During a call press the button on the phone or the transfer softkey. The caller will be placed on hold.
Enter the desired number, press a line/programmable button with a speed dial on it or press the softkey for contacts. The phone will automatically dial the entered number.
To transfer the call either press again or press the soft key for done. This can be done immediately after dialing or after a brief conversation with the person you are transferring to.
If you have made a mistake in dialing the person to transfer to and wish to go back press the softkey for hang up. This will resume the call with the original person.