The ERM04A is a 2U high 19" Rack, 20 slot modular media converter rack. It provides an economic solution in high density fiber converter installations in enterprises or central offices.

The ERM04A-SNMP is a Network Management Controller card that can be placed in a compatible ERM04A series chassis to provide network management functions.

The ERM04A-E1 slide in card DSU/CSU is a digital access unit for Unframed or Fractional E1 services. The ERM04A-E1 data channel supports user-selectable transmission rates via randomly selected E1 timeslots, which provides integral multiples of 64kbps or 56kbps, up to a maximum 2.048Mbps (unframed), for a line attenuation of up to 43 dB on twisted pair or coax cable.

The ERM04A-5E1 is a slide-in card E1 inverse multiplexer capable of bundling up to 5 E1 lines for cost-effective connection of 10/100BaseTX or 100Base-FX LANs over multiple E1 transports. The ERM04A-5E1 inverse multiplexer transmits up to a 9.92Mbps Ethernet bridge channel (GFP-F encapsulated) over 5 E1 links. The ERM04A-5E1 bridges the gap between E1 and E3, allowing bridges to operate at faster rates.

The ERM04A-8E1 is a slide-in card E1 inverse multiplexer capable of bundling up to 8 E1 lines for cost-effective connection of 10/100BaseTX or 100Base-FX LANs over multiple E1 transports. The ERM04A-8E1 inverse multiplexer transmits up to a 15.87Mbps Ethernet bridge channel (GFP-F encapsulated) over 8 E1 links.9.92Mbps Ethernet bridge channel (GFP-F encapsulated) over 5 E1 links. The ERM04A-5E1 bridges the gap between E1 and E3, allowing bridges to operate at faster rates.

The ERM04A-16E1 is a slide-in card E1 inverse multiplexer capable of bundling up to 16 E1 lines for cost-effective connection of 10/100BaseTX or 100Base-FX LANs over multiple E1 transports. The ERM04A-16E1 inverse multiplexer transmits up to a 31.74Mbps Ethernet bridge channel (GFP-F encapsulated) over 16 E1 links. ERM04A-16E1 bridges the gap between E1 and E3, allowing bridges to operate at faster rates.