The HERN has not replaced HEAR. They're intended for two different purposes. HEAR is very much still alive, used regularly and effectively, in the areas of NJ which I monitor and HEAR is also still endorsed in the
NJ EMS Communications Plan (PDF). Yes, many hospitals are a little lax with their HEAR radios, but the solution is not supposed to be, nor do I think it should be, the state-wide trunked system.
This isn't a problem with the HERN, since it is intended for interfacility coordination and large-scale incident management, not for ordinary patient reports. HERN is doing what it is supposed to, what you describe is a problem with HEAR. A problem which might be helped by testing it occasionally just as the HERN and SPEN networks are tested. I am a little curious about the squad which doesn't have a HEAR radio in its rigs, as it is required by the NJSFAC of member squads and the state DOH of the services it regulates.
There are communication failure protocols in every medical control system I've heard of, it would be quite an irresponsible medical director that doesn't consider that.
We're straying a bit from the topic; to the original poster, the designated BLS (non-paramedic) patient report channel in NJ is, as mentioned, JEMS 2 or 155.340. 155.400 is not used for this purpose in NJ. Some counties have an additional channel for this purpose but Morris is not among them.
If ALS (paramedic) is on board then the med channels may be used but more than likely it will be a cell phone. Refer to the RadioReference.com Wiki or the NJ EMS Communications Plan linked above for the UHF med channel frequencies.
Jim