I have a Cisco 851 that I am trying to access. DHCP works, and I am able to obtain an ip. I think the router is at factory default settings. When I try to telnet or ssh the connection is refused (I assume Cisco's default config). The documentation I see for this router makes reference to "sdm". But I cannot seem to find the download available anywhere. Can someone point me in the right direction, or provide instructions for accessing via aux port.