Yes, it's possible.  I don't recommend it however.  There are a couple of 
common issues they will run into if they piggy back things.

When the phone resets (for any reason) you'll lose network connectivity on the 
PC.  In some cases we see it actually cause a PC reboot which I've yet to 
understand, but it can be reproduced.

On some (most?) phone sets, the network port is 100MB instead of GB, so you may 
end up restricting network throughput by doing this.  Some phones have GB 
ports, normally the higher end ones, and that will obviously be equipment 
specific, but it's something to watch for.



--
There are 10 kinds of people in the world...
         those who understand binary and those who don't.

From: [email protected] [mailto:[email protected]] On 
Behalf Of J- P
Sent: Tuesday, March 3, 2015 6:11 PM
To: [email protected]
Subject: [NTSysADM] vlan on single port

Hi all
i have a client that is setting up a new office with voip and naturally I'm 
recomending seperate drops and a seperate switch (small office < 30 users) 
,however , as most clients, they dont want spend anymore money than they have 
to, so they want to piggy back the computers to the phones ethernet port . Is 
it possible to vlan off the same drop/port ?



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