Insertion rating of various brands of CAT6 jacks?
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Posted by Peter Grandi on March 4, 2007, 12:47 pm
Please log in for more thread options So, I have been looking at the specs for some branded CAT6 jacks and they rarely mention for how many inserts the jack is rated (also called ''plug insertion life'') and the few that state it state more than 750 (some more than 1000) insertions. Experience tells me that 750 and 1000 are very optimistic numbers. What kind of CAT6 jacks are more reliable and have longer lives than others? I'd like to hear experiences and opinions. | |||||||||||||||||||
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Posted by Robert Redelmeier on March 4, 2007, 1:13 pm
Please log in for more thread options I believe the mfr numbers, but I also believe they're rated under ideal conditions. Particularly with excellent plugs carefully inserted on-axis. In the wild, like a college campus, neither the good plugs nor the careful users are likely to be present. Either bolt-down patchcords or leave jacks naked. Either way, you'll be doing replacement. I think the patchcords less often (yearly vs quarterly). -- Robert | |||||||||||||||||||
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Posted by Peter Grandi on March 7, 2007, 9:34 am
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[ ... ] >> Experience tells me that 750 and 1000 are very optimistic
>> numbers. What kind of CAT6 jacks are more reliable and have >> longer lives than others? I'd like to hear experiences and >> opinions. [ ... ] redelm> In the wild, like a college campus, neither the good
redelm> plugs nor the careful users are likely to be present. redelm> Either bolt-down patchcords or leave jacks naked. redelm> Either way, you'll be doing replacement. I think the redelm> patchcords less often (yearly vs quarterly). Ah yes, I am doing replacement, just trying to think of way of minimizing the frequency. I am doing something like "patchcords", which is ''sacrificial'' little switches in the areas with the highest damage rate. I also suspect that some of the sockets have not been well installed and the CAT6 cable is makes sharp bends inside the box, which does not help... | |||||||||||||||||||
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Posted by Dmitri(Cabling-Design.com on March 8, 2007, 11:01 am
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Peter Grandi wrote: > So, I have been looking at the specs for some branded CAT6 jacks
> and they rarely mention for how many inserts the jack is rated > (also called ''plug insertion life'') and the few that state it > state more than 750 (some more than 1000) insertions. > Experience tells me that 750 and 1000 are very optimistic
> numbers. What kind of CAT6 jacks are more reliable and have > longer lives than others? I'd like to hear experiences and > opinions. 750 insertions is actually the least number that I've seen in the specs in the longest time. I don't think it's overly optimistic. In fact, RJ connectors of cable certifying tools' cords get well in excess of 2000 re-matings easily in the course of testing a large enough site and I've seen them perform OK (but not great) after such abuse. The actual number depends on thickness of gold plating layer and brand name ones definitely get better gold plating. On top of that I personally think that those jacks that the manufacturers are pitching as Power-over-Ethernet certified might get a thicker layer yet due to higher currents they suppose to withstand. I can think you Hubbell CAT6 as one example of PoE-certified jacks. You should be able to locate more -- Best Regards, Dmitri Abaimov, RCDD http://www.cabling-design.com/ Home Cabling Guide, Cabling Forum, color codes, pinouts and other useful resources for premises cabling users and pros -- +----------------------------------------------------------+ | http://forums.cabling-design.com/ | | *** a better way to USENET *** | | no-spam Web and RSS interface to your favorite newsgroup | | comp.dcom.cabling - 3152 messages and counting! | +----------------------------------------------------------+ | |||||||||||||||||||
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Posted by CablingGuy on March 8, 2007, 12:08 pm
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Dmitri(Cabling-Design.com) skrev: > Peter Grandi wrote:
> > > > >> So, I have been looking at the specs for some branded CAT6 jacks
>> and they rarely mention for how many inserts the jack is rated >> (also called ''plug insertion life'') and the few that state it >> state more than 750 (some more than 1000) insertions. >
>> Experience tells me that 750 and 1000 are very optimistic
>> numbers. What kind of CAT6 jacks are more reliable and have >> longer lives than others? I'd like to hear experiences and >> opinions. >
Correct, the 750 insertions is the minimum requirements from the
> 750 insertions is actually the least number that I've seen in the specs in > the longest time. I don't think it's overly optimistic. In fact, RJ > connectors of cable certifying tools' cords get well in excess of 2000 > re-matings easily in the course of testing a large enough site and I've > seen them perform OK (but not great) after such abuse. > connector standard. > The actual number depends on thickness of gold plating layer and brand
> name ones definitely get better gold plating. Correct > On top of that I personally
> think that those jacks that the manufacturers are pitching as > Power-over-Ethernet certified might get a thicker layer yet due to higher > currents they suppose to withstand. Here you are wrong, all jacks meeting the IEC standards for Cat5E or higher must support PoE, so PoE certified jacks are only marketing and has nothing to do with technical requirements. The cabling groups from TIA and ISO/IEC is together with IEEE working on the requirements for PoE Plus (PoEP), here there are some indications that unmating under load might stress the connectors, this might result in additional requirements in the component standards. -- The CablingGuy | |||||||||||||||||||
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> numbers. What kind of CAT6 jacks are more reliable and have longer
> lives than others? I'd like to hear experiences and opinions.