Can you verify the call flow.
I have 2 clusters. cucm 7 and ccm 4.1
a trunk exists between them.
1.A call arrives on our contact center agent's phone cucm 7
2.They need to transfer this to an agent on ccm4.1 (arc agent).
this works fine.
3.The agent takes the call and then may need to transfer to someone else.
(it could be to another phone on either cucm 7 or ccm 4.1 cluster.)
it is at this point that sometimes and it happens a lot. the transfer button just will not work. they keep pressing and nothing happens. then all of a sudden it might work.
Am i right in thinking that supplementary services are being deployed when you are doing a transfer. should i be checking something?