leejor said:Unless the phones are setup to download a new configuration, and just did, (which is causing the issue). then you may need to look elsewhere on your network. Does the 3CX log show any indication of a registration attempt? Did anything else change on your network that coincides with this problem?
leejor said:One bad phone, maybe, but for all to fail it would have to be something that they all downloaded together.
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.