Cabletron Systems EMM-E6 Installation Manual

Also see for Spectrum EMM-E6: User guide User guide Addendum manual

Cabletron Systems EMM-E6 Installation Manual Manual pdf 59 page image

Network RequirementsEMM-E6 Installation GuideC-5• Length: If you meet all system budgets, the maximum single modefiber optic cable length can reach 5 Km (3.1 miles) with bridges orswitches at each segment end. FOIRL specifications specify amaximum of 1 Km (0.62 miles).C.1.4 10BASE2 Coaxial Cable NetworkWhen connecting a thin coaxial cable segment to your hub (using anEPIM-C), ensure your network meets the following requirements:• Cable Type: Use only 50 ohm RG-58 A/U type coaxial cable for thincoaxial cable segments.• Length: The thin coaxial cable segment must not exceed 185 meters.• Terminators: Terminate each end of a thin coaxial cable segment.• Connectors: You can use up to 29 T-connectors throughout the lengthof the cable segment for host connections. Ensure that all connectionsare spaced 0.5 meters or more from one another or from terminators.If you use an excessive number of barrel connectors within the cablesegment (e.g., finished wall plates with BNC feed-throughs), you mayneed to reduce the number of host connections. For special networkdesign information, contact Cabletron Systems Technical Support.• Grounding: For safety, ground only one end of a thin coaxial cablesegment. Do NOT connect EPIM BNC ports to earth ground.C.1.5 Transceiver RequirementsWhen you connect an external network segment to an EPIM-A in yourhub through a transceiver, that transceiver must meet IEEE 802.3standards or Ethernet version 1.0 or 2.0 requirements. The transceivermust also have SQE disabled.Connecting a thin coaxial cable segment to earth ground atmore than one point could produce dangerous ground currents.