Setting up QOS on your routers to support ShoreTel VoIP across a WAN connection requires that you employ some creativity in your configuration.   Think of Class Marking as a way of “coloring” packets so that the routers no how to treat the packets when there is any kind of congestion.   We want voice packets to have a priority over data packets, so we color them and tell the carrier or WAN router which color is voice.   Generally, QOS strategies employ [...]