Meaning of features codes

Mail Server, FAX Server, IM, IP, Call Hold, DISA, Day / Night control, Ring groups, PIN Authentication, Remote Held (SIP Accounts Only), Remote Transfer (SIP Accounts Only)

Ring groups isn’t an Asterisk term. My guess is that you are using FreePBX and haven’t read the documentation. In that case, once you have read the documentation, you need to go to

Maybe you are using Elastix. Here you can get some help

thank you.

i am using asterisk version

Some of those features are not present, even in the samples files. If they exist on your system, you need to ask the person who implemented them.

Asterisk is basically a toolkit and some of those features only exist when you put it together in a particular way.