Registration error msg - unknown origin

[David Cook]

Asterisk SVN-branch-1.2-r38982
chan_iax2.c:5778 update_registry: Restricting registration for peer 
'softphone' to 60 seconds (requested 1200)

New upgrade and I see this message. I have found maxregexpire=xx global 
in iax.conf which defaults to 60. Anyone know of the rationale behind 
limiting to 60? Apparently Firefly is coded to use 1200. Any known 
problem behind maxregexpire=1200?

dbc.