Allied Telesis AT-XEM-2XP voice network module

AT-XEM-2XP - 2 x 10GbE XFP port, Hot-swappable / Removable High Speed Expansion Modules (XEMs)
Allied Telesis XEMs offer a high degree of flexibility that future-proofs your network investment against changes in network infrastructure, topologies, and physical link requirements. XEM expansion modules can be used in a variety of configurations to provide tailored solutions that meet ide-ranging physical networking requirements. Whatever your network needs, Allied Telesis has a XEM that is right for the job.
Achieve expandability with the XEM-12T, which has 12 copper ports to easily add maximum Gigabit Ethernet port density to your network.
Enjoy flexibility with the XEM-12S, with 12 SFP ports to let you aggregate both copper and fiber links.
Network scalability is simple with the XEM-STK. Use this high speed stacking XEM to create a single "virtual chassis" from multiple x900 switches, increasing resiliency and port density without increasing management complexity.
Achieve high performance with the XEM-1XP and XEM-2XP 10 Gigabit Ethernet XFP XEMs. With true ten Gigabits per second throughput, these XEMs support hot-swappable XFPs and provide high-speed, high-capacity fiber uplinks, up to 20Gbps of non-blocking throughput per XEM.