... Cisco`s new, compact, high-density Smart Serial connector to support awide variety of electrical interfaces when used ... Asynchronous/Synchronous SerialCompatibilityCisco 1841 ,Cisco 2801 ,Cisco 2811 ,Cisco 2821 ,Cisco 2851 ,Cisco 3825 ,Cisco 3845ManagementSNMPApplication/UsageWide Area NetworkAdditional ... HWICConditionAll the items are 100 % Original Cisco .WarrantyAll new cisco are come with one year ...