I have a bit of a strange scenario, i have a cluster 6.X and users in one site are unable to transfer calls internally. They get "your call cannot be completed as dialled" as soon as the second digit of the seven digit extension is pressed. They are able to transfer externally, put calls on hold etc so i would think that rules out the DSP`s...i have checked the dial plan there are not any patterns matching the seven digit extensions that block the call from being routed.
I have seen another post where there was an identical issue on CCM 5.X but i think this should affect all sites not just one.
CSS and Partitions are all correct and in the correct place.
Any ideas before i go to TAC ?