Cisco 10720 Configuration Guide - Page 61

Chapter 3 Installing the Cisco 10720 Internet Router SONET Distance Limitations Figure 3-11 Attaching the Grounding Lug to the Router Chassis PWARCSRAXASACPRPTTIKRIHTVEERRU 57750 CONSOLE AUX RESET PSCOYOASWVRTEEDERRFMTAEISLMTPAUS AC OK DC OK OTF LINK/A1C00TCIAVMREB (DPGSF)AIL PCOAWREDRFAIL WODITROHNINTNSHEOERTPTROCEWAMEBORLVEOESN AC OK DC OK OTF INPUT 100-200- 50/60Hz 2-5A SONET Distance Limitations The maximum distance for single-mode installations is determined by the amount of light loss in the fiber path. Good quality single-mode short-reach optical cable with very few splices can carry an uplink card signal 2 km. A single-mode, intermediate-reach optical cable signal can carry an uplink card signal up to 15 km. If your environment requires the signal to travel close to the typical maximum distance, use an Optical Time Domain Reflectometer (OTDR) to measure the power loss. Caution Splicing can degrade cable performance. Note Single-mode fiber-optic cables are available from a variety of vendors. These cables are not available from Cisco Systems. Fiber Cables and Connectors For SONET/SDH single-mode fiber-optic connections, use two simplex optical cables (see Figure 3-12) or one duplex optical cable (see Figure 3-13). Warning Class 1 laser product. Statement 1008 Warning Class 1 LED product. Statement 1027 Warning Because invisible radiation may be emitted from the aperture of the port when no fiber cable is connected, avoid exposure to radiation and do not stare into open apertures. Statement 125 78-13062-10 Cisco 10720 Internet Router Installation and Configuration Guide 3-11