Is it possible to upgrade asterisk 13 to asterisk 18?

Asterisk Asterisk Support
1

I am New to Asterisk , I need to upgrade the asterisk 13 to 18, is it possible to upgrade asterisk 13 to asterisk 18 directly ?

2

Yes. Any upgrade things to be aware of are documented in the UPGRADE.txt document[1].

[1] asterisk/UPGRADE.txt at 18 · asterisk/asterisk · GitHub