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-2
votes
1answer
38 views

HP ProLiant DL180 Gen9 modding/cabling [on hold]

I bought a HP ProLiant DL180 Gen9 server in 12LFF drives configuration. Now I'd like to put two additional 2.5" SATA drives inside the case. As I don't have enough reputation to post more than 2 ...
0
votes
0answers
20 views

Can Cat6A connector fit to normal gigabit network switch?

Cat 6A cable is thicker than Cat6 cable. For a Cat6 cable and connector, we can plug into any network switch that has RJ45 connector even a 100Mbps network switch. Just wonder if I use Cat6A cable ...
0
votes
1answer
30 views

What kind of breakout cables do I need for this rackmount setup? [closed]

I am going to be building out a rack and I would like to re-use all the existing hardware for my NAS device and just put it in a rackmount case. I currently am running FreeNAS inside a Silverstone ...
0
votes
0answers
71 views

Ethernet cable only works in laptop, not switch

I have installed a new ethernet cable and for some reason it works just fine when connecting a laptop to it, but when plugging it into the switch at that end, no connection is established. Tried with ...
0
votes
0answers
20 views

Structured cabling, MDF to clients

Hi i am having trouble finding a standard on structured cabling I'm currently managing a school with two building having 3 floors each, the thing is currently there are switches scattered around the ...
0
votes
0answers
37 views

Is SAS 2.1 compliance really required to use an active SFF8088-SFF8088 cable?

RAID card: LSI MegaRAID 9286CV-8e RAID chasis: Norco DS-12E using an LSISAS2x36/28 expander. Currently the chasis and card are very close together but I need to move them pretty far apart. I have ...
12
votes
4answers
1k views

Why is CAT rating not applied to switches?

I see patch panels all come rated as CAT5e, or CAT6 (and so on). I understand the difference between CAT5e and CAT6 cables, more stringent interference shielding, etc. What I don't understand is why ...
-4
votes
1answer
23 views

Connecting two Domain controller [closed]

SIr/madam, I am with learner license in networking 2008 window server,.what type of cable should i use to connect two domain controllers through a hub or a switch. Thank you.
-1
votes
2answers
262 views

Lightning/surge risk of Ethernet cable run inside an exterior wall [closed]

In a previous question, I had planned a Cat6 (Ethernet) cable run outside a home, adjacent to a coax run. I was advised against it, and I'm interested in taking that advice. Now I'm considering ...
0
votes
0answers
56 views

Physical stats of cable modems

I am interested in what physical stats are available for cable modems and what they say about that modem. I can think of the that sound important to me: The ability to cope with strong or weak ...
2
votes
3answers
142 views

Long cat5e cable

Cabling contractors put wires according to plan however I think the distance is longer than 100 meters as I cannot see devices connected on another end. When the cat5e cable is longer than 100 meters, ...
0
votes
2answers
173 views

Odd Network Cable Color Coding Sequence

I just got hired into a new company where no IT has been before. My first task was to identify the possible problems. This is what I first saw, when checking on the cables connected to the switch, I ...
1
vote
1answer
86 views

Infiniband cable

What is the difference between an active and a passive cable? What is the difference between QSFP and QSFP+? Given the choice between copper and fiber, for a very short distance like 3 feet max, is ...
3
votes
1answer
284 views

Send network signal over a very long distance of copper

I have an issue were I need to interconnect 2 switches together. We've estimated that they are 1400 meters away (cabling distance). I wanted to use a media converter to extend the signal on OS1 ...
2
votes
1answer
587 views

Cabling for SAS drives in a Dell T420 with Perc H710

After having purchased a Dell T420 with SATA drives and without RAID, and discovering this was a mistake for performance reasons, I'm obtaining a Perc H710 PCI card and SAS drives. Now I'm stuck with ...
14
votes
2answers
5k views

Tracing a network cable that is already connected to the network

Some remodeling was done while I was away from work, and I'm left with several unlabeled cat5 cables that are terminated with RJ45 keystone modules. On the other end, all of the cables are terminated ...
4
votes
2answers
196 views

Find a UTP cable in a live network

Is there a way to find a UTP cable in a live network, without damaging the network? The problem is we have some cables laying in the server-room from god knows where. I want to find the other end of ...
1
vote
0answers
61 views

USB having periodic connection issues over <15 foot cable run - EMI or?

I hope this is an appropriate topic for this stack exchange. I have a cable run just shy of 15 feet that connects a few monitors (3) and usb 3.0 devices (a USB 3.0 hub) to one of the servers on the ...
3
votes
1answer
133 views

SFF-8087 cable and connector variations causing fault?

I recently bought a set of 6 cables to connect my LSI MegaRAID card to my Norco-4224 backplane. The connector on both ends is SFF-8087. However, when they arrived, the disks would not be detected. ...
-6
votes
1answer
395 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
305 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 ...
-1
votes
1answer
186 views

What is the most proper way of wiring RJ45 for Cat6/LAN?

I currently know of three different wiring patterns for RJ45: T568A, T568B, and USOC. Simply put: Which is the best method for creating a Cat6 cable? From my research, it seems like I should use ...
-3
votes
1answer
85 views

Splitting Ethernet cable [closed]

I am looking for the best way to network my small business. I have an office where my router/modem are located, and then 2 more computers in another room. I can route Ethernet to this room with about ...
6
votes
1answer
877 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 ...
3
votes
1answer
741 views

Do Netgear switches accept other brands of SFP+ modules and cables (e. g. Cisco)?

Specifically, I'm looking to connect servers with Intel X520-DA1 10 Gigabit Ethernet cards to the 10Gbe ports of a Netgear ProSafe GS752TXS. Can I use Cisco SFP+ cables (SFP-H10GB-CU5M) and optical ...
3
votes
1answer
432 views

Using Stranded vs. Solid CAT5 in a cable tray

I'm going to be installing a switch and 40 workstations/printers in a building. All the rooms have raised floors with cable trays running in various grids and there are cable trays going between the ...
0
votes
1answer
604 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
104 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 ...
2
votes
1answer
3k views

Is crossover cable still needed? [closed]

Do I still need a crossover cable to connect two PC's directly? (NIC <-> NIC)? If not, then why was this needed in the past, and when was it used for this? Specifically, when did crossover cables ...
0
votes
2answers
211 views

Can I use a 10G optical cable for 1G communications?

On Amazon, I see MMF optical cables advertised for 10Gbe. (See example here.) I'm looking for a 50u MMF optical cable for 1Gbe. Will the 10Gbe cables also work for 1Gbe? (The cable would be used ...
2
votes
1answer
13k views

Chosing the right CAT6 cable type (STP FTP UTP)

I'm doing a network rewiring project, and I'm planning on using CAT6 cable for the wiring, but I have the choice between STP, FTP or UTP cable. Some of those cables, if not most, will run close to ...
9
votes
1answer
1k views

Proper method for connecting multiple non-stackable network switches?

I deal with many clients in warehousing and industrial applications who have IT staff or local consultants. Many of these sites are still using a 10/100 Megabit switching backbone... I've managed to ...
3
votes
1answer
5k views

What will happen if a PoE powered patch cable is plugged into a normal RJ-45 plug?

I have a couple PoE powered keystone jacks sticking out of a wall in a computer lab. We're going to remove /block the excess ones eventually, but for now I'm worried about somebody plugging a laptop ...
1
vote
2answers
123 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 ...
2
votes
2answers
628 views

Identifying a CAT6 cable in a bundle

We had a contractor wire up our office with all the cables leading back to a central location. The only problem is that he didn't label anything, so we have no idea which cables go to which room. One ...
0
votes
2answers
786 views

NVIDIA Tesla K20C in Dell PowerEdge R720xd — power cables

I am trying to put an NVIDIA Tesla K20C into a Dell PowerEdge R720xd. I'm having a bit of trouble understanding the power requirements of the card. First, here is a picture of two pages of the ...
1
vote
2answers
873 views

SAN newbie: What kind of fiber cables do I need to connect to the front end ports on my EMC CX300

I have an old CX300 I'm messing with and I cant determine what kind of HBA\fiber cables I need to connect a server to the front end ports on the DPE2. The hardware reference doesn't give me any ...
4
votes
1answer
81 views

Category 4 Cabling in my Cisco Network

I have discovered slow performance in various portion of my network accessing network drives and server side applications. When I logged into the switch providing access for these users I ran a show ...
2
votes
2answers
644 views

What cable do I require for SFF-8087 to SAS

I have a HP P410 and two 2.5" SAS Drives, i want to connect both those SAS drives to one port. I know the cable for the P410 is a SFF-8087 and ive seen plenty of adapters searching, but alot of them ...
6
votes
3answers
7k 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. ...
1
vote
3answers
181 views

Robust RJ45 for frequent connections/disconnections [closed]

I am looking for robust RJ45 cables/connectors in an environment where people come and go and plug in and out. After a month of usage, the connectors are worn out and fall out and you need to replace ...
1
vote
1answer
100 views

BT socket Device over Structured Cabling

Essentially I have a Credit Card machine which is connected to a phone line via standard BT Socket. So basically, the port of the wall has a balun plugged in which takes the RJ45 outlet on the wall ...
9
votes
2answers
1k 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?
17
votes
3answers
5k views

Connecting two desktop switches with more than one cable?

I was hoping to find a way to increase bandwidth between two desktop switches I have, and I wondered if connecting them with two cables (or perhaps three) instead of just one might increase ...
4
votes
3answers
2k views

Effect of reversing a pair, in cat5 cabling (e.g. swapping stripe and solid)

Is there any practical effect of reversing solid and stripe, when wiring cat5 cables? But if I've got a cable where each pair is a pair but one end is flipped, will this make any practical difference ...
3
votes
5answers
14k views

New office cabling: should we use CAT7 or CAT6a? [closed]

We are going to do the cabling in our new office building and we are thinking to lay down 10Gbit cables since we use HP switches that come with 10Gbit ethernet ports. We will also lay down few fiber ...
2
votes
0answers
112 views

Any tricks for checking if a ethernet cable is in use? [closed]

Faced with bundles of white cat5 in the attic, any suggestions for non-intrusive checks to determine which ones are in use? Thanks, Kent
2
votes
3answers
4k 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 ...
6
votes
1answer
638 views

Why do metal fasteners (e.g., staples) around ethernet cables impair network performance? [closed]

At one point I was living in a 6 bedroom home that had cat 6 ethernet wired to each bedroom. The internet connection to the bedrooms furthest from the cable modem had terrible performance, though I ...
10
votes
1answer
4k views

Server room wiring questions

I'm looking at rewiring our server room to be more presentable, organized, and easier to troubleshooting. Right now we currently have 4 HP racks (don't know the model right now). We do not have a ...