The interactions were great. Research at least was a multidisciplinary utopia, in my experience. People knew what was going on in other departments, talks were open to anyone who wanted to attend, and doors were always open. During my time there, I worked or at least had substantive conversations with mathematicians, physicists, statisticians, astronomers, acoustics researchers, and many others. Various eople in 1127 had longer-term collaborations with essentially every other group in Murray Hill at one time or another.