MaxTech V.42bis, V.32bis user manual Power 75 W

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Modem experiences errors while communicating with a remote modem.

1.Make sure the DTE speed is the same as the modem connec- tion speed when in Direct Mode (\N1 command in effect).

2.Make sure the remote system and your modem use the same communication parameters (i.e., baud rate, data bit length, parity, and stop bit).

3.Make sure RTS/CTS hardware flow control is enabled and XON/XOFF software flow control is disabled in the commu- nication software.

4.Make sure the data speed is not faster than your computer's capability. Most IBM compatibles are capable of 19,200 bps under DOS and Windows. Operating at higher speeds under Windows requires a faster CPU (386/486 or better).

Modem experiences bursts of errors or suddenly disconnects while communicating with a remote modem.

1.Make sure Call Waiting is turned off.

2.Make sure the phone line does not exhibit excess noise.

Modem exhibits poor voice record or playback.

1.Make sure the correct modem type is selected in the Voice/ FAX software. Use “ Cirrus Logic” or similar selection. Do not select “Rockwell or Rockwell ICS” configuration.

Section Seven

- Specifications

CCITT/Bell Std.

V.42bis, V.42, V.32bis, V.32, V.29,

 

V.27ter, V.22bis, V.22, V.21, V.17,

 

Bell212/103

MNP protocols:

MNP 5, 4, 3, 2

Host Interface:

8 bit PC bus

COM ports:

1, 2, 3, 4

IRQ lines:

2, 3, 4, 5

FAX Group:

Group III Send/Receive Standard

FAX Command set: EIA/TIA-578 Service Class 1

Voice Command set: Cirrus Logic

Escape Detection:

TIES Escape Sequence

Transmit level:

-12 dBm +/- 1 dB

Receiver Sensitivity: -40 dBm

UART:

16550 compatible

Data format:

300-57600 bps (8N1, 7E1,7E2,7O1,7O2)

Power:

0.75 W

16

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Contents Contents Hardware Installation Unpacking Your ModemSoftware Installation/Configuration Fasten the retaining bracketPage COM Port and Interrupt Settings Devices in your computer cannot share an IRQ withTesting Your Modem After Installation Using Your ModemWhere To Go From Here Executing CommandsCommand Structure Basic AT Commands Extended AT Commands Mode after DTR toggle Guard tone disabledForce DSR Signal High on Enable Trellis Coding @22bis auto-retrain disabled 22bis auto-retrain enabledEnable Auto Fall Forward/Back Disable Auto Fall Forward/BackFax Class 1 Commands Voice Mode Commands S Registers Function Range/units Default Basic Response Codes Modem does not respond to commands Modem does not dialModem dials but does not connect Modem makes a connection but no data appears on your screen High pitch tone is heard whenever you answer the phoneModem exhibits poor voice record or playback FCC Compliance UartFCC Class B Statement DOC Compliance InformationDisclaimer, Copyright, And Other Notices Section One Introduction Software Installation/Configuration COM Port and Interrupt Settings Switch Block SW-1 Location Switch Block Settings Testing Your Modem After Installation Bold text Command Function Manually answer incoming call Ccitt modeOriginate calls in answer mode With AT or follow with EnterCommands are not echoed Resets modem after DTR toggle Recall factory default configurationToggle Hz guard toneMNP/V.42/V.42bis Commands \A3\Q3 Switch to reliable link from normal link Register Function Range/units Default S RegistersSection Five Result Codes Section Six Troubleshooting Modem does not dial Power 75 W Section Eight Support and Service DOC Compliance Information Disclaimer, Copyright, And Other Notices