RG2 is the destination if no answer on RG1 after 15 seconds.
Phones are Yealink T46S up to date.
The problem is : when a call arrive on RG1 and extension 100 does not answer, the call overflows on RG2. If 101 answer the call, extension 100 has a missed call and she calls back the client whereas someone has answered the call in RG2…
100 is the secretary… the others are the team members…
I am not sure about ring groups, (don’t have a system in front of me at the moment) but in Queues you can enable “mark calls answered elsewhere” to avoid this issue.
Instead of a ring group, send external calls directly to a second extension on the secretary’s phone. Set up Follow Me with the new extension and 101, 102 and 103 in the Follow-Me list. Set Initial Ring Time to 15, Follow-Me Ring Time to e.g. 45 and Ring Strategy to ringallv2.
If the above is not useful, please post details about your constraints.