North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: T1 short-haul vs. long-haul - jack terminology
> [email protected] wrote: > I've seen where STP (shielded twisted-pair cabling) purists have > succeeded in having shielded cabling used, only to screw it up by > mis-applying the necessary grounding connections causing more > problems than they solved. I have also seen funny issues with RJ48C or RJ48X UTP, where the 7-8 pair is used for grounding. Same as STP when the shielding and/or the equipment are not properly grounded, it can be a lot of fun. Makes a real good antenna, to begin with. > At one point the vendor's rep pointed to the fine print in the > operator's manual. It stipulated that the only cabling that would > be supported between the gateway and the telco demarc was > individually shielded twisted pairs. When it was discovered that > the client had chosen to use UTP patch cords to extend their T1 > demarcs some fifteen or so feet, the vendor would not even begin > to diagnose the problem further in depth until the client replaced > those cables with shielded ones. Which emphasizes the need of having the demarc extended to the same room where the equipment is, as replacing fifteen footers is easy, when replacing a 300-ft run over ten floors is another story. > as much as it is the significance of abiding by vendor warranty > conditions (if you've agreed to them initially, even tacitly, in > your contracts and SLAs) when selecting a T1 cabling solution. Indeed. Michel.
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