[asterisk-users] asterisk upgrade

[nik600]

hi

i've got a production system running asterisk-1.2.4/ with
zaptel-1.2.4/ using a beronet  Beronet BN8S0 and  TE205P .

at the moment (fortunately) i'm not experiencing any kind of
particular problem, do you suggest me to upgrade asterisk?

and zaptel?

and misdn?

thanks