By default, Wanware is a physical DTE device. DCE cables are also available.
On a two port SGP, the upper port (the one furthest from the PC motherboard) is link 0 and the lower one is link 1. On a four port SGP, the fanout cable has the link numbers labelled at the connectors.Available Electrical Interfaces include V.35, RS-232, RS-422, RS-530 and X.21
Refer to the synchronous serial cable pinout to make your own cables.