2820IPPBX, 4 vigorphones, 2 snom m9
External calls come in fine and ring ll 6 phones in the huntiong group. Problem starts when operator tries to transfer call to a specific extension.
We can only transfer external calls to another extension if it has been answered with the vigorphone handset and the handset if put down before the other extension has answered it.
Using the handsfree speaker button to answer the call and the pressing the soft transfer key to transfer the call rings the other extension no problem, but neither internal party can hear each other. When operator replaces their handset external caller is 'lost'.
Internal calls - dialling internal extension rings the correct extension, but again neither party can hear each other. This is true irrespect of the make of phone being used.
Codec of the phones are all default (11u for vigor, 11a for snom) and clearly work as we can answer external calls. I have tried setting the snoms to the same codec -11u, but makes no difference.
Given the mix of phones, everythign points to a setting on the IPPBX but I can't think what to tweak. Any suggestions gratefully appreciated!
