These recommended network guidelines are intended to allow you to obtain the best experience when accessing the Easymeeting services. Video performance and quality of experience is directly related to network performance, should a network link be unreliable or give intermittent performance, this can have the same impact on your video experience.
Minimum bandwidth requirements for Standard Definition (SD) video conferencing, including PC, Mac, and Mobile: 384kbps
Recommended bandwidth requirements for Standard Definition (SD) video conferencing, including PC, Mac, and Mobile : 768kbps
Minimum bandwidth requirements for High Definition (HD) video conferencing, including PC, Mac, and Mobile: 1024kbps
- Recommended bandwidth requirements for High Definition (HD) video conferencing, including PC, Mac, and Mobile: 1536kbps
Packet loss should be less than 1%. Anything higher will result in pixelated images within the video call; “video artifacts” as we like to call them. 1% is noticeable while 5% is intolerable.
NETWORK DUPLEX MODE
Set the switchport and the video conference system to full duplex. Duplex mismatch is the number one cause of packet loss and video freezing.
Intermediate routers may prioritize the video and audio packet sizes differently, creating differing transit times. In severe cases, audio and video packets become out of sync, resulting in video motion not “lining up” with audio spoken in a video call.
The term 'jitter' refers to the variation in timing of the picture as packets are received, buffered, and distributed to the screen as the available bandwidth changes. An increase in jitter caused by an underpowered network connection can cause “skipping” or “freezing” of a picture. It is recommended to have jitter below 20 milliseconds.
QUALITY OF SERVICE
Quality of Service (QoS) maps or tags certain traffic with varying degrees of priority. If you wish to implement QoS for the voice and video applications with your network, please ensure they are tagged for the highest priority configurable. Please be aware that QoS doesn’t work over the public Internet to the Easymeeting services.
APPLICATION LAYER GATEWAY, H.323 PROXY OR OTHER “FIREWALL-HELPERS“
Most firewalls have an application filter making H.323 easier to work with and they all go by different names, depending on the vendor. In most environments, it’s HIGHLY recommended they are disabled.