GPS  
This menu allows users to enable and disable GPS function in the modem. 
 
Enable GPS:Enable or disable GPS function  
GPS Output Interface:This item selects the GPS output interface including network and serial 
port  
Protocol:TCP mode or UDP mode 
GPS Centre Address:The GPS centre’s IP Address or domain name  
GPS Centre Listening Port:The GPS centre’s listening port.  
GPS Information Update Interval:The time interval between two GPS information update, unit 
is second