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Select TEL-URL to have the router use the SIP number
without a domain name in the SIP messages that it sends.
User Parameter Phone You can set this to Enabled or Disabled. 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 on which setting to use.
Caller ID Delivery You can set this to YES or NO. This determines whether
CID is received.
Display CID You can set this to Enabled or Disabled. This determines
whether to display Caller ID.
Timer T2 Use the drop-down menu provided to select the desired time
increment.
Initial Unregister You can set this to Enabled or Disabled. The default is
Enabled.
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 the Caller side
will initiate the session refresh. uas – specifies the Call
receiver (the “Callee”) will initiate the session refresh..