Administration Guide
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WP820 Administration Guide
Version 1.0.5.5
Use H.264
Constrained Profiles
Configures that whether to set H.264 constrained profiles to use H.264 CBP to
establish video call with WebRTC. The function takes effect when H.264 profile
setting includes BP type. It is recommended to set to "Yes" when establishing
video call with WebRTC
The default setting is “No”.
Video Bit Rate
Configures the bit rate for video stream received on the WP820. The default setting
is 2048 kbps. The valid range is from 32 – 2048 kbps.
Note: The video bit rate can be adjusted based on the network environment.
Increasing the video bit rate may improve video quality if the bandwidth is
permitted. If the bandwidth is not permitted, the video quality will decrease due to
packet loss. For some network environment, the default setting “720P” might be
too high that causes no video or video quality issue during video call to WP820. In
this case, please change “H.264 Image Size” to “VGA” or “CIF” and change “Video
Bit Rate” to “384kbps” or lower.
SDP Bandwidth
Attribute
Sets the SDP bandwidth attribute. It can be selected from the drop-down list. The
default setting is “Media Level”.
• Standard: use AS format in session level; use TIAS format in media level
• Media Level: use AS format in media level.
• Session Level: use AS format in session level.
• None: no modifications in the session format.
Note: Please do not modify this setting without knowing the session format
supported by the server. Otherwise, it might cause video decoding failure.
RTP Settings
SRTP Mode
Sets if the phone will enable the SRTP (Secured RTP) mode. It can be selected
from dropdown list:
• Disable
• Enabled but not forced
• Enabled and forced
The default setting is “Disable”.
SRTP uses encryption and authentication to minimize the risk of denial of service.
(DoS). If the server allows to use both RTP and SRTP, it should be configured as
“Enabled but not forced”.
It uses SDP security description to exchange key. Please refer to:
SDES: https://tools.ietf.org/html/rfc4568
SRTP: https://tools.ietf.org/html/rfc3711