User's Manual
GXP2130/GXP2140/GXP2160/GXP2170/GXP2135   
ADMINISTRATION GUIDE 
Page 43 of 85 
Call Forward 
Unconditionally (All)--On 
Configures  Call  Forward  All  feature  code  to  activate  unconditional  call 
forwarding. 
Call Forward 
Unconditionally (All)--Off 
Configures  Call  Forward  All  feature  code  to  deactivate  unconditional  call 
forwarding 
Call Forward Busy--On 
Configures Call Forward Busy feature code to activate busy call forwarding. 
Call Forward Busy--Off 
Configures Call Forward Busy feature code to deactivate busy call forwarding. 
Call Forward Delayed 
(No Answer)--On 
Configures  Call  Forward  Delayed  feature  code  to  activate  no  answer  call 
forwarding. 
Call Forward Delayed 
(No Answer)--Off 
Configures  Call  Forward  Delayed  feature  code  to  activate  no  answer  call 
forwarding. 
Delayed  Call  Forward 
Wait Time 
Defines the timeout (in seconds) before the call is forwarded on no answer. 
The default value is 20 seconds. The valid range is 1 to 120. 
SETTINGS PAGE DEFINITIONS 
Table 11: Settings Page Definitions 
Settings  General Settings 
Local RTP Port 
This parameter defines the local RTP port used to listen and transmit. It 
is the base RTP port for channel 0. When configured, channel 0 will use 
this port _value for RTP; channel 1 will use port_value+2 for RTP. Local 
RTP  port  ranges  from  1024 to  65400  and  must  be  even. The  default 
value is 5004. 
Use Random Port 
When set to "Yes", this parameter will force random generation of both 
the local  SIP  and  RTP ports.  This is usually  necessary when  multiple 
phones are behind the same full cone NAT. The default setting is "Yes"   
Note:This parameter must be set to "No" for Direct IP Calling to work. 
Keep-alive Interval 
Specifies how  often the phone sends  a  blank  UDP packet  to  the  SIP 
server in order to keep the "ping hole" on the NAT router to open. The 
default setting is 20 seconds. The valid range is from 10 to 160. 
Use NAT IP 
The NAT IP address used in SIP/SDP messages. This field is blank at 
the default settings. It should ONLY be used if it's required by your ITSP. 
STUN Server 
The IP address or Domain name of the STUN server. STUN resolution 
results  are  displayed  in  the  STATUS  page  of  the  Web  GUI.  Only 
non-symmetric NAT routers work with STUN. 
Public Mode 
Configures to turn on/off the public mode for hot desking feature. The 
default setting is “No”. 










