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 57 page image

Network RequirementsEMM-E6 Installation GuideC-3• Temperature: Multi-pair PVC 24 AWG telephone cables typicallyhave an attenuation of approximately 8-10 dB/100 m at 20°C (68°F).The attenuation of PVC insulated cable varies significantly withtemperature. At temperatures greater than 40°C (104°F), we stronglyrecommend using plenum-rated cable to ensure attenuation remainswithin specification.C.1.2 Multimode Fiber Optic NetworkWhen connecting a multimode fiber optic link segment to the EMM-E6(using an EPIM-F1/F2), ensure the network meets the followingrequirements:• Cable Type: Use the following multimode fiber optic media:- 50/125 μm fiber optic cabling- 62.5/125 μm fiber optic cabling- 100/140 μm fiber optic cabling• Attenuation: You must test the fiber optic cable with a fiber opticattenuation test set adjusted for an 850 nm wavelength. This testverifies that the signal loss in a cable falls within the followingacceptable levels:- 13.0 dB or less for a 50/125 μm fiber cable segment- 16.0 dB or less for a 62.5/125 μm fiber cable segment- 19.0 dB or less for a 100/140 μm fiber cable segment• Budget and Propagation Delay: When you determine the maximumfiber optic cable length to incorporate fiber runs into your network, youmust calculate and consider the fiber optic budget (a total loss of10.0 dB or less is permissible between stations) and total networkpropagation delay.To determine the fiber optic budget, combine the optical loss due tothe fiber optic cable, in-line splices, and fiber optic connectors.Typical loss for a splice and connector (together) equals 1 dB or less.