I've got an office with 18 phones.
This morning, six of the phones are displaying the message that they're useing Call Manager Fallback.. Sure enough, I log onto the router setup with fallback and it shows six leased addresses.
It's only 6 of the 18 phones though, the rest are working just fine!
How can I get these 6 phones to regeister with the call manager? I've tried everything I can think of, included chaning the keepalive, but I can't get them back on the call managers..