Mode-Conditioning Patch Cord Description

Chapter 2 Rack-Mounting, Tabletop Installation, and Cabling

Connecting I/O Cables

Figure 2-13 GBIC Port Connections

1	5	6
		6

57580

1	To external 1000BASEX network	5	TX (GE port 0)

2	1 duplex connector (TX and RX)	6	RX (GE port 0)

3	To external 1000BASEX network	7	GE port 1

4	2 simplex connectors

Step 1 Remove the plug from the GBIC so that you can insert the cables. Keep the plug for use should you ever disconnect the optical fiber cables.

Warning Because invisible laser radiation may be emitted from the aperture of the port when no fiber cable is connected, avoid exposure to laser radiation and do not stare into open apertures.

Step 2 Attach the appropriate optical fiber cable directly to the SC-type receptacle on the GBIC. You can use either simplex or duplex connectors for most devices. (Figure 2-13shows a GBIC installed in GE port 0.)

•For simplex connectors, two cables are required, one cable for transmit (TX) and a second cable for receive (RX).

•For duplex connectors, only one cable that has both TX and RX connectors is required.

Amode-conditioning patch cord can be used with the GBIC-LX/LH or WS-G5486 to allow reliable laser transmission between the single-mode laser source on the GBIC and a multimode optical fiber cable. See the “Attaching the Mode-Conditioning Patch Cord” section on page 2-21for installation instructions.