Cisco WS-X4013 Hardware Maintenance Manual - Page 89

Reading Network Processor Module LED Indicators The convention used here to indicate corresponding signals for DTE/DCE is to list DTE first. For example, Figure 4-9 shows the top LED, D0, indicates TXD in DTE mode or RXD in DCE mode. The dual serial port network processor module LED Indicators are explained in Table 4-2. Table 4-2 Dual Serial Network Processor Module LED Indicators Serial LED Card Outer Labels Indication (DTE/DCE) DO Data Out (TXD/RXD) TXC Transmit Clock DI Data In (RXD/TXD) RXC Receive Clock DCD Data Carrier Detect RS Receive Signaling TS1 Transmit Signaling TS2 Transmit Signaling LP Loop DCE Lit if network processor module is DCE FDDI Network Processor Module LED Indicators Dual-attachment FDDI network processor modules have one LED per port, located adjacent to the corresponding port on the module panel (see Figure 4-10 and Figure 4-11), while single-attachment modules have one LED, located adjacent to the single port on the module panel. (See Figure 4-12.) Figure 4-10 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 Troubleshooting the Initial Hardware Configuration 4-9