B&B Electronics Quatech SSP-100 User Manual page 17

Card and Socket Services Software:
In order to use the SSP-100 Enabler for DOS, the system MUST NOT be configured
with Card and Socket Services software. If a Card and Socket Services software is
installed, the Enabler may interfere with its operation and with the device(s) it controls.
For systems configured with Card and Socket Services, the SSP-100 Client Driver is the
recommended method of configuration.
DOS/Windows 3.x 2-12