CSU/DSU what is?
separates 2 sites with leased line
internal vs external csu
internal in a router connected straight to router serial port
external connects by serial to router and serial to out
router install steps
connect to switch rj45 connect to csu use the right sfp to connect to wan connect console to pc power plug and power on
SOHO differences
multifunction device
use internet and vpn
show 1 line per interface
show ip interface brief
show detailed ints
show interfaces
interface status codes
line and protocol(l1+l2)
can also config aux line aux 0
login to console via phone line