How do I make a cable for both a serial port and a network port?

For details, see Maintenance and Fault Management -> Maintenance Guide -> Appendix -> Preparing Cables and Connectors. 

In short: 

The wire sequence of the maintenance network port is as follows: device-side network port pins: 1/2/7/8/4; PC side network port pins 1/2/3/6/4. 

The wire sequence of the maintenance serial port is as follows: device-side network port pins: 3/6/5; PC-side network port pins 2/3/5.