About Modem Interfaces

If your business operates in areas with weak ISP coverage, or you have non-traditional methods for Internet access, a dedicated modem interface can increase your network flexibility.

You can add one modem to a supported Firebox or XTM device. In Fireware v12.1 and higher, the modem is available as an external interface and appears in the list of Firebox interfaces. You can specify the modem interface when you configure these features:

The modem interface also appears in the Aliases list. You can add the modem interface to policies on your Firebox.

For mobile VPN connections to a modem interface that has a dynamic IP address, you must:

  • Register the modem interface with a dynamic DNS provider
  • Configure dynamic DNS on the Firebox
  • Specify the domain name for the modem interface in the mobile VPN settings

For more information about dynamic DNS, see About the Dynamic DNS Service.

To configure a modem interface, see Configure a Modem Interface.

Modems and Multi-WAN

You can configure a modem interface to participate in multi-WAN. By default, modem interfaces do not participate in multi-WAN. For information about multi-WAN methods, see About Multi-WAN Methods.

When you configure a modem interface as a multi-WAN participant, link monitor is not enabled for the modem by default to prevent unwanted bandwidth consumption. To configure the modem interface to monitor the default gateway or another source that you specify, you must enable link monitor. For more information about link monitor configuration, see About Link Monitor.

You can configure branch office VPN connections to fail over to the modem interface. For more information about VPN modem failover, see Configure VPN Modem Failover.

Multi-WAN is not supported on the Firebox T10, or XTM 2 Series devices without the Pro upgrade. Multi-WAN is supported on Firebox T15 devices with Fireware v12.3 or higher. Although multi-WAN is not supported in certain cases, modem failover is supported for the Firebox T10 and T15. This is true even after an upgrade to Fireware v12.1 or higher, which converts modems to external interfaces.

Modem Failover

If your Firebox is configured for modem failover, and you upgrade from Fireware v12.0.2 or lower to Fireware v12.1 or higher, the upgrade automatically converts the modem to an external interface with modem failover enabled. If all other external interfaces become unavailable, traffic automatically fails over to the modem interface.

For more information about modem failover, see Configure Modem Failover.

Supported Firebox and XTM Devices

These Firebox and XTM devices support modems:

  • Firebox T Series: T10, T15, T20, T30, T35, T40, T50, T55, T70, T80
  • Firebox M Series: M200, M270, M300, M370, M400, M470, M500, M570, M670
  • XTM models: XTM 2 Series, XTM 3 Series, XTM 5 Series
    To use a 3G/4G USB cellular modem with an XTM 330 or 5 Series device, you must use Fireware v11.7.4 or higher.

USB dial-up modems are not supported.

Connect a serial or 3G/4G modem to a USB port on the Firebox.

  • To use a serial modem, you must have a dial-up account with an Internet Service Provider (ISP).
  • To use a 3G/4G modem, the Firebox must use the minimum version of Fireware OS that supports the modem and you must have a 3G or 4G data plan with a wireless service provider.

Supported Modems

You can configure these modems on your Firebox:

Carrier 3G/4G USB Device Vendor ID Product ID Fireware OS Requirement
N/A (UK and NL) D-Link DWM-221 0x2001 0x7e19 v11.10.7 or higher
N/A (UK and NL) D-Link DWM-2221 0x0BDB 0x1926 v12.0 or higher
AT&T Netgear 340U2 0x1199 0x9051 v11.10.2 or higher
AT&T Sierra 313U 0x0f3d 0x68aa v11.7.4 or higher
AT&T Sierra Elevate 4G 0x1199 0x68a3 v11.8.3 Update 1 or higher
AT&T Netgear BEAM 0x1199 0x9051 v11.12.2 or higher
AT&T Velocity MF861 0x19d2 0x1405 v12.1 or higher
Bell (CA) Huawei E8372 0x12d1 0x14db v11.10.7 or higher
Deutsche Telekom Huawei E3372 0x12d1 0x1506 v11.10.7 or higher
Deutsche Telekom Huawei E3372 0x12d1 0x14dc v11.12 or higher
NTT / DoCoMo (Japan) NCXX UX302NC
0x11f6 0x1035 v12.2 or higher
NTT DoCoMo / au by KDDI / Softbank (Japan) Fuji Soft FS040U 0x1C9E 0xF133 v12.2 or higher
SFR (FR) Huawei E3372 0x12d1 0x14dc v11.12 or higher
Sprint Franklin U602 0x1fac Unknown v11.7.3 or higher
Sprint Sierra 250U N/A N/A v11.7.3 or higher
Sprint Franklin U301 N/A N/A v11.9.1 or higher
Sprint Netgear 341U 0x1199 0x9055 v11.8.3 or higher
Sprint Netgear 341U (revision) 0x1199 0x9057 v12.2 or higher
Sprint Franklin U772 0x1fac 0x0232 v11.12.2 or higher
Telcel (MX) Huawei E3372 0x12d1 0x14dc v11.12 or higher
Telus (CA) Netgear 340U2 0x1199 0x9051 v11.10.2 or higher
T-Mobile ZTE MF683 0x19d2 0x0157 v11.7.3 or higher
T-Mobile ZTE MF190 0x19d2 0x0117 v11.9.3 or higher
T-Mobile (NL) Huawei E3372 0x12d1 0x1506 v11.10.7 or higher
T-Mobile (NL) Huawei E3372 0x12d1 0x14dc v11.12 or higher
Telstra (ANZ) Huawei E8372 0x12d1 0x14db v11.10.7 or higher
Telstra (ANZ) Sierra 320U 0x0f3d 0x68aa v11.8.1 or higher
Verizon Pantech UML295 0x10a9 0x6064 v11.10.2 or higher
Verizon Novatel USB551L 0x1410 0xb001 v11.7.4 or higher
Verizon Novatel U620L 0x1410 0x9022 v11.10.5 or higher
Verizon Global Modem USB730L1 0x1410 0x9032 v12.1.1 or higher

1 The D-Link DWM-222 and Verizon Global Modem USB730L modems require more power than the USB port can supply on T10 or T15 Fireboxes. You may experience poor modem performance or frequent modem reboots. To use these modems with your Firebox, you can connect a powered USB hub to the Firebox and connect the modem to the hub. Other modem models might be affected.

2 To use the Netgear 340U with your Firebox, you might have to disable the Identity Morphing feature on the modem. For more information, see the Knowledge Base article NETGEAR AC340U modem not working with Firebox.

These serial modems are also supported:

  • Zoom FaxModem 56K model 2949
  • MultiTech 56K Data/Fax Modem International
  • OMRON ME5614D2 Fax/Data Modem
  • Hayes 56K V.90 serial fax modem

For XTM 21, 22, and 23 devices, you must use an IOGEAR GUC323A USB to Serial RS-232 adapter to connect a serial modem to the USB port.

See Also

Configure a Modem Interface

Configure Modem Failover

Configure VPN Modem Failover