After trading e-mails with a member of the FDNY Communications unit we can expect to see the call boxes return to service possibly as early as today. It appears the issue was a faulty circuit and there is no plan to phase out the boxes that exist today on Roosevelt Island.
As this issue has now been cleared up I will now keep my keyboard quiet regarding this issue. Thank you for indulging me.
For those readers that can appreciate anything that yells vintage old New York check out Call Box 1914 which sits just East of the gate into Southpoint Park as well as Call Box 1913 which sits across from Goldwater Hospital on the grassy divide between the street and the promenade.