Grandstream Networks DP720 Administration Manual page 44

Network Settings – Advanced Settings
Enable Activates LLDP (Link Layer Discovery Protocol). Default is Yes.
LLDP
Layer 2 Layer 2 QoS
QoS 802.1Q/VLAN
Settings Tag
Layer 2 QoS
802.1p Priority
Value for SIP
signaling
Layer 2 QoS
802.1p Priority
Value for RTP
media
STUN Use STUN
Settings
STUN server
Number of
STUN
Response
Misses
Allowed
Keep-Alive
Interval
Ring Tones
System Ring Sets ring cadences for all incoming calls.
Cadence Syntax: c=on1/off1-on2/off2-on3/off3;) Default is set to c=2000/4000; (US standards)
on1 is the period of ringing ("On time" in "ms") while off1 is the period of silence. Up to three
cadences are supported.
Configures tone frequencies according to user preference. By default, the tones are set to North
Call Progress
Tones American frequencies. Frequencies should be configured with known values to avoid
uncomfortable high pitch sounds. ON is the period of ringing ("On time" in "ms") while OFF is the
period of silence. In order to set a continuous ring, OFF should be zero. Otherwise it will ring ON
ms and a pause of OFF ms and then repeats the pattern.
Sets layer 2 QoS 802.1Q/VLAN tag. Default is 0.
Sets layer 2 QoS 802.1p priority value for SIP signaling.
Default is 0.
Sets layer 2 QoS 802.1p priority value for RTP media.
Default is 0.
Enables STUN. Default is No.
Configures IP address or domain name of STUN server. Only non-symmetric NAT
routers work with STUN.
Specifies number of STUN response misses allowed before restarting DHCP service.
The minimum is 3 misses.
Sends periodically a blank UDP packet to SIP server in order to keep the "ping hole"
on the NAT router open.
Default is 20 seconds.
DP750/DP720 Administration Guide
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