IGS tags in demo mode

hi,
i am facing an issue over the IGS tags communication in demo mode.
just i need to clarify that number of tags i can use in demo mode?

if not limited then why all the tags are not working continuously at a time.
(tags were working alternatively)
any suggestions or solution will be helpfull.

Last I had IGS in demo mode it worked for 30 minutes and required a server reboot.

There is no tag limit and the demo should run for 2 hours at a time. If you are alternating between good and bad quality then you are probably polling the device too fast. You should see some type of error message being posted in the IGS Server event log.