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Modemsharing Client Faxing issues

If faxing does not Work

If faxing does not work from the ModemServe Client computer, try verifying your installation with something simpler like HyperTerminal first.  If HyperTerminal is not functioning it would indicate there may be basic problems with your modem or dialing configuration, which needs to be solved before attempting to use fax.

If dialing out using HyperTerminal or DUN works but faxing fails

Make sure that the modem(s) supports Fax Class 2 or Class 2.0. Many of todays inexpensive "Windows Modems" (also known as Software Modems) only support fax Class 1 mode. Class 1 faxing will not work reliably over a network connection due to sensitive timing issues. When purchasing new modems for network modemsharing, make sure the model you get is not limited to fax Class 1 mode.

Also make sure that the fax software is configured for either Fax Class 2 or Class-2.0 mode.

Unfortunately the MS-Fax included with Windows 2000, XP, and 2003 is hardcoded to only support Class 1, so a third party faxing application is needed, such as WinFax, Mighty Fax, or BitFax. (Note: BitFax was discontinued, but was often bundled with modems purchased in the late 1990's and early 2000's). We highly recommend Mighty Fax as a simple and inexpensive solution if you don't need all the features found in WinFax.

Most Fax software (Including Winfax and Mighty Fax) defaults to using Fax Class 1 fax when installed, and it must be reconfigured for fax Class 2 or Class 2.0.

Enabling Fax Class 2 or 2.0 in Winfax:
From the WinFax Message Manager, click Tools > Setup, then click on "Modem and Communication Devices". Select the Modem name, and click on Properties. Then select "TAPI" as the port, and Under MODEM TYPE select "Class 2" or "Class 2.0" depending on which one your modem supports.

Enabling Fax Class 2 or 2.0 in Mighty Fax:
From the Mighty Fax console, click File > Set Preferences, then click on Modem and choose the proper Modem name from the pulldown list. (Selecting the modem name is recommended rather then choosing a COM port, so that TAPI is enabled). Next click on Sending and choose either "Class 2" or "Class 2.0" depending on which one your modem supports. For the Transfer Rate we recommend choosing 14400, but if your phone lines are noisy then you might need to choose 1200 or 9600. If you also plan to receive faxes you will also need to set the fax Class for this separatetly, by clicking on Receiving and selecting the same settings.

Keep in mind that Class 2 and Class 2.0 are NOT the same protocol, and you must configure the fax software based on which protocol is supported by the modem. 

BitFax does not require any configuration, as it automatically uses Class 2 or 2.0 if it detects your modem supports it.


How do I find out if my modem supports Class 2 or Class 2.0 faxing?

In some cases, especially for digital modems, only data calls are supported. You can verify which Fax class your modem supports by sending it the following command , which can be typed into a terminal program such as Hyperterminal:


Be sure to type enter after the command to send it.The modem reply will be in the form:


Where 0 is for data, 1 is for Class 1 fax, 1.0 is for Class 1.0 fax, 2 is for Class 2 fax, and 2.0 is for Class 2.0 fax. Some older data-only modems may report "OK" or "ERROR" instead.

If you are unfamiliar with how to type in AT commands to your terminal program, another method is to go to the modemsharing /Server computer and from the control panel, select "Phone and Modems" > Modem Tab, select the modem name, and click Properties> Diagnostics > Query Modem. This will send several AT commands to the modem, and display the modems response to each command. Find the command that says "AT+FCLASS=?" and look at the numeric results. Mighty Fax and WinFax are also able to tell you which Classes are supported.


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