Cisco Systems UBR-3X10 manual Upstream Switch Modules, LED Name Color Description

Chapter 1 Cisco uBR-3x10 RF Switch Overview

Hardware Component Descriptions

Upstream Switch Modules

•Cisco part number 74-2622-01 (See Figure 1-5.)

There are 10 upstream switch modules used in the Cisco uBR 3x10 RF Switch. The module operates over the from 5 to 70 MHz. Each module has ten 75-ohm inputs accessed through the MCX connectors on the backpanel of the RF switch (see Figure 1-2 on page 1-3). During normal system operation, all of the upstream switches direct traffic to their respective default termination interfaces.

Note Upstream cables from the cable interface line cards are plugged into the CMTS MCX connections in the

rear of the Cisco uBR 3x10 RF Switch. See Chapter 4, “Cabling the RF Switch With the Cisco uBR10012 CMTS Cable Interface Line Cards,” for more information about cabling the RF switch.

The upstream switch module takes the signal inputs (eight) from the power splitter and routes one of the eight to a protect output, or splits the inputs into two groups of four and sets up the switches to select one input (of a group of four) as a protect output. The relays are electromechanical, latching relays that are controlled through an I2C interface. The switch card provides a minimum of 60 dB of isolation from connector port to connector port during normal operation and more than 20 dB when operating in protect mode.

Figure 1-5 Upstream Switch Card

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Captive screwCaptive screw

Each upstream switch has a set of four LEDs that indicate the working status of the port as described in Table 1-2.

	Table 1-2	Upstream Switch Board LED Descriptions
	LED Name	Color		Description
	Protect 1	Green/Yellow		Indicates CMTS/PROTECT 1
	Protect 2	Green/ Yellow		Indicates CABLE PLANT/PROTECT 2
	Error 1	Off/Yellow		Indicates a channel problem 1
	Error 2	Off/Yellow		Indicates a channel problem 2
			Cisco uBR-3x10 RF Switch Hardware Installation and Cabling Guide
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