Ethernet Cabling RequirementsCSX400 and CSX400-DC User’s Guide 53Length — If your network meets all system budgets, the maximum single mode fiber optic cablelength can reach 5 km (3.1 miles) with bridges or switches at each segment end. The FOIRLspecifies a maximum of 1 km (0.62 miles).10BASE2 Coaxial Cable NetworkWhen connecting a thin coaxial cable segment to the CSX400 (using an EPIM-C), ensure that yournetwork meets the following requirements:Cable Type — Use only 50-ohm RG 58A/U type coaxial cable for thin coaxial 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 length of the cable segment forhost connections. Ensure that all connections are spaced 0.5 meters or more from one another orfrom terminators.If you use an excessive number of barrel connectors within the cable segment (e.g., finished wallplates with BNC feed-throughs), you may need to reduce the number of host connections. Forspecial network design information, contact Cabletron Systems Technical Support.Grounding — For safety, ground only one end of a thin coaxial cable segment. Do NOT connectEPIM BNC ports to earth ground.Transceiver RequirementsWhen you connect an external network segment to an EPIM-A in your CSX400 through atransceiver, that transceiver must meet IEEE 802.3 standards or Ethernet version 1.0 or 2.0requirements. The transceiver must also have SQE disabled.!CAUTIONConnecting a thin coaxial cable segment to earth ground at more than one point couldproduce dangerous ground currents.
