UTT-901 User Manual22Configuration Explanation:Hotline Configure hot-line number of the port. With thisnumber of the port, this hot-line number will bedialed automatically as soon as off-hook and usercan's dial any other number.Call Forward Call forwarding. The default is Disable. when busyis selected, if the number dialed is engaged after thegateway has received a call, then it willautomatically transfer to the configured numberaccording to the following configuration; whenalways is selected, then the gateway will directlytransfer all the numbers that dial to this port to theconfigured numbers.Forward Number/IP/PortNumber, IP, Port configuration of call forward(CWD).