Silencing a Cisco 2911 router for home use – Matt's Tech Pages
Amazon.co.jp: Cisco 2911 Integrated Services Router – 4 X HwIc, 2 X CompactFlash (CF) Card, 2 X Services Module, 2 X pvdm – 3 X 10/100/1000Base-T WAN cisco2911 – Sec/K9 by Cisco : Electronics