According to the 2013 edition of NFPA 72 (the 2010 has similar language):
2013:
10.6.9.3* Unless prohibited by the authority having jurisdiction,
supervising station alarm systems shall be arranged to
delay transmission of primary power failure signals for a period
ranging from 60 minutes to 180 minutes.
A.10.6.9.3 This requirement is intended to prevent all of the
supervising station alarm systems in a given geographic area
from transmitting simultaneous trouble signals (and overwhelming
the associated supervising stations) in the event of a
widespread power failure. A trouble signal is not intended to
be transmitted if primary power is restored within the time
delay.
The Altronix AL602ULADA has provided a way to meet this portion of the standard.
Please ensure that you are cutting the jumper mentioned in the .pdf file to meet code.
It will also ensure that more important signals are answered in a timely fashion.
Thanks!
Jordon