Grandstream GXW42xx User Manual - Manual (Page 45)

FIRMWARE 1.0.5.8 GXW42XX USER MANUAL PAGE 43 OF 62
periodically (every 20 seconds) send a blank UDP packet (with no payload data) to the SIP
server to keep the “hole” on the NAT open.
Use NAT IP The NAT IP address used in SIP/SDP messages. It should ONLY be used if required by your
ITSP.
Proxy-Require A SIP Extension to notify the SIP server that the phone is behind a NAT/Firewall.
SIP Settings - Basic Settings
SIP transport User can select UDP or TCP or TLS. Please make sure you’re SIP Server or network
environment supports SIP over the selected transport method. Default is UDP.
SIP Registration This parameter controls whether the GXW42XX needs to send REGISTER messages to the
proxy server. The default setting is “Yes”.
Unregister on
Reboot
Default is No . If set to “Yes”, the SIP user’s registration information is cleared on reboot.
Add Auth Header
on Initial
REGISTER
Default is No. If set to “Yes”, an Authentication Header with blank nonce will be added in the
initial REGISTER.
Outgoing Calls
Without
Registration
Default is No . If set to “Yes,” user can place outgoing calls even when not registered (if
allowed by Internet Telephone Service Provider) but is unable to receive incoming calls.
Any port, member of a Hunting Group that is not registered with a SIP account, will be able to
place outbound calls using the SIP credentials of the primary Hunting Group port.
For example: Port 1, 3 and 5 are members of the same Hunting Group. Port 1 is registered
with a SIP account. Ports 3 and 5 are not registered. Ports 3 and 5 will be able to place
outbound calls using the SIP account of port 1, even if Outgoing Call without Registration is
set to No.
Register
Expiration
Allows the user to specify the time frequency (in minutes) for the GXW42XX to refresh its
registration with the specified registrar. The default interval is 60 minutes (or 1 hour). The
maximum interval is 65535 minutes (about 45 days).
SIP Registration
Failure Retry Wait
Time
Allows the user to specify the time frequency (in seconds) for the GXW42XX to re-register after
registration failure. The default interval is 20 seconds. The maximum interval is 3600seconds
(1 hour).
Reregister Before
Expiration
Determines how many seconds before the previous registration expires that the port should
reregister.