The MetroMapperTM 622 is a mapper/framer capable of mapping datacom traffic into SONET/SDH transport payloads. On the line side, the MetroMapperTM 622 supports protected STS-12/STM-4 and STS-3/STM-1 interfaces. On the client side, up to sixteen Ethernet interfaces (10/100 Mbps), two 1 GE and one OIF SPI-3 interface with up to 64 logical channels are provided. The Ethernet traffic or the packets coming from the SPI-3 interface are encapsulated by either the GFP-F, LAPS (X.85/.86) or PPP mapping scheme. Low-order and high-order virtual concatenation (VCAT) with Link Capacity Adjustment Schemes (LCAS) for up to 64 virtual concatenated channels is supported. MetroMapperTM 622 provides Ethernet IEEE802.1q VLAN operations and enables Ethernet over MPLS.