The messages are issued as standard custom server messages. The VOIP_Call_Transfer custom server error title and ID are shown in parameters 1 and 2 of the standard custom server errors. The error IDs have the form VOIP_XREFERnnn. The remaining parameters contain information specific to the particular error.
With any of these errors, if you have followed the suggestions in the User Response, and you are unable to solve the problem, contact IBM Support. When you call you will need details of any errors, your system setup, and details of the conditions that cause the problem. You may also require an AIX system trace taken when the problem occurs. Before taking the trace, set the -d option in the custom server. For more information on the command line options see Configuring the VOIP_Call_Transfer custom server.