&& (relation->rx_state != NOTIFY_STATE_SUSPEND)
&& (relation->rx_state != NOTIFY_STATE_HOLD))
relation->tx_state = notify_state_change(j_serial, relation->epoint_id, relation->tx_state, NOTIFY_STATE_CONFERENCE);
&& (relation->rx_state != NOTIFY_STATE_SUSPEND)
&& (relation->rx_state != NOTIFY_STATE_HOLD))
relation->tx_state = notify_state_change(j_serial, relation->epoint_id, relation->tx_state, NOTIFY_STATE_CONFERENCE);