I have a small satellite office that i am trying to run a couple of Cisco phones over a VPN. I know this isn't the most desirable way and calls over vpn are prone to jitter. I can still see some benefit in adding QoS to the source and destination side of the tunnel especially if the source is maxing out its connection.
I have been told that Cisco phones use "cost" as default for QoS.
(1) does anyone have a clarify explanation on this? and is there a way to utilize this in a non Cisco environment?
(2) do Cisco phone default tag there traffic using any of the DSCP tags? such as AF41,42 or EF?
(3) Any advice in general would be appreciated here on this.