USRobotics x2/56K Modem, Connects itself, Correctly to, Remote modem, but, Connection is, Be made

Page 28

The modem

Someone probably hung up from another

connects itself

extension.

correctly to the

The modem detected a call waiting signal

remote modem, but

on the line. Contact the local tele-

the connection is

communications agency to find out how

interrupted during

to turn this signal off when you use the

communications

modem.

with the message:

 

NO CARRIER.

Try calling another modem to check if

 

the problem is general or unique to one

 

specific modem.

 

The telephone line is of low quality; try

 

communicating at a lower speed.

 

 

Connection problem

Some older modem models will not

with a 2400 bps

connect when the error correction protocol

modem.

is on. Turn this protocol off with the

 

following command:

 

0,66,1*￿&200$1'

 

 

High speed data

Check if there are any time-share

transmission failed.

applications or programs working in

 

parallel to the communications application.

 

The quality of the telephone line is too

 

low to withstand high-speed data transfer;

 

decrease the modem's transmission

 

speed.

 

 

International

Because of the length of the number

connections cannot

dialed and the differences in telephone

be made.

networks, it may be the case that some

 

digits do not get interpreted during the

 

dialing process. Insert commas between

 

parts of the dialing number in order to

 

create pauses.

 

For example, if you are calling 123456789,

 

insert commas and dial 1,23,456789

 

instead.

 

 

Calls to foreign

Increase the amount of time to wait for

countries terminate

a carrier signal. In terminal mode, type

with a ‘NO CARRIER’

ATS7=60 and press the Enter key. The

message.

range of acceptable values is country-

 

dependent.

24 Sportster Winmodem 33600 & x2/56K - User's manual

Image 28
Contents User’s Manual 1997 Table of Contents Appendix B Technical Specifications Glossary Limited WarrantyVoice Functions Appendix a Technical ReferenceIntroduction How a Modem WorksHow Does Your Sportster Winmodem 33600 & x2/56K∗ Work ? QuicklyOther Features AccuratelyEfficiently With WindowsPackage Contents Sportster Winmodem 33600 & x2/56K Installation InstallationPlug and Play Installation Procedure Insert the Modem Into the ComputerPlug in the power plug and turn the computer on Run the Modem’s Installation Program If you choose Then try This COM port This IRQ Running the Installation Program on a Windows 95 System Installing the Communications Software Page Changing Country Setup under Windows Page Using the Modem Installation TestFactory Settings Resetting the Modem to Factory Settings Remarks on Using the Modem Remember the Following Points When Using the ModemUn-Installing the Modem Page Problems and Solutions TroubleshootingSymptom Solution Send AT commands Modem does notRespond when, Terminal mode, youTone when you try to Using a certainErrors There is no audibleConnection problem ModemConnects itself Correctly toTransmission errors A fax, errors alterIntercontinental Connections areBefore the Modems Connect Signals but fail to If your PC reacts asThough you are Online, but no callLink. During Data Transfers If your screen displays random or garbage charactersDuring Fax Transmissions If You Are Still Having Problems Page Voice Functions Overview of Voice FunctionsApplication Settings SpeakerphoneImplementing Voice Functions Voice ApplicationsInput/Output Source Selection Page Main AT commands Appendix a Technical ReferenceBasic Command Set E0 Echo OFF E1 Modem displays keyboard commands Ln Controls speaker volume internals only Fn Sets online local echo of transmitted data ON/OFFHn Controls ON/OFF hook Displays the following informationXn Sets result code displayed. Default is Vn Displays verbal/numeric result codesResult Codes Xn SettingFunctions Advanced Command Set Enables/disables data compression Sets Error Control ARQ 1200 bps and higherSets Guard Tone Sets Transmit DataTD flow controlWrites current configuration to Nvram templates Sets pulse rotary dial make/break ratioSets Receive Data RD hardware flow control Controls Data Set Ready DSR operationsReg Default Function RegistersSets the number of seconds the modem Page Bit Value Result Reg Default Function Reg Default Function Page Bit Bit 4 Bit ResultValue 128 Reserved Page Page Sportster Winmodem X2/56K Specifications Electrical power CE Mark SafetyElectromagnetic Compatibility Page Analog signals GlossaryAsynchronous transmission Baud rateBit BitsBps BufferData mode Digital signalsError correction DuplexFax mode FallbackFlow control Local EchoProtocol ParityRemote Echo Terminal mode Serial transmissionSynchronous transmission TerminalXON/XOFF Page Limited Warranty Advised of the Possibility of Such Damages Page 024.1388-00