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Home Products Fibre Optic Converters Ethernet Aggregation Platform Inverse Multiplexer/Ethernet Switch Platform

Inverse Multiplexer/Ethernet Switch Platform

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FRM220A Inverse Multiplexer/Ethernet Switch Platform

Inverse Multiplexer/Ethernet Switch Platform

The FRM220A is a 2U high 19" Rack, 20 slot modular media converter rack, designed with one Gigabit Ethernet switch uplink, for efficient scalability and easy deployment in access networks. It provides an economic solution in high density fibre converter installations in enterprises or central offices. All critical components, Power, fans, management module and interface cards are hot swappable, allowing online field replacement. The hot-swappable power modules can be chosen from AC100-240V, DC18-36. or DC 36-72V. The chassis also has a pair of alarm relays and is able to stack up to 10 chassis as one management unit.

Inverse Multiplexer/Ethernet Switch Platform diagram
















Ethernet Aggregated Platform - Application diagram


  • 2U 19” 20-slot Chassis with AC/DC power redundancy
  • Chassis cascade up to 10 with one IP management
  • Chassis backplane consists of passive components
  • Chassis supports uplink Gigabit Ethernet switch 4-port 10/100/1000T plus 4-port 1000SX/LX SFP trunk card
  • All modules and cards support hot-swap function
  • Two alarm relays
  • E1 Inverse Multiplexers are supported by Gigabit Ethernet switch trunk card
  • Gigabit Ethernet OAM/IP Switch
  • Metro Ethernet Switch

Inverse Multiplexer/Ethernet Switch Platform cards









Power Redundancy: All the FRM220A chassis power supplies are hot swappable and modular, installing two into a chassis provides redundancy should a single power supply fail. A fully loaded chassis can run continuously with only one power module fitted into the chassis.

Cooling Fan: To further increase system reliability, the FRM220A chassis is fitted with two hot swappable fan modules. Both fan modules can be easily removed from the rear of the chassis, without interruption to the operation of the line cards. A fully loaded chassis can run continuously with only one fan module fitted into the chassis.

FRM220A Chassis

Chassis Cascade: The FRM220A features cascadeable management which allows managing a stack (up to 10 chassis) from a single IP address. Chassis are interconnected with standard UTP cables that carry control signals. Each chassis has its own ID, starting with the master chassis ID0 and cascading up to ID9.

Gigabit Ethernet switch with Network Management: The FRM220A incorporates a 24+4 Gigabit Ethernet Switch. Twenty ports supply each slot of the 2U 20-slot chassis with an electrical gigabit Ethernet uplink with the remaining four electrical gigabit ports accessible via the rear of the chassis. The additional four ports are provided by SFP sockets. All eight gigabit ports (4+4) are usable without restrictions for uplink aggregate to the Ethernet Metropolitan Area Network (E-MAN). The FRM220A-GSW/SNMP card transmits Ethernet between the subscriber equipment (bridge/modem or network interface card) and the E-MAN. The card provides a user-networking interface with Ethernet packets. This card is capable of providing high bandwidth for assembling Ethernet traffic. The FRM220A-GSW/SNMP card is not only the system aggragate/trunk module, but also the system's control module, providing OAM / IP Management functions.

Protocol Supported: The FRM220A chassis has been designed as a Multi-serivce platform. This allows network administrators to deploy the chassis in a wide range of network. Technologies supported by the chassis included Fast/Gigabit Ethernet,  E1/T1, V35/X21/RS530, Serial RS485/422, Voice FXO/FXS, Repeater, Fibre Multiplexer and E1 Inverse Multiplexer (Supported  by Gigabit Ethernet trunk card).



  • Console RS232(DB9);
  • LAN 10/100 Base TX RJ45

Physical Specifications:

  • Dimensions: 303mm x 438mm x 88mm (W x D x H)
  • Weight: 5.2kg w/o P/S

Power Characteristics:

  • AC : 100 ~ 240VAC
  • DC24 : 18 ~ 36VDC, DC48: 36 ~ 75VDC

Environmental Specifications:

  • Operating 0°C ~ 60°C
  • Storage -10°C ~ 70°C
  • Relative humidity 5% ~ 90% non-condensing
  • Predicted MTBF : 65,000 hrs

Certification: FCC class A, VCCI class A, CE, RoHS