0
votes
1answer
104 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
68 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
2answers
184 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 ...
-1
votes
2answers
152 views

Why are serial console ports on network switches 8P8C/RJ45 sockets? [closed]

It has always seemed a bit strange to me that the console ports on networking gear are 8P8C (popularly referred to as "RJ45" even though that's not strictly applicable here) connectors and require an ...
33
votes
6answers
14k views

Why do ethernet cables have 8 wires?

This might seem a stupid question but why do Ethernet cables have 8 wires? Cat5 cables were just using 4 of the 8 wires, so only 4 are actualy 'needed'. Why not 12 or 16 wires?
8
votes
5answers
14k views

Cat 6e vs Cat 6a

From what I can understand, Cat 6e does not actually exist but a number of manufacturers are selling some cable labeled as Cat 6e. Some sources say that Cat 6e is just Cat 6a but the manufacturers ...
1
vote
2answers
290 views

Network testing tool cat6 cables [closed]

I have been trying to crimp cat6+ cables at home and been having issues. some would work fine at gig others would only go to 100mb. Is there a reasonable tester out there for verifying a cable run ...
3
votes
4answers
331 views

Cutting patch cables to length

I'm rewiring a rack, and would like to have the cabling cut to length to make things as tidy as possible. The suppliers of Cat5e/Cat6 cable I've found only really supply bulk cable in multiples of ...
0
votes
1answer
313 views

How do you explain ethernet cable problems to non networking people? [closed]

We've recently been doing a large network migration in our datacenter. We've had a few cables in this start to deliver really bad pings (in excess of 500ms on a LAN) before they could be replaced. ...
66
votes
1answer
7k views

What happens when you plug two sides of a cable to a single networking device?

What is likely to happen when you plug two ends of a network cable to a single switch/router? Will this create problems on the network, or just be ignored?
1
vote
5answers
8k views

Why would cat6 connectors not work with cat5e patch cable?

I had a naff batch of cat5 connectors (the latching mechanism didn't work) so decided to order in some cat6 connectors in preparation for the inevitable upgrade. My existing reel of for making patch ...
1
vote
1answer
168 views

Wiring up RJ45 plugs on a basic network extension

I'm trying to wire up a network in an outbuilding. Unfortunately the engineers have left me bar wires so I need to add plugs and sockets. I have a 1gbps socket in the outbuilding that connects to the ...
0
votes
1answer
153 views

Network Cable Testing Diagnostics

I've recently helped a friend wire his new office up with Ethernet cable wall sockets that all connect to a central patch panel. The issue I currently have is with testing the cable.. I receive the ...
1
vote
2answers
1k views

How can I troubleshoot APIPA (169.254.x.x) in physical network cabling?

all: We have just started using an existing Cat5e cable to run 100Base-T to a new office, but unfortunately, machines in the new office see link but receive an APIPA address (169.254.x.x). I brought ...
11
votes
4answers
833 views

Industry Standards for Network Infrastructure Labeling

Are there any current industry standards IEEE, ISO, ANSI.... available that state how a buildings physical infrastructure should be labeled at the rack and jack and how the documentation should be ...
1
vote
2answers
213 views

Using 110 Blocks and Cross Connects for Data connectivity?

I recently started a new position and upon investigation it appears all data drops from the floor first gets punched down on a 110 block, cross connected to another 110 block and then connects to a ...
0
votes
2answers
614 views

is it possible to direct connect a client and server with 10GBASE CX4 copper cables?

Server has two 10GBASE-CX4 ports. client has 10GBASE CX4 HBA. can theybe directly connected with a CX4 cable without the need for a switch? like SAS Infiband connectors?
1
vote
1answer
173 views

hybrid cable for QSFP to CX4 convertion

here is a hybrid cable for QSFP to CX4. Will this fit SFP+ ports? Deeply confused by standards and struck in a situation with wrong hardware selection!Personally have not seen the ports/hardware and ...
4
votes
2answers
2k views

please demystify the 10Gb ethernet interfaces, cables

this really is a Dell question but tempted to ask the experts @ serverfault. choosen a Dell powerconnect 8024 10GbE switch. per the spec sheet this has 10GbaseT ports. "24x 10GBASE-T ...
0
votes
1answer
338 views

How to build a Software-Network-Tester?

The company where I work is building special twisted pair network cables. Those cables need to be tested for function and performance (100/1000 Base-T). Since we only produce small batches of those ...
12
votes
15answers
949 views

Network cables - make them or buy them

First of all, I must say I've never had a problems with making cables by myself, last years stopped using cable testers just because they always say the cable I've made is ok. But I see there's a lot ...
1
vote
3answers
3k views

UTP cable maximum length

When I connect ten computers over a 100 meters (328ft) UTP Cat5, is the signal loss so large that it will affect my network performance? These computers perform simple office tasks, and the 100m utp ...
0
votes
2answers
251 views

What is the crappiest network build you've ever seen? [closed]

This is only about networks you have seen personaly, not heared from others or seen on pictures at the web. Cables hanging from the ceiling lamps? Cables going trough culverts and other tubes? ...
5
votes
1answer
424 views

Planning to buy some cat5e cables. 568A or 568b?

I plan to buy about 20-30 feet of Cat5e (or 6) cables. I have 30 mbits connection. I was looking around and the ones we are considering are 568B. I was looking for quality in my cables. Is this ...
24
votes
10answers
10k views

Network cable color conventions? [closed]

Are there any color conventions for network cable? I'm talking jacket color here, not the color of the individual conductors. I've seen and used mostly grey and blue which is what's usually readily ...
1
vote
3answers
1k views

Multiple VLAN sharing over dummy switches

I already have a network for 4 kind of purpose (Local Network, VoIP, Accounting Depart, Sales Depart). All of them on same network (192.168.2.0/24) I'm planning to separate these networks and i have ...
4
votes
2answers
859 views

Network cabling Tips

I'm looking for some useful information about how to design network cabling for a building. I'm not so much interested in wiring standards such as 568A, but more interested in physically wiring the ...
2
votes
4answers
3k views

Fiber Optic Cable not working

Basically I am having a problem with a fiber optic cable connecting 2 switches not working, hired a professional to help fix it and in the end it is still not working. I need someone to look over ...
27
votes
14answers
54k views

What is a patch panel?

What is a patch panel? How it is different from (layer 2) switch? EDIT: I think my primary question (and confusion) is this: Why don't network connections go straight to the switch? Don't we still ...
7
votes
7answers
19k views

Are a RJ11 jack and a RJ45 socket physically compatible?

Can the smaller RJ11 jack be plugged into an RJ45 (technically a 8P8C) socket? I've seen the plug be plugged into the socket, but have not seen it used to transmit data.
5
votes
5answers
15k views

How to use a Tone Generator to trace a network cable

We have a tone generator kit for tracing network cables, but I am having trouble using it correctly. The tone generator end plugs into the network cable I am trying to trace, and then I assume I ...
2
votes
7answers
454 views

Network equipment console cables

A lot of network devices has a terminal RJ-45 socket, which is usually a simple COM-port. So, to configure such a device, you have to connect RJ-45 socket to PC's (or terminal's) DB-9 COM-port. ...
6
votes
5answers
6k views

Gigabit with cat5 cable

Can a standard cat5 cable transmit at a speed of 1000 Mbit/s ? I've asked several people I know in the networking field and received different answers. I know a cat5 "works" on a Gigabit network but ...
4
votes
5answers
5k views

Effect of heat on CAT5 Ethernet Cabling

I am wondering what the heat rating is on standard CAT5 cabling or where I can check the heat rating of my cabling by using the information inscribed on the cabling? In my specific situation, I am ...
16
votes
3answers
5k views

What is the wiring for a patch cable?

What is the wiring order for an 10/100/n-Base-T patch cable? What about a crossover (x-over) cable?