High-Density Gigabit Ethernet Switching Module. Enhance the flexibility and performance of the 3Com Switch 4007 with this high-density Gigabit Ethernet switch module. The module supports IEEE 802.1p for application-based prioritization for converged voice, video and data environments. Layer 2 module offers 9-port configuration. Supports port-based VLANs, IGMP snooping, four groups of RMON, and link aggregation.