We are in process to migrate our CUCM cluster from version 8.0 to 11.5 , new ip address will be assigned to the new cluster by using PCD , my question is if it possible to make integration between the old cluster and the new one , we don't want to impact the real production (old cluster) and for some reasons we want to migrate phones in stages.
If you mean make calls between the two systems, yes, given your old version the recommendation is an ICT between them and then adjust your dial plan as you move phones.
If you mean make calls between the two systems, yes, given your old version the recommendation is an ICT between them and then adjust your dial plan as you move phones.
HTH
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