update pdf docs regarding 2011UAS. no rear port description

hi

i have noticed that these docs:
http://i.mt.lv/routerboard/files/RB2011UAS.pdf
http://i.mt.lv/routerboard/files/rb2011U-qg-130822142451.pdf

also please note that in this doc
http://i.mt.lv/routerboard/files/RB2011UAS_2HnD.pdf
you can see a serial rj45 port but absolutellyno description what cable to use

only dockument that mention it is this one
http://i.mt.lv/routerboard/files/Block-RB2011.pdf

do not mention a rear port that exists and it is a rj45 serial port. i do not know how the cabling is done. will for example cisco rs232 to rj45 cable work ?
please fix this as peaople will not know how to use and what is that port for.

Cisco cable will work

thx for info