I know "in the book" is always recommend to have a separate cable for each device... But in the real world... Is that advantage really noticeable? Cable is not expensive but Cat6 and up are thicker and when you have 7 stations to feed, is not the same to pull 7 cables than 14...
We purchased about 65 phones. Of the 60 phones we sent back a few while they were under warranty. But a few others were not. We purchased them I believe in 2014. I'd say we've returned about 5 under warranty for the Switch issue or the Ghost dialing issues (Where it will randomly start calling people). Sometimes the Ghost dialing issue was fixable by cleaning the screen sometimes it was not and had to be sent in.
For the Switch themselves of the 65 we purchased we had about 5-6 stop working. So we put in a switch in the office or cubicle.
For the Ethernet cable when our vendor was out hire wiring our building we had them use their equipment to test the RingCentral Ethernet cables that came with our phones and after testing a 10-15 of them 7-8 of them failed the test. We have been given a credit by RingCentral for this I don't recall but we ultimately bought our own cables and replaced all of them.
This is just my experience with them. Hopefully yours is better. We try to get new users to use the Windows Desktop client and avoid buying the phone.
1) From a bandwidth point of view, a switched PC plugged into the phone line is sharing bandwidth (since they both go to ONE port on the master POE switch). As such a user who is on the phone and downloading large files, streaming video, or some other high bandwidth usage could see issues unless you've carefully planned out your VLANS and set up separate prioritization rules for the phones and PCs on the network. If you set this up right it should prioritize the phone traffic over other traffic, but using the phone may slow down a download, or a large file upload. Just be aware of this - if the user is a poweruser that needs that bandwidth - run them two lines. And don't do this unless you understand how to segment the traffic and prioritize it.
2) From a monitoring point of view some switches may be able to more easily monitor individual users if they're on separate switch ports.
3) Any bandwidth restrictions, or traffic limitations you apply to a port will apply to all devices connected to that port.
4) Only do this if you're using managed switches that can designate a phone and PC VLAN
5) Remember that POE doesn't passthrough - so you cannot (for instance) hook a POE camera on the other side of the phone's switchport - there will be no power.
6) It's not recommended to daisychain another switch off the phone switch. If a user already has a multi-port switch for printers, multiple devices, cameras, etc. under their desk, run a separate line for that.
7) If you have a content managed switch it may have the ability to block traffic to specific websites or endpoints. Be sure your ringcentral contact points are all whitelisted and won't be blocked by either AMP or Content based traffic management at the network level.
8) Be sure your DHCP settings are correctly set up for the VLAN that hosts the phones and the VLAN that hosts the PCs for the proper default settings.
Hope these help. As a partner I set up networks and phone systems for ringcentral clients, we've seen it all.