HP Model 712/100 - Workstation Technical Reference Manual page 12

System Board Interfaces
PS/2 Keyboard and Mouse Interfaces
HP Parallel Interface
RS–232 Serial Interface.
Small Computer Systems Interface (SCSI–2)
Local Area Network Interface.
LAN Adaptor
HP 28641B ThinLAN Transceiver
HP 30241A 10Base4 ThickLAN MAU
Supported AUI LAN Adapters and Devices
HP 28692A ThinLAN Hub Plus
HP 28673A 10:10 LAN Bridge
HP 28683A Fiber Optic Transceiver
Network Devices