Quick Setup Guide

Introduction
November 2013 39
stream with the external caller's voice is exiting the phone's switch port. The agent's
voice stream is coming into the phone's port and is ignored due to the egress-only
SPAN setting. This is shown in Figure 17.
In Figure 17, audio stream 2 is the only stream of packets that is going out of the
phone's port that is part of the SPAN configuration, so it is the only stream that is sent
to the VoIP Monitor server. The way to fix this issue is to add the switch port that
connects the external phones to the SPAN configuration (Figure 18). This port is
usually connected to a voice gateway device that is used to convert analog phone calls
to IP-based phone calls.
Figure 17. Egress-only SPAN issue for non-monitored port