3Com SuperStack 3 3870 Getting Started Manual

Also see for 3CR17450-91: Datasheet Getting started guide

Contents

Physical Features 15Rear Panel The rear panel includes a standard AC power socket and a redundantpower socket, a slot for an optional expansion module, and two stackingports.Figure 3 Rear View of the Switch 3870Expansion Module SlotYou can use this slot to install a 10-Gigabit Ethernet expansion module.Contact your supplier for further information.WARNING: When an expansion module is not installed, ensure theblanking plate is fitted by tightening all screws with a suitable tool.Power SocketEach power supply automatically adjusts its power setting to any powervoltage in the range 100-240 VAC.Redundant Power System SocketTo protect against internal power supply failure, you can use this socketto connect the Switch to a SuperStack 3 Advanced Redundant PowerSystem. See “Connecting a Redundant Power Supply” on page 24.Stacking Cable PortsYou can use these ports to connect the following cables:■ Stacking Cable (3C17462) — which enables you to stack togethertwo switches up to three rack units apart.■ Resilient Stacking Cable (3C17463) — which enables you to stacktogether two switches up to sixteen rack units apart.You can stack together any combination of 3870 24-port and 48-portunits, up to a maximum of eight units.For more information on how to connect a stacking cable to your switchunits, refer to the Installation Guide that accompanies your cable.Redundant Power System SocketPower SocketStacking Cable Port (Down)Stacking Cable Port (Up)Expansion Module SlotUPDOWN