3630 R5.3 E1 100-240VAC SYSTEM W SLIDER This is the 3630 19 rack-mount system complete with sliders attached for easy installation. Does not require 36SM SHELF ASSY (90-1313-02). Provides two E-1(2.048 Mb/s) links. Includes internal power supply(100-240VAC) with integral ringing generator (factory set to 25Hz, user configurable to 20Hz), common control,Universal card, display assembly and software 91X5.