Have a customer that has IP-KCCIS between 2 locations that has been working with no issues for years. They recently installed Velo Edge 620 equipment and ever since then they have 1 way audio between sites. They say no IP Address's changed. I informed them to make sure ports 10020-10531 are open and not being blocked as well with SIP ALG disabled. I have a scheduled conference call with them. Is there anything else I should ask the IT company. We have no access to remote programming and they do not want us onsite. Thanks.