If this timeout occurs, the gateway will consider that the remote side has answered before the gateway could detect the remote ringback. The action performed in this case is to connect the call, so the condition is considered as reached. This value MUST be greater than zero and also it should be grater than the period of the ringing signal. See the tone definition file of the selected analog variant (Physical Configuration) in "$PARAXIP_INSTALL_DIR/config/tone-def".