Cabletron Systems CyberSWITCH CSX400 Installation Manual

Also see for CyberSWITCH CSX400: Setup guide Configuration guide User guide User guide User guide

Contents

Chapter 3: Ethernet Cabling Requirements3-4CyberSWITCH CSX400 and CSX400-DC Installation GuideSingle Mode Fiber Optic NetworkWhen connecting a single mode fiber optic link segment to the CSX400 (using an EPIM-F3),ensure that the network meets the following requirements:Cable Type — Fiber optic link segments should consist of 8/125 or 12/125 μm single mode fiberoptic cabling. You can also use 62.5/125 μm multimode cable with the EPIM-F3; however,multimode cable allows for greater optical loss, and limits the possible distance to 2 km.Attenuation — Test the fiber optic cable with a fiber optic attenuation test set adjusted for a1300 nm wavelength. This test verifies that the signal loss in a cable falls within the acceptablelevel of 10.0 dB or less for any given single mode fiber optic link.Budget and Propagation Delay — When you determine a maximum fiber optic cable length,you must calculate and consider the fiber optic budget (a total loss of 10.0 dB or less betweenstations) and total network propagation delay.To determine the fiber optic budget, combine the optical loss due to the fiber optic cable, in-linesplices, and fiber optic connectors. Typical loss for a splice and connector (together) equals 1 dBor less.Network propagation delay is the amount of time it takes a packet to travel from the sending deviceto the receiving device. Total propagation delay for the entire network must not exceed 25.6 μs inone direction (51.2 μs round trip). If the total propagation delay exceeds 25.6 μs, you must usebridges or switches to re-time the signal.Length — 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.