What is the 'ringer equivalent' number for the FXS port on an analog MultiVOIP? How many Plain Old Analog Telephones can 1 FXS port ring at the same time?

The REN# is 5 for all the new generation analog VOIPs, (i.e. 210, 410, 810), so the VOIP FXS port should be able to ring 5 phones at the same time.