D-Link DPH-300S User Manual page 30

Configuration
Initial Unregister – You can set this to phone or none. This
determines whether or not the phone number is appended to the
information forwarded to your SIP server. Your VoIP service
provider will instruct you which setting to use.
Port – Enter the SIP server's listening port for the SIP in this field.
Leave this field set to the default if your VoIP service provider did not
give you a server port number for SIP.
Service Domain Enter the SIP service domain name in this field.
Register Expiration – Use this field to set how long the router will
wait before sending a repeat registration request if a registration
attempt fails or there is no response from the registration server.
Session Expires -This field will set the longest time that the router
will allow a SIP session to remain idle (without traffic) before
dropping it.
Min-SE – When two SIP devices negotiate a SIP session, they must
negotiate a common expiration time for idle SIP sessions. this field
sets the shortest expiration time that the router will accept. The
router checks the session expiration values of incoming SIP INVITE
requests against the minimum session expiration value that you
enter here. If the session expiration of an incoming INVITE request
is less than this value, the router negotiates with the other SIP device
to increase the session expiration value to match the minimum
session expiration value.
Session Expires Refresher - This determines which side of an
expired call session will initiate the session refresh. uac – specifies
D-Link DPH-300S User Manual 30