[Asterisk-Users] TDM 2 FXO + Traditional PABX

[Pablo Fernandes]

Dear friends,

I have i external line which arrives in Asterisk
* LINE ----> Asterisk
and i have 6 extensions. Can i use a tradition PABX to connect this 
extensions?
* LINE ----> Asterisk -----> PABX ===> 6 extensions      ?
What i would need? Only a TDM card with 2 FX0 for traditional telehpnes?
8 LINE ---> FXO (Asterisk) FXO ----> PABX ===> 6 extensions  ? would can 
be that?
The extensions would obtain Dial tone to make calls too ?

thanks for any advice
Pablo Fernandes