Grandstream Networks GSC3516 User Manual page 28

SRTP Mode
SRTP Key Length
Crypto Life Time
RTCP Destination
RTCP Keep-Alive method
RTP Keep-Alive method
Symmetric RTP
RTP IP Filter
Accounts/Call Settings
Play warning tone for Auto
Answer Intercom
Send Anonymous
RTP Settings
Sets if the device will enable the SRTP (Secured RTP) mode. It can be selected from dropdown list:
● No
● Enabled but not forced
● Enabled and forced
● Optional
The default setting is "No".
Configures all the AES (Advanced Encryption Standard) key size within SRTP. It can be selected from
dropdown list:
● AES128&256 bit
● AES 128 bit
● AES 256 bit
If it is set to "AES 128&256 bit", the device will provide both AES 128 and 256 cipher suites 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 "AES128&256 bit".
Configures whether to enable Crypto Life Time. Default is "Disabled"
Configures a remote server URI where RTCP messages will be sent to during an active call.
Configures the RTCP channel keep-alive packet type:
● If set to "Receiver Report", the RTCP channel will sends "receiver report+source description+RTCP
extension" as keep-alive dataReceiver Report
● If set to "Sender report", the RTCP channel will sends "Sender report+source description+ RTCP
extension" as keep-alive data.
Default is "Receiver Report"
Configures the RTP channel keep-alive packet type..
● If set to "No", no data will be sent
● If set to "RTP version 1", the wrong version infor "1" will be carried when sending RTP data packets
Defaut is "RTP Version 1"
Configures if the device enables the symmetric RTP mechanism.
If it is set to "Yes", the device will use the same socket/port for sending and receiving the RTP messages.
The default setting is "No".
Receives the RTP packets from the specified IP address and Port by communication protocol. If it is set to "IP
Only", the device only receives the RTP packets from the specified IP address based on the communication
protocol; If it is set to "IP and Port", the device will receive the RTP packets from the specified IP address
with the specified port based on the communication protocol.
The default setting is "Disable".
Accounts – Codec Settings page
When this option is enabled, the device will play a warning tone When auto-answering intercom. The
default setting is "yes".
If set to "Yes", the "From" header in outgoing INVITE messages will be set to anonymous, essentially
General