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-6
votes
1answer
50 views

Why is RJ45 DB9 console cable still used, when all the latest computer do not have serial port? [closed]

I still see quite often that RJ45 DB9 console cable is attached with some devices, when I do not even have a computer with old serial port. So I need to either get the USB - DB9 adapter or USB - ...
-1
votes
2answers
42 views

Mini-SAS Connector Issue

allow me to apologize in advance, because I am horribly uneducated in this realm, yet I find myself with this problem: My company hired ProMax to setup all of our networking in our office. One of the ...
6
votes
1answer
383 views

Is it possible to detect rx+ rx- tx+ tx- wires with multimeter?

Is it possible to detect rx+ rx- tx+ tx- wires of an ethernet cable having only a part of cable with multimeter or somehow else? I mean the situation when you have just one side of the ethernet ...
0
votes
1answer
281 views

PVC raceway/conduit for CAT5e/CAT6/CAT6A cable

This is probably a bunch of stupid questions . The scenario is of running a few (5-6) CAT cables (version undecided, depending on costs). The scenario would be something like this :- a 3G USB modem ...
0
votes
0answers
75 views

What's a 25 core network cable

While looking for different types of network cable, I came across this term called 25-core cable. You can get numerous examples putting the term '25-core cable' in any search-engine. But till date ...
1
vote
2answers
73 views

UltraSPARC Serial Port and Required Cable

I have two large SPARC machines and no monitor cable that plugs into them. So I'm trying to get a serial connection to them through null modem cables. However, there doesn't appear to be such ports on ...
6
votes
3answers
1k views

Is APC's smart-signaling cable (940-0024) really proprietary?

First, not sure if this question belongs here or SU, so please advice accordingly before wildly down-voting or blasting me. We have a UPS unit for which we recently configured to work on our network. ...
9
votes
2answers
398 views

Are SATA 1, 2 and 3 cables interchangeable?

I've got an older SATA drive (not sure if it's SATA 1 or 2). Same size plug as my new SATA 3 M/B. Are the cables interchangeable? Any decrease in performance from using a "lower" cable?
2
votes
3answers
1k views

What am I doing wrong with this cat 6 patch panel wiring?

top number is transmitter bottom number is remote terminator 12345678 36145278 is this because I could be mixing T568A and T568B wiring? how do I know if my patch cord is A or B? Do I just look at ...
2
votes
1answer
179 views

How do I find out which pairs of a CAT5e cable are actually connected to another machine?

Using Linux (Debian, to be specific) on a laptop, I want to be able to check whether, for example, the TX or RX pairs are both connected to another machine. If, say, I've only connected RX (and am ...
5
votes
7answers
425 views

What is a DB 9 to 3.5mm quad plug cable used for?

While cleaning up the office today we ran across two odd looking cables still in bags. On one end is a female DB 9 connector and the other end is a 3.5mm plug with 4 contact points. The types of ...
1
vote
2answers
159 views

How to introduce and detect errors in Twisted Pair cables [closed]

I am taught that Twisted Pair cables are twisted to cancel interference. Now, I have a CAT-5e crossed over cable of approximately 2 M in length. I removed the cable's cover and untwisted the wires. ...
1
vote
1answer
76 views

shielded cat 6 cable

I am installing shielded cat6 cable for a building and i noticed that the green and blue pairs in the cable are thicker than the orange and brown pairs. I tried to install a cat6 rj45 but the pairs ...
-2
votes
3answers
342 views

Cable Managerment [closed]

I manage a server room with approx 20 rack servers in two racks. I find all kinds of videos and such on how to manage the network cabling. That is fine, but I would like to see how power cables from ...
-2
votes
1answer
82 views

Network Cable and Rainy Weather [closed]

How does rain and water effect on network cable such as cat5?
-1
votes
2answers
102 views

I can't connect to internet via lan cable because 2032 battery died and my bios bios info is now empty [closed]

I have a compaq CQ61-112SL from about 5 years now... the main battery is almost dead, doesn't keep more then 10 minutes. anyway my problem is that my motherboard battery didn't have any more energy ...
3
votes
2answers
351 views

Cable management between multiple racks

I am in the planning phase of re-cabling our 5 racks in one of our offices and I would like to ask for some guidance on how you go, or would go about managing cables that goes between racks. In our ...
9
votes
1answer
291 views

LAN: What are the things to look at when arriving in a new place

My company is moving to a new place, and the only thing I know about the cabling is that there are cables and a patch panel. I have no idea about the cable speed, quality, and I'm a software guy with ...
6
votes
2answers
330 views

Can I use CAT 6a connectors with 7a cable (and get 6a performance)?

I'm re-wiring a building and want to get the best cable possible laid - it required re-plastering to make a change to the cables and the cables will be there for the next 10 - 20 years. Currently ...
0
votes
1answer
314 views

Airport Express as extender, can I use RJ45 to connect device to it? [closed]

So, my situation is as follows. I have a network printer without wi-fi support. I have an Airport Express set up as a wifi extender (i.e. it just hangs in the power socket, repeating my wi-fi network, ...
2
votes
2answers
380 views

Wall jacks to patch panel?

OK, I'm by no means a seasoned networking pro and I had no say so in the design of our current server room which is in dire need of an extreme makeover. Basically, in our server room we have 12 wall ...
3
votes
1answer
407 views

Cat 5/6 Software based cable certification

Is there any software that will certify cable using only two NIC's and software to run the test? Would a NIC be able to test a cable based on the physical internals that it's made of? I'm ...
1
vote
1answer
162 views

Do 10m external SAS cables work?

According to the Wikipedia page external SAS cables are specified for up to 10m length. However, I found it pretty hard to actually find places that sell cables of that length. This made me wonder: ...
6
votes
8answers
698 views

Stripping cat5 cable which doesn't have a ripcord

I need to patch a couple of cables. Normally I'd work with cat5 cable which contains a ripcord. The ripcord is used to pull outer insulation off without accidentally cutting the individual strands of ...
0
votes
1answer
903 views

Many ARP requests in TCP dump?

I have been experiencing very slow upload speeds on my cable network lately. I ran a tcpdump and found many ARP requests. I'm not sure what process they are coming from, but could this be related to ...
-2
votes
1answer
254 views

Is it possible to create a Gbit network with cross-cable?

If I want to connect two NIC, then I ""must"" use cross-cabling. But: Can I create a Gbit network with a cross-cable? p.s.: The question is for cross-cable!!
5
votes
5answers
636 views

Looking for a software alternatives to a Fluke Meter

I have cat5 ports through out the office that seem to not work 100%. I wanted to know if there is a software alternative to the $1000 Fluke Meters, that I can do the same thing with. Maybe something I ...
5
votes
3answers
412 views

Looking for this special RJ45 modular connector so I can terminate my own cables

We're doing a rewiring project at my work (server room is a mess of cables) and we've decided to go the route of cutting each cable to length and terminating them ourselves. In the past, I've used ...
0
votes
1answer
230 views

Managed Switch console cable?

As per a few other SF questions; I have recently purchased a D-link managed switch. It's a DES-3550. It has a serial port on the front for console access and according to the manual this uses a ...
4
votes
1answer
268 views

Receiving Cable/Satellite Television in Colo?

I am running analysis over many live TV channels (both broadcast and cable networks). Currently I have an office setup with couple of DISH receivers hooked up to HDMI capture cards in a machine ...
0
votes
2answers
840 views

difference between noise and interference? [closed]

does anyone know the diffrece between noise and interference ?
2
votes
2answers
151 views

stp vs utp whats the exact reason for using stp

the wiki article says that twisting the wires protects them from external electromagnetic interference. But then why would you need to go for shielded twisted pair wiring ? Anyway the twist in the ...
3
votes
3answers
381 views

T1 versus Cable Modem

We've been using T1's for years and never changed the connection to a faster Cable Modem. I am concerned about support, return to service. I cannot find in legalese Cable vs T1's FCC Regulations ...
2
votes
3answers
179 views

Dedicated Pipe or Cable Provider

Right now I'm in a position to go with a dedicated 5up/5down pipe from our ISP or go with Time Warner Cable for a 50up/5down connection. Can somebody shine some light into what other things I should ...
2
votes
3answers
269 views

The best cable organizing solution for the servers on the rails?

I'm looking for the best cable organizing solution for the servers installed on the rails inside a rack as well as for the equipment on the rollout carts. I believe there should be some foldable ...