We have non-IP setup with a Cisco quickset C20 running ISDN lines using a Cisco ISDN link, when calling the polycom bridge we receive audio but no video is sent or received. I can make a direct call to another polycom and have no issues but when call...

hello everyone, I have installed a Cisco Telepresense ISDN link (l1.1) and a Quick set C20 (5.1.), I am able to dial out and in, but the person at the other end cannot hear me. I have check the mic to make sure is not muted. If you could guide me a c...