Olencom's FMC CSU/DSU product series provide a very flexible economic solution of E1 network access. One flexible E1 line interface and one or two different customer equipment interfaces allow use the FMC when needed only part of 31 DS0 channels or all 32 DS0 channels (clear channel) with maximum effect.

The FMC-IP-4E1 — IP Inverse Mux — provides connectivity from 10/100 BaseT LAN to E1 WAN through multiple E1, up to 4 E1 links. FMC-IP-4E1 also provides a bridging function from Ethernet to E1 links. This unit can provide customers from 2Mbps to 8Mbps network bandwidth.