Gfast Devices

Gfast Devices

Gfast and Gfast/VDSL2+ modems

The ARRIS range of Gfast bridge modems deliver fiber-like speeds over twisted-pair phone lines or coaxial cable. The devices confirm to the ITU-T G.9700 and 9701 G.Fast standard with the 106MHz band plan.

The range includes models (FST1000, FST1002) for use in a gateways equipped with a standard Small Form-factor Pluggable (SFP) cage. The modules may be inserted in a SFP cage in the field by an installation technician or the consumer.

The ARRIS FST1203 and FST1305 bridge modems are designed to upgrade the Ethernet WAN interface of legacy gateways. These modems can be mounted in various orientations and locations, desktop or wall mounted, by either installation technicians or the customer.

The FST1305 additionally supports VDSL2 profile 35b received over a twisted pair phone-lines. When in VDSL2 mode it is managed by the ITU-T G.997.1 embedded operations channel.

All models provice K.21 level lightning protection and may be managed using the ITU-T G.997.2 embedded operations channel.


  • ITU-T G.9700 & 9701 G.Fast, 106MHz band plan
  • ITU-T G.994.2 Handshake
  • ITU-T G.977.2 Management
  • Modulation: DMT 2048, 51.75KHz spacing
  • Time Domain Duplexing
  • Trellis Code + Reed Solomon FEC Vectoring
  • Transmission Rate > 900Mbps @ physical layer
  • K.21 lightning protection
  • Device Management - SSH, WebUI, CLI (Telnet)
  • Diagnostic LEDs: Power and Broadband link status

FST1203 & FST1305 additional features

  • LAN – One-port 100/1000 Ethernet, RJ-45
  • Transmission Rate > 1000Mbps @ physical layer
  • Wall mount or desktop placement
  • Diagnostic LEDs for Power status, Ethernet link status and Broadband link status

FST1305 additional features

  • ITU-T G.993.2 Annex Q VDSL2 profile 35b support
  • ITU-T G.977.1 Management when in VDSL2 mode


Note: specifications are subject to change without notice.

ModelGfast - Phone LineGfast - CoaxVDSL2 - Phone LinePHY RateForm FactorPower ConsumptionDimensions
FST1000 Check - Yes - - >900Mbps SFP Module 2W 91mm x 18mm x 16mm
FST1002 - Check - Yes - >900Mbps SFP Module 2W 106mm x 18mm x 16mm
FST1203 Check - Yes Check - Yes - >1000Mbps Desk or Wall mount 3.1W 102mm x 92mm x 30mm
FST1305 Check - Yes Check - Yes Check - Yes >1000Mbps Desk or Wall mount 3.8W 125mm x 125mm x 30mm

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