Recent content by Jtodd

Simple answer is that Cat6, as you said is the standard that will do 10gbe to 37m (or there abouts), and Cat6A is the standard for cable to do 10gbe at 100m. Cat6(e,E,+,anything else) is marketing ploy. There are differing qualities of both 6 and 6A that will be different amounts above the...

The need for attenuators will depend on the output strength and receive sensitivity of your transceivers. Gotta read the spec on them and do the math (output - cable loss = receive specs). If you're talking just media converters at either end, SM aren't that much more expensive than multimode...

Patching from 50m to 62.5m will work. You'll have little to no loss when the transmitting direction is going from 50 to 62.5. But when the transmitting direction is 62.5 to 50, you have up to 9db of loss, depending on many factors of both cable types. The length will be your over all biggest...

Ooops, forgot...I wouldn't put anything less that 12 strands, maybe even 24. Justin T. Clausen Physical Layer Implementation California State University, Monterey Bay

When deciding on what fiber to use, what are your network speeds? If you're even close to going over 1G on your fiber link, you'd have to look at Laser Optimized 50 micron. But low end LO 50 is limited to 300m for 10G (obviously longer for 1G). But LO 50 glass is more expensive than single...

To piggy back on to what mikeydidit said, fill ratio's, while effect future pulls and such, is all about the firestopping. But as to the fiber, we stopped spec'ing inderduct and fiber and have started using armored fiber without inderduct (this is for indoor riser or horizontal runs). In...

nknook, Perfect, thank you! Any suggestions where there might be a spec sheet? Justin Justin T. Clausen Physical Layer Implementation California State University, Monterey Bay

Just to add a few thoughts: I would rethink the 10G uplink. I'm on a state university campus and we're not even considering 10G uplinks, even between Cores. At most we're doing double 1G uplinks. So for construction site trailer's, that might be a bit of over kill. If this were a shorter...

Hello All, I'm looking for information about the TN570A/B/C expansion interface units for the DEFINITY system (G3). I'm mostly interested in the specs on the fiber transceivers themselves. I've plowed through the web to no avail. The Avaya support pages was even less help. I'm looking for...

dagwood- From the 10th ED. of the BICSI RCDD: Chapter 1 list of US Standards and codes: "ANSI/TIA/EIA-568-B.1-4, Commercial Building Telecommunications Cabling Standard, Part 1: General Requirements, Addendum 4—Additional Media—Recognition of Category 6 and 850 nm Laser-Optimized 50/125 ?m...

It should be noted that what Cat5 cable and parts are available, Cat5 is no longer a recognized standard for newly install components. Cat5e is the minimum to be standards compliant. So it wouldn't be a good idea from any stand point to be replacing Cat5 with new Cat5. I like the first...

Thanks for the info! With my limited T1 experience, this has been helpful. But I want to through in another wrinkle, just to make sure I"m on the right page. From my past dealings, I'm familiar with what's referred here to as the CSU. But, what if the dmarc comes right out of a fiber driven...

Adding an additional question to some one else's.... When extending T1's is this manor, what is the max. distance? I've found 650' on 22AWG Cat3. Any other guidelines? We're having our PBX relocated to the new data center/telco facility, and it just dawned on us that the connection to the...

Couple different quick ideas.... 1. for extending the cable...I'd consider using a 110 block to do the "splicing". Cost effective, and really not a lot different than a 710 splice, and probably more reliable than any type of "bean" splice. 2. If ethernet doesn't work, try point-to-point VDSL...

Interesting post. This is my first time reading this forum in probably close to a year and a half. Mostly because of time constraints and forgetfulness. But I'll have to say that the general purpose of this post also came into play. I've imparted some wisdom here, and gained more. I'm...