I'm working on a 3825. I have 2 7960 phones in fallback mode. The main ext is 52720. When I make a call from one phone on ext 52723 to 52720 I pickup. Then when I call on a second line 42723 to 52720 it doesn't rollover to 1st rollover which is 42720. It will just ring on 52720 as a call wait. I can make this happen with the call-forward noan statement in the config, but it needs to be busy, not noan. It also needs to rollover and ring forever and not hangup after a timeout. I've tried all sorts of combinations and could use some guidance. This is what I have for call-manager-fallback:
max-conferences 24 gain -6
ip source-address 10.136.64.50 port 2000
max-dn 960 dual-line preference 3
call-forward busy 4....