The Indoor Unit (IDU) Chapter 1WinLink™ 1000 User Manual Release 1.9 1-10.Figure 1-12: IDU-E-AL with Alarms portIDU-RThe IDU-R is a compact, half 19 inch, 1U plastic unit for 1 x T1/E1 backup,providing in addition 2 Ethernet ports and an external alarms interface. TheIDU-R is an indoor unit used for automatic backup of leased lines. The IDU-R monitors the status of leased lines, and in the event of a connection fail-ure automatically switches to the radio link. You may choose which of thetwo links is the main link and which is the backup link. The IDU-R may beconfigured for multi-hop (see Appendix L).Figure 1-13: IDU-R Rear PanelFigure 1-14: Backup link for E1/T1 connectionsIDU-CThe IDU-C is a carrier-class 19 inch, 1U unit, providing E1/T1 ports,Ethernet ports, dry contact alarms and indication LEDs. It has twoDC power feed connectors. An AC to DC converter is available forpowering the IDU-C from an AC source. The IDU-C is designed tobe rack mounted.
