[c-nsp] 7200 IOS 12.4 NAT SIP issue

[Dan Benson]

I have two 7200's running IOS 12.4 with NAT enabled in two completely 
different locations.  I have been doing some NAT pool reorganizing, 
putting certain inside address into specific outside nat pools.  The 
second I did this, all of my SIP VOIP phones stopped working.  When I 
was overloading to an outside interface I had no problem, now that I am 
overloading to a pool of addresses, my SIP phones give me one-way 
audio.  Could this be a bug due to the new code, or is there something I 
am missing?  Thanks for your help.. //db