You have to make sure your inbound trunks are capable of 64k data and that you have the bearer capacity for the route set to allow 64k.
Once that is verified, you can use a vacant DID extension number for a hunt group pilot with the ELU-26 extensions as members, or you can use number translation to change the DID number to an internal hunt group pilot, or you can use DID numbers for each ELU-26 extension.
Using individual DID's is probably the best alternative if you have the vacant number capacity.The reason is that in the case of an inbound 6 channel call (384k), the call is set up on the first channel, and the codec will respond to the far end with the numbers to be dialled for the remaining channels.....those numbers have to be valid within the network on which the call is traversing between the 2 endpoints.
I have done this on my system (BC9.0E)so I know it works.
Good luck,
Dave Strang
AS far as in