Vertical doesn't offer tech support to connect 3rd party sip endpoints so I wonder has anybody tried and was successful? I am interested in possibly connecting an analog adapter for a fax or cordless or something like a grandstream wp820 wifi handset at a remote location.
It would be nice to start a list of compatible devices but I know its not a very common need for this type of system.

I have worked on the Ericsson/LG EMG series that the Summit is based on, and I recall setting up wireless Konftel SIP conference phones, so I definitely know it can be done.

a little late but I have a doc that might help.

If you care to share that doc. my email is eric77 at inbox dot com thanks