Asterisk configuration with primary flow (pri)

To transfer the configuration from older PBX to new PBX. (my older PBX used a primary Flow)
Can i only copy the file : zapata.conf and zaptel.conf in the new PBX?

Zaptel has been replaced by Dahdi in supported versions of Asterisk. You will need to read Zaptel-to-DAHDI.txt and also UPGRADE.txt as some other details, including dialplan syntax details, have changed.

Thanks, but wanting to set up a new pbx without reference to the old PBX what do I do?

check the system.conf under /etc/dahdi, it should be very similar with zaptel.conf.