For Audio - Grandstream Networks GHP6 Series Administration Manual

Advanced
Network
Settings
Configures the refresh time (in minutes) for DNS query. If set to "0", the phone will use the DNS query TTL
DNS Refresh
from DNS server response.
Timer (m)
The default setting is 0m.
Configures the duration (in minutes) of previous DNS cache when DNS query fails. If set to "0", the feature
DNS Failure
will be disabled. Note: Only valid for SIP registration.
Cache
Duration (m)
The default setting is 0m.
IPv4 Preferred
This field specifies the IPv4 preferred DNS1 server for the user.
DNS1 Server
IPv4 Preferred
This field specifies the IPv4 preferred DNS2 server for the user.
DNS2 Server
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
Enable LLDP
physical adjacent layer 2 peer.
The default setting is "No".
Configures the interval the phone sends LLLD-MED packet.
LLDP TX
Interval (s)
The default setting is 30s.
Configures whether to enable CDP to receive and/or transmit information from/to CDP-enabled devices.
Enable CDP
The default setting is "Yes".
Defines the Layer 3 packet's QoS parameter for SIP messages in decimal pattern. This value is used for IP
Layer 3 QoS
Precedence, Diff-Serv or MPLS.
for SIP
The default setting is 26 it is equivalent to the DSCP name constant AF31.
Defines the Layer 3 packet's QoS parameter for RTP messages in decimal pattern. This value is used for IP
Layer 3 QoS
Precedence, Diff-Serv or MPLS.

for Audio

The default setting is 46 it is equivalent to the DSCP name constant EF.
Defines the Layer 3 packet's QoS parameters for H.264 messages in decimal pattern. This value is used for
Layer 3 QoS
IP Precedence, Diff-Serv or MPLS.
for Video
The default setting is 34 it is equivalent to the DSCP name constant AF41.
HTTP/HTTPS
Sets the user-agent for phonebook and screen saver.
User-Agent
SIP User-
Sets the user-agent for SIP.
Agent