VG+AR2811, VG is short for voice gateway, and 2811 functions as NAT; in private network environment, VG registers at VK via 2811, and then it could dial at random.
After correct configuration, the route of VG to GK is reachable but it cannot register. Voice cannot be heard.
Release AR2811 should upgrade to VRP3.4-0010, and turn on the switch of h.323, and nat alg h.323.
AR2811 does not support nat alg functionality of h.323
If GW cannot pass the authentication at GK Server, please follow the following steps for troubleshooting:
If there is a route in between, please make sure if it supports h.323nat, and if it could ping through to GK Server.
Execute display current-configuration command to check if ras-on has taken effect; Check if GK functionality of GK Server is enabled.