Communications: Voice, Radio and Data - Wireless intercom or wired intercom help.

I am looking for an intercom system. It can be a wireless, or wired. It does not really matter. Wireless would be preferred but wired would work. It will be for a quadriplegic so it will have to be in an on all the time mode. This one was one we were looking at but seems to be discontinued.
Reporter RWIS Chamberlain Wireless Portable 4-Channel Intercom System (Pair). Does anyone have any suggestions? Thanks for your help. I want to get something for him that will work.

Aiphone (http://www.aiphone.com/products/alpha-list/detail/lem) makes some of the best, most fool-proof stuff around. It's wired, but everything is clearly labeled and simple to install.

Voice-activated walkie-talkies and baby monitors are other options.

If it's a life safety situation you may qualify for financial assistance for a "nurse call" system that not only allows you to audibly monitor the patient, it will also allow him to place a call-for-help using any number of human interfaces. It can also monitor and annunciate bed-out alarms, wheelchair alarms, IV alarms, vent alarms, telemetry alarms, and other medical equipment. These systems can also output the alarms to pagers, cell phones, e-mail, and IP.

Not necessarily life safety but my friend would like to communicate with someone in the other room without having to push a button on an intercom. Must be voice activated and be able to be on all the time especially when he is in bed and immobile.