We got a client passed over to us last week. They have a CICS with ?? Rls 5 or 6 I think. The T7316 e sets show up in programming as M7310 sets. The issue is the speaker button is not ingaging when you press it. The sets are labeled with 2 intercom buttons eventhough the last button is actually a handsfree button. I usually only put 2 intercom buttons on a set not the handsfree??? What is wrong here ???