Cisco WS-X4516-10GE Hardware Maintenance Manual - Page 47
Fiber Distributed Data Interface Connections, Distance Limitations for FDDI Connections - phy
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Network Connection Considerations Fiber Distributed Data Interface Connections Multimode FDDI network processor modules provide either a dual-attachment station (DAS) or a single-attachment station (SAS). Single-mode FDDI network processor modules provide a DAS. Following are the available FDDI module options: • Multimode dual-attachment • Multimode single-attachment • Single-mode dual-attachment The multimode FDDI network processor module consists of two cards, each with a multimode transceiver, with one card fitting on top of the other. The bottom card is the SAS and contains the PHY-A port. If the DAS option is included, the PHY-B port is located on the module's top card. Distance Limitations for FDDI Connections The distance limitations for single-mode and multimode FDDI stations are shown in Table 2-5. If the distance between two connected stations is greater than the maximum distance shown, significant signal loss can result. The single-mode transmitter and the multimode transceiver each provide 11 dB of optical power. Table 2-5 FDDI Maximum Transmission Distances Transceiver Type Maximum Distance Between Stations Single-mode Up to 6 miles (10 kilometers) Multimode Up to 1.2 miles (1.9 kilometers) FDDI Cable Connections The XMTR and RCVR ports of the single-mode network processor module (see Figure 2-24) use simplex FC-type connectors (see Figure 2-25). The ports accept standard 8.7 to 10/125-micron single-mode fiber-optic cable, supporting connections at distances up to 6 miles (10 kilometers). Figure 2-24 Dual-Attachment Single-Mode FDDI Module-End View PHY-B XMTR PHY-A RCVR FDDI WARNING PHY-B RING OP PHY-A RING OP AVOID EXPOSURE-INVISIBLE LASER RADIATION IS EMITTED FROM THESE APERTURES. 1300 NM CLASS 1 LASER PRODUCT LASERKLASSE 1 CISCO SYSTEMS, INC. 170 WEST TASMAN DRIVE SAN JOSE, CA 95134-1706 DATE: "Complies with FDA Radiation Performance Standards, 21 CFR, Subchapter J" Alignment groove Mounting screw locations Alignment groove H1614a Preparing for Installation 2-25