On the nextone we are setup for their ip and number of ports. For testing purpose we removed the prefix. We gave them an ip address to send traffic and we remove username and password because they could not make their side work. Just to point out we are using many switches (nextone, broadworks, cisco, astrisk, trixbox) and are currently providing service to different types of PBX's. But the only panasonic we have currently in service with us is a KX-TGP550 so we are lost as to how to help the vendor. Currently we sent our tech out there and had him setup an adtran with an ISDN/PRI handoff so the customer would be up and running.