Polycom EX 参考指南
Administrator’s Guide for ViewStation EX, ViewStation FX, and VS4000
A-2
www.polycom.com/videodocumentation
Predeployment Planning
Polycom recommends the following as best practices when deploying Polycom IP
voice and video applications.
voice and video applications.
❑
Determine bandwidth requirements.
Consider the total amount of
bandwidth associated with video sessions prior to deployment. It is
recommended that all H.323 video endpoints, CPSs, gateways, and MCUs be
connected to a dedicated 10/100 switched-Ethernet port.
recommended that all H.323 video endpoints, CPSs, gateways, and MCUs be
connected to a dedicated 10/100 switched-Ethernet port.
❑
Consider network requirements.
Building an end-to-end H.323 video
network requires an infrastructure based on layer 2 and layer 3 switches and
routers.
routers.
❑
Consider system requirements.
Be sure to meet the minimum server
hardware requirements of all software-based products.
❑
Consider latency, jitter, and packet loss.
All are obstacles to high quality
audio and video. The table below recommends maximum values for these
parameters.
parameters.
Parameter
Maximum recommended value
Latency
less than 150 ms one way; 300 ms end to end
Jitter
50 ms or less
Packet loss
1% or less