Installation guide

Overview
24 FTTH Application Guide
VLANs for the data, video and voice services
In most networks the voice and video traffic will be separated from data and
management traffic in some way, most often with the use of VLANs. Video
will be on its own VLAN and voice on its own VLAN. One of the benefits of
segregating traffic type by VLAN is securing known traffic. For example,
data traffic coming from the public Internet could have originated anywhere
and we want to keep that traffic separate from known good traffic that
originated inside of the service provider's network such as video traffic which
originates from the provider's head end and voice traffic which originates,
most likely, from the service provider's soft switch. So separating the video
traffic into its own VLAN and voice traffic in its own VLAN means that we
can be sure the known traffic is separated out from any unknown traffic.
Figure 3: The zNID supports triple play connected to upstream services