Most SIP phones suddenly unable to register
Hello,
Nothing has changed with our client setup, and all was working fine up until yesterday. We have ~15 handsets (Polycom, Cisco, Grandstream), and none of them are able to register with ringroost, though they were able to last week. We've tried power cycling them, but to no avail.
People using Zoiper softphone clients seem to be unaffected.
Please help!