Intercom groups are processed using multicast. Each speaker or phone needs to have the appropriate multicast listening address programmed in.\\ 

Below is a list of which multicast groups go to what section:\\ 

Extension / Name / Address\\ 

2000: LE All Call: 224.0.20.0:50001\\
2999: LE Bells: 224.1.20.0:50001\\
2100: Pre-K: 224.0.21.0:50001\\ 
2200: Kindergarden: 224.0.22.0:50001\\ 
2300: 1st: 224.0.23.0:50001\\ 
2400: 2nd 224.0.24.0:50001\\ 

3000: UE All Call: 224.0.30.0:50001\\
3999: UE Bells: 224.1.30.0:50001\\
3100: 3rd: 224.0.31.0:50001\\ 
3200: 4th: 224.0.32.0:50001\\ 
3300: 5th: 224.0.33.0:50001\\ 
3400: 6th: 224.0.34.0:50001\\ 

4000: JH: 224.0.40.0:50001\\ 
4999: JH Bells: 244.1.40.0:50001\\

5000: HS: 224.0.50.0:50001\\ 
5999: HS Bells: 224.1.50.0:50001\\