telnet 38.242.250.251 6025     <hit the enter key several times>

If you receive this error:
(kotfilad@staff1) telnet 38.242.250.251 6025
Trying 38.242.250.252...
telnet: Unable to connect to remote host: Connection refused
Someone else is telnetted into your router.

Another error you may encounter:
%Error opening tftp://255.255.255.255/network-confg (Timed out)
%Error opening tftp://255.255.255.255/cisconet.cfg (Timed out)
%Error opening tftp://255.255.255.255/router-confg (Timed out)
%Error opening tftp://255.255.255.255/ciscortr.cfg (Timed out)
unfortunately you just have to wait for it to time out  <cntrl-shift-6-x keys all at once; then hit enter>

en
conf t
hostname p8r1

line con 0
 logging synchronous
 exec-timeout 0 0

interface Serial0/1
 ip address 81.0.0.2 255.255.255.0
 no shutdown

interface Serial0/2
 ip address 83.0.0.2 255.255.255.0
 no shutdown

interface Serial0/3
 description currently a DTE interface
 ip address 84.0.0.2 255.255.255.0
 no shutdown

router igrp 200
 network 81.0.0.0 
 network 83.0.0.0
 network 84.0.0.0

end
 
wr mem