3Com 3CB9LF20R Installation Guide - Page 3

70-km Gigabit Ethernet GBIC Transceiver Installation Guide 3 WARNING: The fiber optic lasers used in 3Com GBIC ports meet the regulatory requirements for casual exposure to the eye. As with any source of bright light, however, 3Com recommends that you do not look into the laser light source. FDA Class 1 Laser Device This product complies with U.S. Department of Health and Human Services Rules 21 CFR Subchapter J applicable at date of manufacture. CLASS 1 LASER PRODUCT IEC 825, Class 1 Laser Devices are for connection only to Class 1 Laser Devices. Multimode and single-mode fiber optic interfaces use lasers. Inserting the Transceiver Before you connect the system to the Gigabit Ethernet network, first insert the transceiver into the GBIC port on the system, as described in this section. The procedure is similar for all relevant CoreBuilder® chassis. To ensure optimal performance, compatibility, and regulatory compliance, use only GBIC transceivers that 3Com supports. For a list of GBIC devices that are qualified for the CoreBuilder 3500, 9000, and 9400, see this 3Com Web site: http://www.3com.com/gigabit_ethernet/gbics 1 Read and follow the instructions in "Safety Precautions" earlier in this guide. 2 Orient the transceiver so that the duplex SC connector is toward you. CAUTION: GBIC transceivers are keyed and can be properly inserted only one way. If the transceiver does not click when you insert it, turn it over and reinsert it. a Figure 2 shows how to insert the transceiver into a CoreBuilder 3500 GBIC port. b Figure 3 shows how to insert the transceiver into a GBIC port on the CoreBuilder 9000 7-slot chassis. Installation in the 8-slot and 16-slot chassis is the same except that the chassis ports are oriented vertically.