NO - you cannot book 190 days ahead of your trip (regarding the post above that says that - that is wrong.)
Everyone can book meal reservations 180 days from the date they want to eat.
Disney on-site resort guests can book 10 consecutive days of dining reservations, 180 days prior to the start of their resort stay.
So if you are staying off-site and want to book reservations for 5 days of a trip, you would either have to call 5 separate times (180 days out from each dining date) or wait until all 5 days were within 180 days - so wait until 180 days from the last day and book all at once.
On-site guests get a bonus in that they can make one call, 180 days out, and book 10 days worth of dining.