I have a few polycom 601 phones with the expansion module and I am having an issue with BLF. It originally was not working at all, after some searching I found that I needed to modify my sip.conf file to get it to work. So I modified my sip.conf with the following
That made the BLF work sort of. The only way the BLF will indicate that someone is on a call now is if the person recieved the call, not if they call out. Any ideas?