I created two Ring Groups (6111 and 6112).
And Ring Group 6111 that will ring extension 1000 then the ring group overflows to another Ring Group 6112 that rings extensions 1000 and 1002. Then the "Overflow Point" will be extension 1002.
But never goes to the VoiceMail of 1002. But if you call directlly to extension 1002, and no answer, goes to the VoiceMail.
Thanks!!