Sophos, Control Unit, models:

SG 105w SG 105 XG 105w XG 105 SG 115 SG 115w XG 115 XG 115w SG 125 SG 125w XG 125 XG 125w SG 135 SG 135w XG 135 XG 135w	Mounting Instructions
SG 125	Mounting Instructions
SG 125(w)	Quick Start Manual
SG 135(w)	Mounting Instructions
SG 450	Mounting Instructions
XG 125	Quick Start Manual
XG 125w	Quick Start Manual
XGS Series	Mounting Instructions