Cisco-Voip

aaa authentication login h323 group radius
aaa authorization exec h323 group radius  
aaa accounting update periodic 1          
aaa accounting connection h323 start-stop group radius
aaa pod server server-key 0 RADIUSKEY auth-type any

(Replaced by in 12.4
aaa server radius dynamic-author
 server-key RADIUSKEY
 auth-type any
)

gw-accounting aaa
   suppress rotary

radius-server retransmit 3
radius-server authorization permit missing Service-Type
radius-server vsa send accounting
radius-server vsa send authentication
radius-server host X.X.X.X auth-port 1812 acct-port 1813 key 0 RADIUSKEY

NOTE0: Replace RADIUSKEY with radius key of ras in IBSng
NOTE1: Set NTP Server on Cisco Router to ensure time is correct and sync with accounting server.
NOTE2: Make sure you use valid timezone on router