How to install Analog Extension

Hi,

I have analog Card AEX800 (4xFXS & 4xFXO)
I want configure Analog extension (connect analog phone to fxs port).
How I do it ?

Forgot to tell that i working with asterisknow 1.5

I configure chan_dahdi.conf

group=3
context=users
signalling=fxo_ks
callerid=“320” <320>
mailbox="320"
callwaiting=yes
threewaycalling=yes
transfer=yes
channel => 36

And configure Extension on Freepbx with Generic Zap device:
Extension=320
Display Name=320

channel g3
context from-internal
immediate no
signalling fxo_ks
echocancel yes
echocancelwhenbridged no
echotraining 800
busydetect no
busycount 7
callprogress no
dial Zap/g3
mailbox 320@degault

and a problem is:

If I calling from sip phone to analog device (320) - everything working.
When i try call from analog phone i can’t.

When i pick up the phone, on cli i get:
Starting simple switch on 'DAHDI/36-1’
When i push the first number to get the call, i get on cli:
Hungup ‘DAHDI/36-1’

Please help me.