What is the meant of "line 66"?

[eric.huihk]

I meet a set of access management as follows, does anyone know the use of line 66? Thanks

line con 0

stopbits 1

line aux 0

line 66 (////////// why line 66 required ??)

no activation-character

no exec

transport preferred none

transport input all

transport output all

line vty 0 4

access-class 2 in

password 7 02050D480809

login

[Richard Burts]

I believe that line 66 is an async line on this router. The IOS numbering of lines makes allowances for what might be present in the router as far as numbering async lines is done. It might help to understand the relationship here if you would post the output of show line from this router.

HTH

Rick