User Guide
Page 7
... 92870, U.S.A. U-90E Data/Fax Modem Customer Support If you have questions about your ZyXEL product or desire assistance, contact ZyXEL Communications Corporation offices worldwide, in one of the following ways: Method International North America E-Mail-Tech Support support@zyxel.com.tw support@zyxel.co.at (Europe) support@zyxel.com E-Mail-Sales sales@zyxel.com.tw sales@zyxel.com Web Site www.zyxel.com www.zyxel.com Phone +886...
... 92870, U.S.A. U-90E Data/Fax Modem Customer Support If you have questions about your ZyXEL product or desire assistance, contact ZyXEL Communications Corporation offices worldwide, in one of the following ways: Method International North America E-Mail-Tech Support support@zyxel.com.tw support@zyxel.co.at (Europe) support@zyxel.com E-Mail-Sales sales@zyxel.com.tw sales@zyxel.com Web Site www.zyxel.com www.zyxel.com Phone +886...
User Guide
Page 31
...only use the power adapter that is supplied with this unit. U-90E Data/Fax Modem • Telephone line from your modem to operate and could result in serious damage to the unit. Then connect the modem according to worry about. Modem Installation 2-5 Turn off the power on the back of the required... needed by using RS-232 to connect your modem to an AC power outlet. This adapter is factory pre-set. Your modem is rated for direct connection to your PC, please find the COM port on both the computer and the modem before making connections. Note: Before using ATZn command...
...only use the power adapter that is supplied with this unit. U-90E Data/Fax Modem • Telephone line from your modem to operate and could result in serious damage to the unit. Then connect the modem according to worry about. Modem Installation 2-5 Turn off the power on the back of the required... needed by using RS-232 to connect your modem to an AC power outlet. This adapter is factory pre-set. Your modem is rated for direct connection to your PC, please find the COM port on both the computer and the modem before making connections. Note: Before using ATZn command...
User Guide
Page 40
... as follows. Next, you will prompt you have done this test purpose, do not enter a phone number; The next window sets the COM port settings. U-90E Data/Fax Modem Once your modem is connected to your Hyper Terminal folder. After you for a name and Icon to your computer's serial port and telephone line, open the...
... as follows. Next, you will prompt you have done this test purpose, do not enter a phone number; The next window sets the COM port settings. U-90E Data/Fax Modem Once your modem is connected to your Hyper Terminal folder. After you for a name and Icon to your computer's serial port and telephone line, open the...
User Guide
Page 133
... COM port as a mouse or laser printer. Solutions 1. This section provides a list of you may encounter, followed by likely solutions. 15.1 AT Command Set Problems Problem Your modem does not respond to identify and resolve them. U-90E Data/Fax Modem Chapter 15 Troubleshooting Your modem ...is designed to execute AT commands. Check to see that you encountering problems using your communications or fax software. In the unlikely event...
... COM port as a mouse or laser printer. Solutions 1. This section provides a list of you may encounter, followed by likely solutions. 15.1 AT Command Set Problems Problem Your modem does not respond to identify and resolve them. U-90E Data/Fax Modem Chapter 15 Troubleshooting Your modem ...is designed to execute AT commands. Check to see that you encountering problems using your communications or fax software. In the unlikely event...
User Guide
Page 134
... state to view the currently active settings. Problem You typed an AT command, but did not receive an OK or 0 result code. U-90E Data/Fax Modem 2. The E0 and Q1 commands may be in data state instead of the command line. To enable echo and result codes, type AT ...3. Solution You may have typed a command that is not recognized by your modem. These characters must appear at the beginning of the command state. You may have typed the commands when your modem are addressing the same COM port. 2. Problem You receive the ERROR result code after typing an AT command...
... state to view the currently active settings. Problem You typed an AT command, but did not receive an OK or 0 result code. U-90E Data/Fax Modem 2. The E0 and Q1 commands may be in data state instead of the command line. To enable echo and result codes, type AT ...3. Solution You may have typed a command that is not recognized by your modem. These characters must appear at the beginning of the command state. You may have typed the commands when your modem are addressing the same COM port. 2. Problem You receive the ERROR result code after typing an AT command...
User Guide
Page 135
...Solutions 1. Neither your modem nor your communications software is using the same COM port as your communications software is configured to enable modem echo, or turn off your modem's LINE jack and not the PHONE jack. Use the E1 command to echo characters. U-90E Data/Fax Modem 15.2 Command Echo ...Problems Problem You do not see any typed characters on your software program's Echo (or duplex) feature. Make sure the DTR LED is connected to disable modem echo, or turn on your computer screen...
...Solutions 1. Neither your modem nor your communications software is using the same COM port as your communications software is configured to enable modem echo, or turn off your modem's LINE jack and not the PHONE jack. Use the E1 command to echo characters. U-90E Data/Fax Modem 15.2 Command Echo ...Problems Problem You do not see any typed characters on your software program's Echo (or duplex) feature. Make sure the DTR LED is connected to disable modem echo, or turn on your computer screen...
User Guide
Page 140
...final 2.0 standard. CD: See DCD. Currently several drafts exist which is framed by error control groups. COM port: Another name for fax transfers using a fax modem. U-90E Data/Fax Modem Carrier: The carrier is a modulated tone and is used in command mode. Compression: See data compression.... name for the ITU-TSS (ITU-T), the international standard making organization for a modem. CNG: Call negotiation tone. CRC: Cyclic redundancy check; ZyXEL modems use hardware flow control. ZyXEL modems support the draft PN-2388 of the RS-232C interface. The framing bits are...
...final 2.0 standard. CD: See DCD. Currently several drafts exist which is framed by error control groups. COM port: Another name for fax transfers using a fax modem. U-90E Data/Fax Modem Carrier: The carrier is a modulated tone and is used in command mode. Compression: See data compression.... name for the ITU-TSS (ITU-T), the international standard making organization for a modem. CNG: Call negotiation tone. CRC: Cyclic redundancy check; ZyXEL modems use hardware flow control. ZyXEL modems support the draft PN-2388 of the RS-232C interface. The framing bits are...