Escaping from Multiple Reverse Telnet Sessions on a Cisco 881W Router (880 series)
Sometimes you may have closed your laptop or left a connection open somewhere, and you wont be able to connect to the AP on the 881W, and this is also true for any other tty’s on Cisco’s.
router1#telnet 188.8.131.52 2002
Trying 184.108.40.206, 2002 ...
% Connection refused by remote host
What you need to do is clear the line.
881W#clear line tty 2
881W#telnet 220.127.116.11 2002
Trying 18.104.22.168, 2002 ... Open
User Access Verification
After you log in and you want to get back to the router, you can type exit, and confirm, or do the famous cisco combination: Press ctrl+shift+6 then ctrl+shift+6 then x. This will bring you back to the first vty.