Well I just bought what I thought was a 56H base station, but it was 60B. No idea how to config it with RC. There is no auto-provisioning feature in the 60B web interface that I can see. If there's an easy solution to this, please advise. If the 60B base station is plain not supported, please get it online, or I'm switching!
Figured out how to manually provision, so now I don't care whether it's added or not. For those of you in this thread who want to use the W60B with RC, it's pretty straightforward--search for the ringcentral instructions for the Yealink 52P, then adapt those instructions for the W60B. Took me 5 minutes once I found it!
I have made it work with only a mild bit of frustration - not sure to what degree it matters, though it does work. I have a W60B plus two W56H phones attached to it. I go to the IP address and login, then via Yealink Support downloaded the most up-to-date firmwares for both devices (W60B: 188.8.131.52 and W56H: 184.108.40.206). Once updated, I login again to the IP address. Then Settings --> Auto Provision. I delete the username & password and add the URL provided for auto-provisioning from RingCentral. The option to then Auto Provision is at the lower part of that page. It worked, BUT the auto-provisioning annoyingly downgraded my firmware to one that was, I believe, 220.127.116.11. The phones than say "old firmware please upgrade" on the main screen, though the continue to work. When I then upgrade the firmware, I have found that they subsequently automatically downgrade once again. It appears that RC's Autoprovision is installing an antiquated firmware, which is annoying and frankly unacceptable. They should update their software to either allow for us to manually upgrade the firmware or update their own custom firmware accordingly (assuming it's some sort of custom firmware). Of note, while I have tested this out via my ethernet connection at home over the weekened, and it works with my office system without error (including incoming and outgoing audio), I cannot attest to long-term sustained usage since I just set these up over the weekend. I'm definitely curious to know what everyone else is figuring out. I hope this was helpful to you all!