Axis 950 User Manual page 13

Section 2: Basic Installation
The Axis CD-ROM Servers have built-in termination. When using
the Axis 851 and Axis 951 CD-ROM Servers with external CD-ROM
drives, the internal termination has to be turned off, and the last drive
of the SCSI chain terminated. See also the illustrations above. For
instructions how to turn on or off the built-in termination, see
section 5.
AXIS 850/950 User's Manual 13