Trouble Shooting VoIP issues in a multi-site deployment is a challenge to even the most talented network engineer. It is often difficult to determine what is a voice equipment issue and what is an issue aggravated by a network conditions. As network engineer trouble shooting an issue, having access to network monitoring tools is essential. Sometimes we have to use the basic ICMP tool sets and ping our way through a trace route, but network connectivity is only one element [...]

In telephony, IP QOS is somewhere between a science and an art. Setting up VOIP QOS on your network is essential for toll quality voice from end point to end point, especially across a WAN. Historically, in ShoreTel, IP packets were marked with the DSCP value set in the Call Control Options page. Generally this is generally set as a value of 184 or Precedence Level 5, what CISCO would call Express Forwarding or EF. This value is represented as [...]