subarc_left TUNNEL Config subarc_right
 
You can have a try to enable TUNNEL while the device works abnormally in the network which has some restricts. In this case, communication of the device would be in TCP protocol. If the network uses a proxy server, please config the proxy parameters.
     
TUNNEL Mode (default:inactive) Enable
  Enable standard TCP protocol(default:inactive)  
  TUNNEL server TCP listen port
  HTTP PROXY server IP address(optional)
  HTTP PROXY server TCP listen port(optional)
     
 
 
Notes:  (1) It must restart the device to take effect.
  (2) The voice delay will increase while TUNNEL is enabled.
  (3) Using standard TCP protocol will bring along more voice delay.