I need to propose solution of License Unified CM 6.1 7835 Appliance, 2,500 seats ,It should support 1000 device license on feature scalable and expandable. How it will effect on appliance license if Device Licensing Units for IP Communications Endpoint Devices is increase more than appliance license such as 2500.
what is the benfit of Publisher server ? If I propose 2 publisher servers. Is this servers can configure in high availability or redundancy mode.
As the previous post mentions it's IMPOSSIBLE to have 2 PUBs in the same cluster, there is no way to have redundancy at the PUB level.
i'd really suggest you to take some time and read the link i posted about the CUCM deployment models. all of the models that we support are in there.