hello, we have two sites connected to each other via IPSEC VPN Tunnel. one site has the CME installed in it. we have 7821 and 8841 IP phones. In the main site (where the CME is installed) the phones are registering normally and upgrade successfully....

hello, we're facing an issue with one of our branch offices. the issue is that two phones there (8851 model) keeps giving busy tones when tryin to call them. also when they pick up the line and try to press any number it gives busy tone directly. bo...