User's Manual
FIRMWARE VERSION 1.0.0.2     GXW42XX USER MANUAL      Page 38 of 52 
 DNS Mode 
One from the 3 modes available for “DNS Mode” configuration: 
-A Record (for resolving IP Address of target according to domain name) 
-SRV (DNS SRV resource records indicates how to find services for various protocols) 
-NAPTR/SRV (Naming Authority Pointer according to RFC 2915) 
One mode can be chosen for the client to look up server. 
The default value is “A Record” 
Tel URI 
The default setting is “Disabled”. If the phone has an assigned PSTN 
Number, this field should be set to “User=Phone” then a 
“User=Phone” parameter will be attached to the “From header” in the SIP 
request to indicate the E.164 number. If server supports TEL URI format, then this option 
needs to be selected. 
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.
Outgoing Call 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). 
Local SIP port 
Defines the local SIP port the GXW42XX will listen and transmit. The default value for 
Profile 1 is 5060 and 6060 for Profile 2. 
Local RTP Port 
Defines the local RTP-RTCP port pair the GXW42XX will listen and transmit. It is the 
base RTP port for channel 0. When configured, channel 0 will use this port _value for 
RTP and the port_value+1 for its RTCP; channel 1 will use port_value+2 for RTP, 
port_value+3 for its RTCP and so on. The default value for Profile 1 is 5004 and 6004 for 
Profile 2. 










