Cat6 Calculation Based On Length And Number Of Bends?
Feb 24, 2012
I`m trying to come up with a couple of equations to determine the characteristics of residential networks.Basically, what I`ve got so far is that the bandwidth is determined by the interval in which PSACR (power sum attenuation to cross talk ratio) has a positive value.I do realize that bends in the cable will modify the impedance and thus modify the twisted pair characteristics.So, what I am looking for are the equations that would give me length and bend (corner) dependencies (for example, if I have a 130m link that has 4 corners, my link will have a bandwidth of X,attenuation of Y and max data rate of Z).
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Feb 23, 2011
what length does cat6 cable support for networking
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Dec 10, 2011
I have a Dlink DIR-655 router for my wired and wireless router for my home network. I have a 100ft cat6 ethernet cable. I pulled it from the router to my home server in my basement.
Does the 100ft cable make a difference or does the fact that it's a cat6 cable make a difference?
When moving similar files at work, it's faster. So I'm trying to find out what's the bottleneck at home. What speeds should I expect for a home network?
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Mar 26, 2011
I have some tunnels which terminate to my home router. I'm allowing the other ends of the tunnels to use my voice setup. I need to prepend *67 to all called numbers which don't originate from my house. I don't want people calling my home number based on the caller-id number they see when someone across one of the tunnels calls.
So if 5008 calls 212-333-4444 I want it sent to my provider as *672123334444. If 5001 calls a number, I don't want it touched. Can I do this? I can use IOS or CUCM here.
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May 11, 2012
I'm reading this definition in the cisco T-shoot student guide:
"Align-Err: this is the number of frames with alignment errors, which are frames that do not end with an even number of octets and have a bad cyclic redundancy check"
I don't understand what "frames that do not end with an even number of octets" actually means. Did they mean even number of bits? or does a frame's lenght need to be an even number for it to be considered valid?
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Apr 26, 2012
I want to be able to gather some time metrics based on source IP, and destination port. Is it possiable to track how much time a user spends using a service based on it's port number. I have figured out how to capture all the data, and I can then look at timestamps, but I would like a better way if possible. Can this be done at the firewall, or do I need a different appliance?
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Nov 10, 2012
i don't fully understand about Matric, LocPrf, Weight. and how to calculate it in BGP.
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Nov 3, 2012
We have a Cisco 4506 with Supervisor 6-E. We plan on replacing the existing 4 line cards with
WS-X4548-GB-RJ45V
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Jan 30, 2012
I'm doing some throughput calculation test between a wireless client and a wired desktop computer, and I'm a bit confused about the result i've got. According to the client's card and the WLC, the client is connected to 802.11g, at a speed of 54Mbps. To perform my test, i'm using IPERF (available here [URL) The result is as follow:
C:iperf>iperf -c ....... -i 1 -t 120
------------------------------------------------------------
Client connecting to ........, TCP port 5001
TCP window size: 64.0 KByte (default)
------------------------------------------------------------
[ 3] local.......port 1266 connected with .......port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 1.0 sec 640 KBytes 5.24 Mbits/sec
[ 3] 1.0- 2.0 sec 256 KBytes 2.10 Mbits/sec(code)
As you can see, i'm far away the maximum theorical speed of 802.11g. Any software wich is able to test the throughput of a connection? The client wireless card is a Dlink DWA-652 and the wlc is running code 7.0.116, the AP is a cisco LAP1042N.
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Jan 3, 2013
I've been playing around with the Cisco RV180s for a while now and have come across a problem with the subnet calculation in the static routes and routing table. Essentially, if I configure up a static route for a /16 it's entered in the routing table as a /13. If I add a /24 it's entered in the routing table as a /16. I haven't tested every subnet size and combinations but this looks like a fairly fundamental maths bug.
As a side note, I notice that the 1.0.1.9 release notes state the removal of SSH Server, however, I can not find any reference to it's existance prior to 1.0.1.9, did/does it exist in 1.0.0.30 and if so where? .
Screenshots are below and an extract from the configuration file for reference.
From the config file:
route = {}
route[1] = {}
route[1]["active"] = "1"
route[1]["dstIpAddr"] = "8.8.0.0"
route[1]["gwIpAddr"] = "192.168.1.250(code)
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Mar 7, 2012
On a pair of my CISCO7609-s (engine:sup720-3B IOS Version:12.2(33)SRD4),some interfaces is configured as routing interface but also them are attend MSTP caculation and i really caught BPDU packet go out from these ports. [code]
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Jan 18, 2012
How do I...add a dos based computer to a network running windows 2003
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Nov 13, 2012
I'm thinking of making a security system for my house (and possibly selling and setting up for others) based off usb 1080p webcams. I read online the max length of a usb cable is 5m before you need a hub to act like a repeater. Could I simply buy a cat6 (or 7) cable, splice the usb into it, and then unsplice at the computer as a workaround?
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Apr 5, 2013
In my coy two desktop are connected to home network and one network printer is installed in our complax so my problem is in one desktop two NIC card are installed in other desktop one NIC Card are installed and no any connectivity through Switch.
so my problem is i connected to a desktop by two NIC card desktop via cat6 cable to other words connected to lan by two NIC card but my desktop can not connect to the Network printer.
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May 10, 2011
i want to know what is exactly the difference between cat6a and cat6+??
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Sep 5, 2012
Our house has a cat5 line that runs from downstairs, around the outside of the house to an upstairs office. We are consolidating all the outlets that are randomly spread around the walls. The cat5 cable is about 6 inches too short to reach the new box so we figured we might as well run a new cat6 line. (I think we can make the run 20 feet shorter so that's a bonus.)The cat5 line has 2 jacks wired in series at either end. Everything I've read says cat6 is much more touchy and you should only expose the minimal amount of wire from the sheathing and don't untwist the pairs more than necessary. Can I put two jacks on each end of the cat6?
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Nov 21, 2012
Whenever it comes time to terminate Cat6 lines into an RJ-45 connector, there is an expected way of lining up the colors in each end. This differs somewhat between Cat5 and Cat6 but the principle remains the same: there is a standard order in which to feed the wires into the connector.
My question is, why is this order used? Is there a specific reason why it is done this way? The way I see it, since all 8 wires inside the cable are the same, it shouldn't matter which order you use, as long as it is the same on both ends...
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Mar 8, 2013
I have done similar with cat5e in the past, but only operating at 100mb/s. The gigabit stuff I have done so far has had the power in a separate stud cavity.My structured wiring project will be installed in one stud cavity in the soon to be new home office. Not exactly using a structured wiring cabinet, but rather using a 7u wall mount relay rack bracket. The cabling will be entering using 2 separate header penetrations. One existing just inside on the right side of the stud cavity carries 110V 12/2 romex to a stud attached box / recepticle. The other side gets the new penetration, a minimum of 12" away. That's the one that the ethernet cable will pass through. The cable runs will run through the wall and through a brush plate, and then to the patch panel.
The Cat6 cable is UTP, and is marked for in wall use. This is the stuff with the spline if that matters.The romex, by code MUST be attached to the stud, and it is, the cat6 on the other hand is allowed to be loose in the wall. I do not plan on having enough slack in the wall for the cat6 to ever get closer than 8" from the romex, and no closer than 10" from the electrical box.Is that separation sufficient to avoid inductive noise on the ethernet cables? Like I said, I have done similar with Cat5e and no problems ever, but only attached to 10/100 networks. I can change stud cavities, but would rather stick with the one so that my ethernet, and power both can enter the rack cleanly.
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Jul 1, 2011
Wiring my house for Cat6 very soon. I already have most of the architecture decided on (except the decision of whether or not to use a patch panel, but that's another story). However, the office layout is giving me problems.
See, I plan to rent out my house some years down the road, as work will inevitably force me to relocate sooner or later. I know that *I* would want the ethernet ports on the North side of the office, but I can conceivably see somebody else needing them on the South side of the office. Cords running across the room are a pet peeve of mine, so that's out.
Instead of placing the jacks on just one side of the room, I'd prefer to put a jack on BOTH sides of the room, for each line. Like how you used to find two RJ11 phone jacks on the same landline. (note: only one pair of jacks would be used at a time). Is this easily possible with Cat6?
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Sep 17, 2012
Am running Cat6 cable to my cellar. I plan to run a face plate in the walls of all rooms where there will be an ethernet connection. Originally when I did this in a previous house I wired two rooms together i.e. a face plate in one room and the other end a face plate. I did a cross over cable for this so when connecting anything at the other end it would talk to the device in the other room i.e. room A NAS straight through to face plate, room B PS3 straight through to face plate for example.However as I will be connecting multiple rooms together in to a patch panel then switch / router how will this then work? For all rooms where there is face plate do I crossover all cable to the patch panel or straight through? If straight through to the patch are my patch leads then cross overs to the switch?
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Aug 19, 2012
There are 2 locations to choose from. One location requires me to run longer CAT6 cables. 7 of them. The other location requires me to run a longer RG6 cable. (the CAT6 runs would then be about the shortest they could get)So, I guess I need to know which can handle running parallel with power cables better, 25feet of RG6 or CAT6?The parallel with power cable is only for about 6-8 feet, but that's already more than it should be for CAT6.
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Sep 11, 2012
I decided to see how my WiFi would stack up against my Cat6 ethernet cable. I subscribe to Comcast's 20 mb/s connection.
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Mar 6, 2012
I need to run a cat 6 about 350 feet. will that be alright
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Dec 30, 2012
Installed brand new CAT6 cable from my office PC (W7) to my HTPC (W7) to stream movies (150 feet) and I cannot get file transfer speeds higher than 1MBps. I get the sames slow speeds whether I use the router or plug the two PCs together.
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Jun 30, 2012
Just about to run about 30 metres of Ethernet cable underground from one building to another. I know there's quite a few forums like this which suggest to go for cat5 mostly for the price, not sure when these were advised but cat6 doesn't seem to be too much more now...
So just wondering if it will be worth going for cat6 for a future reference if you will, ideally if products ever advance to support it. Just that I don't fancy digging up the cable in a year or so.
Of course I'd rather go for cat5e but wouldn't mind adding a bit to the budget if it's worth it?
Also does anyone know if it's any more difficult to fit the connecters to cat6e? Are they just the same as rj45?
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Aug 1, 2012
We install cat6 at university. some of the length exceed 100m. Fluke test show FAIL result. does it really matter for the usage in learning and researching? or does it affecting the quality of IP phone?
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Dec 14, 2011
I have about 50m between switches. When using Cat6 I could not get a connecting between switches but when I use Cat 5E I get a connection. The switches are D-Link DGS-1210-10P switches. Why do the Cat6 which is suppose to be superior to Cat 5 not getting a connection.
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Mar 19, 2011
I want to wire the house for Cat6, the current home we live in I had ATT Uverse installed (but I hated it and now with the bandwidth caps I would pass regardless) and they installed Cat5e. I love having a hardwired internet connection in each room so the new place needs to have this done.
-Professional Networking Tool Kit (I was going to buy the stripper/crimper/punch tool but I thought the testing tool would be nice to have)
-1000ft Bulk Solid Cat6 cable 24AWG
-Cat6 Punch down Keystone Jack
Then just zip ties for cable management, cat6 solid plugs + inserts, two hole wall plates and black relief boots. I already have a Netgear GS108 that I'll be bringing with me, if that ends up not being big enough I will just buy a bigger one in the future. I'm planning on running two cables to each room of the house for a total of 12 cables (not all of them will be hooked up, I plan to make sure to label each one at the central location where I'll be keeping the cable modem and switch. Each bedroom will only currently use one port with the spare bedroom not using any but when I'm running cables I'm going to run them all for future proofing our new home. I was thinking of putting the wireless router I have in the living room as if any place will need more than two ports it will be the living room (Receivers, TVs, Bluray players, DirecTV boxes will all end up using RJ45 as I upgrade them).
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Jul 13, 2013
Does anyone Know if I can use Siemens cat6 jacks with any other face plate? I can get all Siemens stuff from work, but am not overly fond of how their face plates look to put them all over my house.
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Apr 17, 2012
I was calculating packet amount of MPEG I use byte rate to divide by 188 byte but now i want to calculate H.264 encode video what is the packet length of h.264? is it same 188byte?
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Dec 11, 2012
Recently encountered this problem where one cable suddenly not working properly.We are using 568B as our standard cabling here, lines 1,2,4,and 5 are working as of checking,but lines 3,6,7, and 8 are not. Before it was working flawless. The cable are buried underground inclosed in a pvc hose.
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Nov 15, 2011
I just bought and received a Cat6 200ft Ethernet cable from Amazon, linkIt is going from a router to my PC and is not working. My old Ethernet cable works just fine from said router to PC. I do not know why this one is not working. I tested the cable out on my laptop and it works fine for that. I am not sure what info to post about my PC, but I am using an Asrock z68 Extreme3 Gen3 motherboard as my lan connector.
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Oct 28, 2011
I have seen 5-port network switches (for home network use)for sale that list CAT5 and CAT5e as the cabling. My question is, can CAT6 cable be used with these switches without performance issues?
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