I have to vouch for the multi-handset digital rigs that are out now. We have one that lets you individually ID each handset, then page whichever one you want, either while you are on a call, or when the phone is not in use. This works especially well for our 15 year old, who is about five minutes short of having his unit surgically implanted into his skull.
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"To those of you who are wearing ties, I think my dad would appreciate it if you took them off." - Robert Moog
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