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NetModem Faxing issues


If faxing does not Work

If faxing does not work from the NetModem 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 works but faxing fails

  • Verify that you are using the correct manufactures modem driver on the NetModem Client virtual COM port which matches the physical modem on the server. Avoid using a "Standard" Windows modem driver, as not all modems use the same set of AT commands.. Detailed information on installing a modem driver can be found in Chapter 7 of the NetModem User's Guide.

  • Verify that the modem(s) supports Fax Class 2 , Class 2.0, or Class 2.1. Many of todays inexpensive "Software modems" (also known as Softmodems) only support Fax Class 1 which will not always work reliably over a network connection due to it being a software driven protocol using the local computer's CPU to perform session management. Class 2 and 2.x use hardware based session management from within the fax-modem itself, so they are not effected by network latency. When purchasing new fax-modems for network modem-sharing, choose a model which supports Fax Class 2 or 2.x.

  • Verify that your fax software is configured to use Fax Class 2 or Class 2.0.


How to confirm which Fax Classes your installed modem supports:

  1. Type "device manager" in the Start Search box, and then click Device Manager in the Programs list.
  2. Expand Modems, right-click the modem that you use, and then click Properties.
  3. On the Diagnostics tab, click Query Modem.
  4. In the Command column, locate AT+FCLASS=?, and then note the value in the Response column.

Note: If the Response column contains a value of 1, 2, or 2.0, the modem supports Class 1, Class 2, and Class 2.0, respectively.

Class 2 and Class 2.0 are NOT the same protocols, and it is important to configure the fax software based on which protocol is supported by the modem. Class 2.1 is software compatible with Class 2.0, so if the fax modem supports Class 2.1 you can specify Class 2.0 in the software.

Most Fax Software applications default to using Fax Class 1 when installed, so they will need to be configured to use either Fax Class 2 or Class-2.0 mode in order to work reliably over a networked modem.

 

Enabling Fax Class 2 or Class 2.0 in Microsoft Fax (or Windows Fax and Scan):

Warning: Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. Modify the registry at your own risk.

  1. Click Start, Type "regedit" in the Start Search box, and then click RegEdit in the Program list.
  2. .Locate and then click the following registry subkey:
    HKEY_LOCAL_MACHINE\Software\Microsoft\Fax\TAPIDevices
  3. Expand TAPIDevices, and then click the device ID of the modem.
  4. Click Modem, right-click FixModemClass, and then click Modify.
  5. In the Value data box, type one of the following, depending on the class that you want to set:
      Type "1" to set the fax modem to use Class 1, or
      Type "2" to set the fax modem to use Class 2, or
      Type 20 to set the fax modem to use Class 2.0
  6. If there is also a field named FaxClass, then click Modify and also change it to the same value.
  7. Exit the Registry Editor.
  8. Restart the fax service if it is already started. To do this, click Start, type "Services" in the Start Search box, and then click Services in the Programs list. .In the Services list, right-click on Fax, and then click Restart if it is available. If the Fax service is not already started then ignore this step.

Additional information is available on our Using Microsoft Fax with NetModem page.

 

Enabling Fax Class 2 or Class 2.0 in WinFax Pro:

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

Additional information is available on our Using WinFax Pro with NetModem page

 

Enabling Fax Class 2 or Class 2.0 in Essential Fax (formerly MightyFax):

  1. From the Essential Fax console, click File > Set Preferences.
  2. Cllick on Modem and select the Modem name from the pulldown list. Selecting the modem name is recommended rather then choosing the modems COM port.
  3. Click on Sending and choose either "Class 2" or "Class 2.0" depending on which one your modem supports.
  4. For the Transfer Rate we recommend choosing 14400.
  5. If you also plan to receive faxes you will also need to set the fax Class for this separately, by clicking on Receiving and selecting the same settings.


Can NetModem Client PC's receive incoming fax calls on a shared modem

NetModem allows using a shared modem for receiving inbound fax calls by a client, but this will cause the modem to be constantly in-use by the client that is holding the modems COM port open while waiting for an incoming RING, thereby preventing other clients from accessing this modem.

An alternative solution is to have the Microsoft Fax service accepting inbound fax calls on the NetModem Server PC, and in the NetModem Server Configuration under "Pool Properties", enable the "Use TAPI to open COM port" option. This will allow NetModem Server to be able to tell the fax software to release the idle modem when a NetModem client requests it for dialout, and after the client releases the modem on the NetModem Server it is then returned to the MS-fax software.

This allows an office to have several client computers which occasionally send a fax, but all incoming faxes arrive on the NetModem Server PC.

Warning: not all modems are compatible with the "Use TAPI" option. This option can cause certain non-TAPI complient modems to become non-responsive (until Windows is restarted).
 

 



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