OT: Terminal Router, and some noice on the lines

I am not a terminal Guru, so sorry for this basic questions.
when doing a show line i do recive the following input from my terminal router.
it is an 3640

Problem are the Noice

Line 1-6 are 1841
Line 7-8 are 3750
Line 9-10 are 3550
Line 11 old 3640 that are a FRS and BB1
Line 12-13 are 2650 and 2651 BB2 and BB3

* 1 TTY 9600/9600 - - - - - 4 33 0/0 -
* 2 TTY 9600/9600 - - - - - 4 32 0/0 -
* 3 TTY 9600/9600 - - - - - 4 50 0/0 -
* 4 TTY 9600/9600 - - - - - 4 33 0/0 -
* 5 TTY 9600/9600 - - - - - 4 33 0/0 -
* 6 TTY 9600/9600 - - - - - 4 32 0/0 -
* 7 TTY 9600/9600 - - - - - 6 284 44/137 -
     8 TTY 9600/9600 - - - - - 3 156 0/0 -
     9 TTY 9600/9600 - - - - - 2 3 0/0 -
    10 TTY 9600/9600 - - - - - 1 12 0/0 -
    11 TTY 9600/9600 - - - - - 3 472 43/132 -

config on line and vty

!
line con 0
 login local
line 1 32
 exec-timeout 0 0
 no exec
 transport input telnet
 transport output none
line aux 0
line vty 0 4
 login local
!
end

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Received on Wed Jun 06 2012 - 22:34:27 ART