WE have 3 used IPT-2010-SD phones that i cannot enter programming mode to setup for our system. I was able to get in once on one of them but that was it.

It is a CIX100.

I am pressing the 3,6,9,Hold and nothing.

It says "IPAddress setting..." and then "Can't set IP Address"

When I was in that one time I noticed the phone was set to Manual IP.

Any advice is greatly appreciated.

Thanks