Grandstream Networks, Inc.
GXP2124 User Manual
Page
42 of 50
Firmware version: 1.0.3.19 Last Updated: 03/2012
refreshes its registration with the specified registrar. The default interval is 60
minutes. The maximum interval is 65,535 minutes (about 45 days).
Reregister Before
Expiration
This parameter allows user to specify the time frequency (in seconds) that GXP2124
sends out a re-registration request before the Register Expiration. By default is 0
second.
Local SIP Port
This parameter defines the local SIP port used to listen and transmit. The default
value for Account X is:
- Account 1: 5060
- Account 2: 5062
- Account 3: 5064
- Account 4: 5066
SIP Registration
Failure Retry Wait
Time
Retry registration if the process failed. Default is 20 seconds.
SIP T1 Timeout
RFC 3261 SIP T1 timer. Default is 0.5 second.
SIP T2 Interval
RFC 3261 SIP T2 timer. Default is 4 seconds.
SIP Transport
Choose SIP Transport between UDP, TCP and TLS/TCP. Default is UDP.
SIP URI Scheme
when using TLS
When TLS/TCP is used (in “SIP Transport”), select “sip:” or “sips:” in this mode.
Default is “sips:”.
Use Actual
Ephemeral Port in
Contact with
TCP/TLS
Enable to use actual ephemeral port in contact with TCP/TLS. Default is “No”.
Check Domain
Certificate
Enable to check the domain certificate. Default is “No”.
Remove OBP from
Route
The SIP Extension notifies the SIP server that it is behind a NAT/firewall.
Validate Incoming
Messages
This configuration selects whether or not the incoming messages should be validated.
Support SIP
Instance ID
Selects whether or not SIP Instance ID is supported.
NAT Traversal
This parameter activates the NAT traversal mechanism. It has options: No, STUN,
Keep-Alive, UPnP, Auto, VPN.
If selecting STUN and a STUN server is also specified, the phone performs according
to the STUN client specification. Using this mode, the embedded STUN client detects
if and what type of NAT/Firewall configuration is used. If the detected NAT is a Full
Cone, Restricted Cone, or a Port-Restricted Cone, the phone will use its mapped
public IP address and port in all of its SIP and SDP messages.
If selecting Keep-Alive with no specified STUN server, the GXP2124 will periodically
(every 20 seconds or so) send a blank UDP packet (with no payload data) to the SIP