I and my friend using internet from a local ISP which provide it through LAN.
how we can call each other?
when i call him through phone number i got message that
recipetion is engaged or not online

but when i try ip i am unable to write full ip address that is 192.168.000.040

please tell me how i can enter this ip to call him.

thanks.

use the # 0r * key instead of dots.