Digital VoIP Gateways

G400 Digital Gateways

Built on a powerful combination of the Asterisk open source communications engine and a state-of- the-art embedded platform, G400 digital gateways provide the best value for connecting traditional telephony (T1/E1/PRI) to IP (SIP). 

The G400 gateway software is based on the Asterisk communications engine and is managed through an intuitive point-and-click GUI, which allows for easy navigation and effortless setup. The digital gateways feature a power-saving embedded design with a highly efficient digital signal processor (DSP) handling all media-related operations.

The G400 VoIP gateway includes four software-selectable T1/E1/PRI interfaces and supports up to 120 concurrent calls. With a robust feature set, including the ability to configure calling rules for connecting many combinations of telephony providers (traditional and VoIP) and PBX’s (legacy and VoIP), failover routing to ensure calls won’t fail, licensing for the maximum number calls the appliance supports, SIP to SIP transcoding and a proven design of no moving parts to fit any environment, G400 Gateways are proven to support most applications.

The G400 digital VoIP gateway is available in:

  • Quad Span Digital T1/E1/PRI to VoIP Gateway Appliance

Gateway Applications

PSTN Trunking

Businesses already IP at the core can install Vega gateways to connect to the PSTN for failover.

SIP Trunking

Businesses with legacy phone systems can install a Vega gateway to seamlessly connect to VoIP services or a SIP trunk and eliminate the PSTN connection.

Analog to VoIP

Use a Vega gateway to easily connect your analog phones and fax machines to your modern IP infrastructure.

Office Survivability

Guarantee operation of your branch offices during power or Internet failure. Vega gateways automatically reroute calls to failover dial plan and PSTN lines.

Gateway Features

Simplified Deployment

All G400 gateways have a Quick Wizard to quickly and easily deploy, eliminating the need of IT admin and complicated setup process.

Flexible Routing

Advanced flexible call routing with automatic failover and bypass routing.

Advanced Troubleshooting

Built-in call tracing and debugging utilities.

Highly Interoperable

All G400 gateways support the standard VoIP/SIP protocol and have built-in transcoding so you can trust that your phone calls and faxes will work even in challenging environments. 

Field Upgradable

Firmware updates can be performed remotely through a web-based GUI.


Support for T.38 faxing.

Gateway Specifications

VoIP Interface

  • SIP
  • Fax support – up to G3 FAX, using T.38
  • Modem support – up to V.90, using G.711
  • VoIP channel support: 8
  • Audio Codecs:
  • G.711 (a-law/µ-law) (64 kbps)
  • G.729a (8kbps)
  • G.723.1 (5.3/6.4 kbps)
  • G.726

Telephony Interface

  • 4 T1/E1/PRI w/ RJ-45

LAN Interface

  • ‍2 ‍10/100/1000 Ethernet


  • 1G400F - Quad Span Digital T1/E1/PRI to VoIP Gateway Appliance, North American Power Supply
  • 1G401F - Quad Span Digital T1/E1/PRI to VoIP Gateway Appliance, Europe Power Supply
  • 1G402F - Quad Span Digital T1/E1/PRI to VoIP Gateway Appliance, United Kingdom Power Supply
  • 1G403F - Quad Span Digital T1/E1/PRI to VoIP Gateway Appliance, Australia Power Supply
  • 3244-00042 - Digium Gateway Appliance Single Unit 19" Rack Mount Ear

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