Cabletron Systems EMM-E6 Ethernet manual Thin-net Network, Transceiver Requirements

CHAPTER 2: REQUIREMENTS / CONFIGURATIONS

2.1.4Thin-net Network

When connecting a thin-net (coaxial) segment to your hub (via an EPIM-C), ensure your network meets the following requirements:

•Cable Type - Use only 50 ohm RG-58A/U type coaxial cable for thin-net cable segments.

•Length - The thin-net segment must not exceed 185 meters.

•Terminators - Terminate each end of a thin-net segment.

•Connectors - You can use up to 29 T-connectors throughout the length of the cable segment for host connections.

If you use an excessive number of barrel connectors within the cable segment (e.g., finished wall plates with BNC feed-throughs), you may need to reduce the number of host connections. For special network design, contact Cabletron Systems Technical Support.

•Grounding - For safety, ground only one end of a thin-net segment. Do NOT connect EPIM BNC ports to earth ground.

Connecting a thin-net segment to earth ground at more than one point could produce dangerous ground currents.

2.2TRANSCEIVER REQUIREMENTS

When you connect an external network segment to an EPIM-A in your hub through a transceiver, that transceiver must meet IEEE 802.3 standards or Ethernet version 1.0 or 2.0 requirements. The transceiver must also have SQE disabled.

2-6 EMM-E6 User’s Guide