Account/Sip Settings - Grandstream Networks WP820 Administration Manual

NAT Traversal
Specifies which NAT traversal mechanism will be enabled on the phone. It can be
selected from the dropdown list:
If the outbound proxy is configured and used, it can be set to "NAT NO".
If set to "STUN" and STUN server is configured, the phone will periodically send
STUN message to the SUTN server to get the public IP address of its NAT
environment and keep the NAT port open. STUN will not work if the NAT is
symmetric type.
If set to "Keep-alive", the phone will send the STUN packets to maintain the
connection that is first established during registration of the phone. The
"Keep-alive" packets will fool the NAT device into keeping the connection open
and this allows the host server to send SIP requests directly to the registered
phone.
If it needs to use OpenVPN to connect host server, it needs to set it to
"OpenVPN". The default setting is "NAT NO".
Proxy-Require
Adds the Proxy-Required header in the SIP message. It is used to indicate
proxy-sensitive features that must be supported by the proxy. Do not configure
this parameter unless this feature is supported on the SIP server.

Account/SIP Settings

SIP Basic Settings
SIP Registration
Allows the phone to send SIP REGISTER messages to the proxy/server.
The default setting is "Yes".
Unregister before Controls whether to clear SIP user's information by sending un-register request to
New Registration the proxy server. When set to "All", the un-registration is performed by sending a
REGISTER message with "Contact" header set to * and Expires=0 parameters to
the SIP server when the phone starts pre-registration after rebooting. If set to
"Instance", the phone only cleans the current SIP user's info by sending
REGISTER message with "Contact" header set to concerned SIP user's info and
Expires=0 parameters to the SIP server. The default setting is "Instance".
Register Expiration
Configures the time period (in minutes) in which the phone refreshes its
(m)
registration with the specified registrar. The default setting is 60. The maximum
value is 64800 (about 45 days).
•
NAT NO
•
STUN
•
Keep-alive
•
Auto
•
OpenVPN
WP820 Administration Guide
Version 1.0.1.15
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