Storing a NumberConnection Messages Carrier Connect 1200TX/75RXFAX DataEnding 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 Modem Command Descriptions Re-executeAnswer ATB1 Bn Set ITU-T or Bell ModeDn Dial ATB0ATDS=2 Fn Select Line Modulation 14400 only En Command EchoSub-parameter Definitions +Ms Select Line Modulation 28800 onlyATH1 Hn Switch-Hook ControlVFC ATH0Identification OlumeMn Speaker Control On Return To The On-Line State Nn Automode DetectionATQ0 Set Pulse Dial as DefaultQn Result Code Display Sn Read/Write S RegistersSet 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 Ln Line Type Mn Communication ModePn Dial Pulse Ratio disabled for the U.S Qn Communication ModeSn DSR Option Rn RTS/CTS OptionTn T est and Diagnostic AT&T8 View Configuration and User ProfilesAT&T6 AT&T7Wn Store User Profile Yn Designate Default User Profile\Kn Break Control Zn=x Store Phone Number\Bn T ransmit Break \Gn Modem-to-Modem Flow ControlAT\K1 AT\K3AT\K5 Cn Compression Control \Nn Operation Mode 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 En Compromise Equalizer @Mn Initial Cellular Power LevelInit string = Null Init string Event Based CommandDefault Register Settings Modem S RegistersModem Register Summary Modem Command Reference S95 Extended Result Codes Register Descriptions S8 Pause S5 Backspace CharacterS6 Wait S7 Wait For Carrier After DialS12 Escape Code Guard Time S10 Lost Carrier To Hang Up DelayS9 Carrier Detect Response Time S11 Dtmf T one DurationS30 Inactivity Timer S18 Test TimerS24 Sleep Inactivity Timer S25 Delay to DTRS32 XON Character S33 Xoff 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 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