There is a timing consideration if running half duplex, the guard interval will not be sufficient if the cable distance is > 100 meters.
You may be able to go a little farther than 100 meters on cable with excellent attenuation and crosstalk characteristics (e.g. Cat6) if using full duplex. From: AF <[email protected]> On Behalf Of Jesse DuPont Sent: Monday, January 14, 2019 5:12 PM To: AnimalFarm Microwave Users Group <[email protected]>; [email protected] Subject: Re: [AFMUG] Ethernet 100M Copper Limit Well, I meant Ethernet generically. Regardless of 4-wire vs 8-wire, in general, the purported safe distance for an Ethernet over copper (as opposed to fiber) connection is 100 meters. What drives this safe distance limitation spec? Jesse DuPont Network Architect email: [email protected] <mailto:[email protected]> Celerity Networks LLC Celerity Broadband LLC Like us! facebook.com/celeritynetworksllc Like us! facebook.com/celeritybroadband On 1/14/19 4:03 PM, [email protected] <mailto:[email protected]> wrote: I presume you are talking about 4 wire Ethernet because we do GigE all the time on copper. GigE uses all 8 wires and has data flowing both directions. 100 Mbps E uses 4 wires (2 pair) with TX on one pair and RX on the other pair. GigE uses advanced modulation methods as well. Does that help? From: Jesse DuPont Sent: Monday, January 14, 2019 3:58 PM To: AnimalFarm Microwave Users Group Subject: [AFMUG] Ethernet 100M Copper Limit I figured this was the best place to ask this question: What is the primary reason for the 100M limit on copper Ethernet links? Is it related to bit errors/SNR or is there a timing element involved? Something else? Thanks! -- Jesse DuPont Network Architect email: [email protected] <mailto:[email protected]> Celerity Networks LLC Celerity Broadband LLC Like us! facebook.com/celeritynetworksllc Like us! facebook.com/celeritybroadband _____ -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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