NetworkSellers.com is specialized in optical components developing, researching and manufacturing. We provide Compatible transceiver, module, card, cables, etc of major Networking brands like Cisco, Juniper, HP, DELL, etc. All our compatible devices are tested prior to shipping so you can be sure that they will work well with originial devices on arrival. We have ready stock for all compatible moduels and can ship it out in two business days. Three-year warranty is provided to all compatible devices. You can buy from NetworkSellers.com in confidence.