In the past, I remember that there were issues with having variable length dial-plans at different sites: the inter-digit timeout was set cluster-wide, and so folks at a site with, e.g., a 4-digit dial-plan would have to wait a long time (whatever the interdigit timeout was set to) before their call would complete.
I have heard that this is no longer a problem. Is that because of some new capability to set the interdigit timeout by region, or something? Or is that information incorrect and it still is an issue? (This is a situation where there is 3-, 4-, and 5-digit dialing at different sites. They want a centralized CUCM, and are adamant about not changing dial plans.)
Also, any issues in such an environment with CER?
Thank you for any information/direction you may have!