add this configuration in your CME and assign on the second of the ephones
number A111 no-reg both
intercom B111 no-auto-answer label "2000"
number B111 no-reg both
intercom A111 barge-in no-mute label "1000"
button 1:1 2:5
button 1:2 2:4
After applying this configuration When there is an active call on 2000 and the intercom call arrives from 1000 It should put the active call on hold and force the intercom line to become active.
When the call is active on 1000 and the intercom call arrives from 2000,it should ring on the intercom line instead of going to auto-answer.
This has been tested in lab and thanks for refreshing my skill again on this .it was long back story during my CCIE study.
Hope this is going to fix the issue and when your requirement .
PS: Please rate all useful post.
Please rate all useful post.