Hi,
For a deployment with 8 phones I would strongly recommend the Cisco CallManager Express instead, please see http://www.cisco.com/go/ccme for further information.
The phone line in with a CCM- (or CCME for that matter) solution connects to the IP-network via a voice-enabled router.
The CallManager does ONLY run on MCS's or a few specific HP/IBM-servers.
You could use either ISDN or analog line(s), depending on the router configuration.
Best regards,
/M