How to set up a SIP trunk for IP authorization?

Question

Asterisk

Good afternoon, there is a number 8800 from Rostelecom with authorization by IP (there is no more data on the type of trunk)
I can’t find the necessary parameters for creating a trunk in which registration by IP - if there are working examples, please share.

Answer 1

[trunk-rostelecom]
fromuser={НОМЕРТЕЛЕФОНА}
fromdomain={IP ПРОВАЙДЕРА}
host={IP ПРОВАЙДЕРА}
type=friend
nat=no
insecure=port,invite
dtmfmode=rfc2833
context=from-trunks
canreinvite=no
disallow=all
allow=alaw