I couldn't get my SMH10R's to intercom pair. Did all the usual things as per the user manual, including factory and fault resets. Still no luck, BUT I tried something and it finally worked. 1) Turn both headsets on 2) Press and hold the centre button of both headsets until you hear 'Intercom Pairing' 3) Press either or both headset's centre button once. This finally got them to pair. Its different that the process in the user manual, which says you only have to do this on one of the headsets. Hope it helps anyone else out there.
SMH10R Intercom pairing workaround