They seem to be already more strict and specific than for Skype for Business Server 2015. In a nutshell those seem to be 1. provide enough capacity for target workloads 2. No latencies over 150 ms must occur
Re: Assessing Network regarding PSTN Calls via Sky...
since you are looking at the scenario for an internal user doing a call via Cloud Connector Ediion, al media will stay internal on a managed network. On a managed network we expect virtually no packet loss, no jitter and latency only what physics determies based on distance. More information on metrics for managed networks can be found in the "Network Planning, Monitoring, and Troubleshooting with Lync Server" https://www.microsoft.com/en-us/download/details.aspx?id=39084
Please let me know if this helps, if not I'm sure we can continue this discussion :)