Good day, I bought a small company two years ago. A UC560 is used for telephony in this company. Cisco IP Phones 7975 are attached to it. An ASA5506-X serves as the firewall. Unfortunately, the UC560 has reached the end of its capabilities and has...

Hello,  I am using a cisco 8865. It is a new phone, just 4 weeks old. when i'm on the phone, it works perfectly with the built-in speaker.however, nothing happens when the handset is picked up. neither the call is answered nor can i hear or speak int...