Correct! I found that this could easily be fixed by ensuring 3cx does not send an invalid distinctive ring alert-Info in the invite (something like http://www.notused.invalid.tld). I believe that this issue has also now been fixed by Grandstream.They had a issue where the phone would only ring once
Not sure about this. Need to test some more when I get my phone back.I want to be able to maintain a "central" phone book and contact list
No snags in manual configuration. Firmware updates quite straightforward - I used manual file select rather than http or ftp, but was quick and easy. Sound quality is (to my ear) very good - HD audio on handset or speaker is way better than my older phones.When you configured it, did you have any snags? Any issues with the Firmware updates? Also, how was the sound / voice quality?
If you already have the latest firmware, factory reset the phone and provision it using the template that I gave to you.
Is there an "Intercom" App or Function on this phone?
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.