FRM220-GFOM04-AD - 4E1/ T1 with full Gigabit Ethernet and redundant SFP optic link Fiber Optic Multiplexer - AC and DC powered

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  • FRM220-GFOM04-AD - 4E1/ T1 with full Gigabit Ethernet and redundant SFP optic link Fiber Optic Multiplexer - AC and DC powered
  • FRM220-GFOM04-AD - 4E1/ T1 with full Gigabit Ethernet and redundant SFP optic link Fiber Optic Multiplexer - rear view
MSRP: $895.00
— You save $200.00


* FRM220-GFOM04-AD INCLUDES a standalone casing with console port and embedded AC and DC48V power supplies
SFP transceivers are NOT included in the unit price. You can purchase Gigabit rated SFPs here

Product description

The FRM220-GFOM04-AD fiber multiplexer is a small but powerful unit. It bundles together up to 4 E1 or T1 interfaces and a full 1000Mbps channel of Ethernet data. It also offers a built-in order wire port for E&M voice connections (for service or troubleshooting between two units connected over the fiber). The FRM220-GFOM04-AD offers redundancy on power source input, supporting AC 90~240V and DC -18~-72V and on fiber connection by having two redundant SFP ports for 1.25Gbps optical modules. The SFP ports bring a great level of flexibility by allowing user to choose the appropriate SFP transceiver for his needs. FRM220-GFOM04-AD multiplexer can also be installed into FRM220 series chassis, like the FRM220-CH20, the 20 slot 2U chassis or the FRM220-CH08, the slimmer 1U rack 19" chassis. Management is available through local console or via web using the FRM220-NMC management card.

The RJ45 Ethernet 10/100/1000Base-TX port supports Jumbo Packets, auto MDI/MDI-X auto speed Negotiation. It also has Dying Gasp feature warning management system of failure because of loss of power (this feature is extremely useful on carrier grade deployments, giving an immediate hint on reason of circuit failure). Besides the Ethernet port, FRM220-GFOM04-AD also transports an RS232 port with maximum data rate of 250Kbps, being very useful in carrying of a craft port to support alarms or other automation processes.

FRM220-GFOM04-AD is a perfect choice for a variety of applications like wireless back-haul for remote areas, E1/T1 and Ethernet  transport over same fiber, inter building voice and data network connections and so on. Unit can be used either under European E1 or US T1 standards.


  • 4 channels unframed E1/T1 (transparent)
  • 10/100/1000Base-T Ethernet
  • Auto MDI/MDIX & Auto-Negotiation or Force Mode
  • Supports flow control 802.3x & 9K jumbo packets
  • Supports link fault Pass-Through for Ethernet
  • One clear channel RS232 up to 250Kbps(Async)
  • 1+1 fiber protection, less than 50ms
  • Supports Digital Diagnostics Monitoring Interface (DDMI) SFP
  • AIS on signal loss on E1/T1 and fiber port
  • Loopback test on E1/T1, RS232, fiber ports
  • Supports local or remote In-band management(Monitor or Configure status) by SNMP manager and console port
  • Supports Order wire Ear / Microphone port
  • Supports On-Line F/W upgrade & Dying Gasp

The FRM220-GFOM04-AD fiber multiplexer works with 1.25Gbps optical SFP transceivers and supports DD enabled SFP transceivers. To check the full range of available transceivers, including single strand BiDirectional models and long haul optics please visit our Gigabit SFP transceiver family page. For questions, please contact our sales department for more details by e-mail or telephone.

Additional information on FRM220-GFOM04-AD: PDF Datasheet; PDF User Manual

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Warranty Information

2 years
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Additional Information

Interface Type:
Fast Ethernet
Interface Type:
Gigabit Ethernet
Interface Type:
Interface Type:
Interface Type:
local console
Transceiver Format:
Power Type:
AC 90-240V embedded PSU
Power Type:
DC 18-72V embedded PSU
RJ45 (Ethernet)
RJ48c (E1/T1)
SFP slot
screw block
dying gasp
9K Jumbo frame support
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