Grandstream GVC3200 Administration Guide - Manual (Page 39)

Firmware Version 1.0.1.5 GVC3200 Administration Guide Page 38 of 61
Presentation H.264
Profile Type
Select the H.264 profile type from "Baseline Profile", "Main Profile", "High Profile" or
"BP&MP&HP". The default setting is "BP&MP&HP". Lower profile type is easier to
decode, while higher level has higher compression ratio. For device with low CPU,
select "Baseline Profile". Also, "Baseline Profile" is likely to be used in a video
conference that has high demand for the video quality.
Presentation Video
Bit Rate
Configures the bit rate of the video. 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. The default setting depends on presentation H.264
image size.
• Presentation H.264 Image Size = 1080p, Video Bit Rate can be set to integer
value from 1024kbps to 4096kbps
• H.264 Image Size = 720p, Video Bit Rate can be set to integer value from
512kbps to 2048kbps
SRTP Mode
It is used to set if the GVC3200 system will enable the SRTP (Secured RTP) mode.
It can be selected from dropdown list:
• Disable
• Enabled but not forced
• Enabled and forced
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”. The default setting is "Enabled But Not Force".
SRTP Key Length
It is to configure all the AES (Advanced Encryption Standard) key size within SRTP.
It can be selected from dropdown list:
• AES 128&256 bit
• AES 128 bit
• AES 256 bit
If it is set to "AES 128&256 bit", the GVC3200 system will provides both AES 128
and 256 cipher suite for SRTP. If set to "AES 128 bit", it only provides 128 bit cipher
suite; if set to "AES 256 bit", it only provides 256 bit cipher suite. The default setting
is “AES 128&256 bit”.