DNS Refresh
Time (m)
Configures the refresh time (in minutes) for DNS query. If set to “0”, the phone will use DNS query TTL
resolving from DNS server response.
Cache
Duration (m)
Configures the duration (in minutes) of previous DNS cache when DNS query fails. If set to “0”, the feature
will be disabled. Note: Only valid for SIP registration.
DNS 1
Defines the preferred DNS server for the user.
DNS 2
IPV6
Preferred
DNS Server
Defines the second DNS server for the user.
Specifies the IPv6 preferred DNS server.
Enable LLDP
Enables the LLDP (Link Layer Discovery Protocol) feature on the phone system. If it is set to “Yes”, the
phone system will broadcast LLDP PDU to advertise its identity and capabilities and receive same from a
physical adjacent layer 2 peer.
The default setting is “Yes”.
LLDP TX
Interval (s)
Configures the interval the phone sends LLLD-MED packet.
The default setting is 30s.
Enable CDP
Configures whether to enable CDP to receive and/or transmit information from/to CDP-enabled devices.
The default setting is “Yes”.
Layer 3 QoS
for SIP
Defines the Layer 3 packet’s QoS parameter for SIP messages in decimal pattern. This value is used for IP
Precedence, Diff-Serv or MPLS.
The default setting is 26 it is equivalent to the DSCP name constant AF31.
Layer 3 QoS
for Audio
Defines the Layer 3 packet’s QoS parameter for RTP messages in decimal pattern. This value is used for IP
Precedence, Diff-Serv or MPLS.
The default setting is 46 it is equivalent to the DSCP name constant EF.
Layer 3 QoS
for Video
Defines the Layer 3 packet’s QoS parameters for H.264 messages in decimal pattern. This value is used for
IP Precedence, Diff-Serv or MPLS.
The default setting is 34 it is equivalent to the DSCP name constant AF41.
User-
Agent
Sets the user-agent for phonebook and screen saver.
Agent
Maximum
Transmission
Unit (MTU)
Sets the user-agent for SIP. Default is “Grandstream GXV34x0 $version”“$version” is replaced by actual
firmware version.
Configures the MTU in bytes. Please set MTU reasonably according to your needs.
Note: If MTU is set to less than 1280, IPv6 may not take effect.
PC Port
Mode
PC Port
Mode
Enables and defines the PC port mode. If it is set to “Mirrored”, the traffic in the LAN port will go through
PC port as well and packets can be captured by connecting a PC to the PC port. A reboot is required to
take effect.
The default setting is “Enabled”.