[Asterisk-Users] Setting up asterisk with current PBX?

[Jason Hawthorne]

We currently have a Toshiba Perception EX and I would like to start
moving toward VOIP.  Is there anyway we can run these two systems in
parrallel?  Better yet, is there anyway we can run fully on asterisk
using the current PBX hardware?  The current PBX has a mix of analog,
digital and electronic cards in it.  I tried to google for advice but
I didn't find anything that pertained to this.

-Thanks
Jason