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Recommended modems for use with FaxTalk fax software.

Fax Modems
Different types of fax modems

To send and receive faxes with FaxTalk software, you’ll need a fax modem (for a traditional analog line) or a T.38 fax service provider (for sending and receiving faxes via an internet connection).  You can skip the requirements of additional fax modem hardware and a telephone line when using a T.38 fax service provider.

If you choose to send and receive your faxes using a traditional analog telephone line, you’ll need a Fax Modem. Fax Modems are hardware devices that connect to your computer and allow you to connect to a standard analog telephone line. has compiled a list of recommended fax modems below. We’ve found that these modems have been to work reliably with the software from internal tests and reports from Thought Communications and our customers. If your fax modem is not on the list below it may work fine with the FaxTalk software, as the software includes extensive support for almost all of the different data/fax/voice modems standards that are available.

FaxTalk is compatible with Class 1, Class 1.0, Class 2, Class 2.0 and Class 2.1 fax modems. You should be able to use FaxTalk software with just about any standard Class 1.x or 2.x modem without issue. Fax Modems are available in serial, USB, and PCI type slot interfaces.

NOTE: Fax modems built into a MFD (a printer / scanner / fax device) will not work with FaxTalk.

NOTE: CAPI compatible ISDN fax devices are not compatible with FaxTalk software.

If you are having problems with a fax modem

Fax modem configuration issues can impact the performance of the FaxTalk software. Problems with fax and voice messaging operations can sometimes be caused by using the generic modem drivers included with Microsoft operating system instead of using the included drivers provided by the modem manufacturer. In some installations, you should use the modem drivers that were provided with the fax modem and not let Windows automatically install generic drivers when you install the fax modem hardware. Generic drivers may not support Caller ID, Distinctive Ring or other advanced features of the fax modem.

Before purchasing a fax modem, you should check with the vendor/manufacture for support of 32-bit and 64-bit Microsoft Windows Operating systems. If you are experiencing problems with using FaxTalk with a specific fax modem, contact our technical support for more info.

Using an existing, older fax modem

Some older fax modems will work with FaxTalk, but you should first check that they support and have updated drivers for your operating system. Some fax modems, especially software-based modems do not include drivers for modern operating systems and should be replaced with a compatible hardware-based fax modem.

Buying or replacing a fax modem

You should avoid software-based modems. They have been found to exhibit unreliable operations when used for faxing and voice messaging. Many of these software-based modem models have been found to be unreliable for use with Microsoft Windows 11/10 and can result in IRQ_NOT_LESS_EQUAL crashes of the operating system. also stocks some of the recommended modems that have been tested for use with FaxTalk and other dial up applications. If you require voice mail capability for use with FaxTalk Messenger Pro or FaxTalk Multiline Server, ensure the fax modem supports voice.

Recommended Fax Modems

This list contains recommended fax modems that have been found to work reliably with many installations of FaxTalk. Results may vary depending on type of phone service and configuration you are using. We have stock and can ship these modems to you (links to our Web store of the available models & stock are listed below)

Single line Fax Modems

  • MultiTech MultiMobile USB MT9234MU-CDC-XR (USB) (Support V.34 Super G3 Fax)
  • MultiTech MultiModemZPX MT5634ZPX-PCI-U-V92 (PCI)
  • MultiTech MultiModemZBA MT5634ZBA-V92 (Serial)
  • MultiTech MultiModemZPX MT9234ZPX-PCIE (PCIe) (Support V.34 Super G3 Fax)
  • MultiTech MultiModemZPX MT9234ZPX-UPCI (PCI) (Support V.34 Super G3 Fax)
  • Zoom Model 3025C (also known as a 3025CF or 3025CG) (Serial)
  • Zoom Model 3095 (USB)
  • U.S. Robotics USR5637 (USB)
  • U.S. Robotics USR5638 (PCIe)
  • U.S. Robotics USR2980, USR5610C, USR5670 (PCI)
  • Conexant USB Fax Modem Hardware based Conexant chipset (USB)

The fax modems listed here also include support for Distinctive Ring and Caller ID in the United States and Canada. Caller ID support not available on all types of phone systems. It is possible to use multiple modems in a single computer but avoid using more than one software-based modem in an installation. Some modem manufacturers do not support multiple modems of the same brand/model in the same installation. If you require multiple phone line support, you can consider a multi-line modem.

IMPORTANT: Some Modem models listed above may be discontinued by the manufacturer and no longer provide support for newer operating systems. Check with the re-seller or manufacturer before purchasing a fax modem to ensure it supports your Windows operating system.

Multi-Port Fax Modems (Internal PCI or PCIe fax modems)

multi-port fax modems support multiple phone lines. Most can accommodate 2, 4, or 8 lines in a single internal card.  These types of modems are used for high-volume faxing and are considerably more expensive than single-line fax modems. These types of modems are not widely available.

  • Mainpine RockForce DUO+ (2 line)
  • Mainpine RockForce QUATRO+ (4 line)
  • Mainpine RockForce OCTO+ (8 line)
  • Mainpine IQ Express (1, 2, 4 and 8 line options)
  • Comtrol RocketModem II, III, IV (4, 6 and 8 line options)
  • MultiTech ISI9234PCIE/8 (8 line) (Support V.34 Super G3 Fax)
  • MultiTech ISI9234PCIE/4 (4 line) (Support V.34 Super G3 Fax)
  • MultiTech ISI5634UPCI/8 (8 line)
  • MultiTech ISI5634UPCI/4 (4 line)

IMPORTANT: Comtrol and MultiTech have discontinued their multi-port models listed above and no longer provide support for newer operating systems. Check with the re-seller or manufacturer before purchasing a fax modem to ensure it supports your Windows operating system.

NOTE: FaxTalk is not compatible with Brooktrout / Dialogic type fax modem cards.

Additional Resources

Additional information, product specifications and suggested retail pricing for fax modems are available from the following links:
U.S. Robotics

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