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Questions tagged [cable]

The questions tagged that way are for the physical aspect of the cable, like length limitation, physical properties, tubing, installation, etc..

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replace APC smart signaling cable with RJ-45 to RJ-45

Is it possible to replace the APC Smart Signaling Cable PN: 940-1525A with an RJ-45 to RJ-45 cable? The cable is built as an RJ-50 to DB9, but I need to connect it to a console server that only uses ...
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1 answer
36 views

Server 10Gb connect in Switch 1Gb

I have a server that has 10Gb NIC and a switch with 1Gb SFP ports can I buy a 10Gb DAC cable at the 2 ends that will work? including the switch that is 1Gb? Or can I buy an LC-LC cable and a SFP+ ...
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1 answer
29 views

Is this Cat5 or Cat5e

I bought some Cat5e cable for my house data wire however the coil that is delivered clearly says Cat5. The shop say it is 5e as they don't stock 5. Can anyone tell for sure?
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1 answer
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Trying to convert a Dell T420 Single Drive to Redundant. Looking for validating my steps

I have a Dell T420 and read different ways to upgrade it to redundant PSU's. Details I saw on Dell's website a thread where a user asked how to upgrade to a redundant PSU versus the single 550psu. ...
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2 votes
2 answers
54 views

Correct F/UTP cable installation

I've read a lot of things about shielding in twisted pairs cables and I feel like it's a controversial topic. I want to know the correct method to connect two devices using a F/UTP cable. Assume a PC ...
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9 votes
6 answers
2k views

What Ethernet twisted pair cable is best with a particular Ethernet switch

tl;dr I want the best supported Ethernet cable for my Ethernet switch. How do I correlate Ethernet cabling speeds measured in hertz with an Ethernet switch "speed" measured in bits-per-...
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0 votes
1 answer
73 views

Cabling for SAS controller and SuperMicro BPN-SAS-825TQ

I´ve managed to get one of the SuperMicro low-end server to my lab. It is chassis 825TQ-R740LPB with a BPN-SAS-825TQ backplane. The specification document is saying, that this backplane is SAS ...
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1 vote
1 answer
87 views

Is there a difference in performance or capability in these sas cables?

I'm looking at sas sff-8644 to sff-8088 cables and noticed that some are single cable where as others are dual cable. What's the difference between these, and is one better when connecting an hba to ...
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5 votes
2 answers
1k views

Can tone ethernet cable into patch panel but it's not working

So we recently had to two major issues happen at a location. We had a lightning strike hit the building We updated switches after this lightning strike Now one thing that was 'hit' was a SOHO router....
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28 views

Port negotiation issues, IP Radio tower

Got a ubiquity IP radio on a tower. One side of the link negotiates 1G but the other side has issues. It will negotiate 100Mb after a reboot every now and again (very random) but mainly sits at 10Mb....
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  • 101
2 votes
1 answer
393 views

Can I connect HP Ultrium 1760 drive to LSI Logic SAS 3041E controller using the cable on the picture

I want to connect HP StorageWorks LTO-4 Ultrium 1760 tape drive to LSI SAS 3041E controller using the cable on the photo. The cable is advertised as 0.7M Mini SFF-8482 to SAS 29P SATA . Or an adapter ...
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26 votes
2 answers
5k views

How does the RJ45 crimping tool work?

There are plenty of videos and descriptions about how to use an RJ45 crimping tool. I've seen a few, and I have even tested a crimping tool, but I still don't understand how it does what it does. What ...
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0 votes
0 answers
36 views

Analyzing an ethernet cable for low negotiating speed

I'd like to find out why my cat 6a refuses to negotiate 1000 speed. I have a 15 meter long U/FTP CCS cat 6a Ethernet cable installation. I have analysed the cable with a multimeter and each strand (...
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2 votes
0 answers
95 views

Electrical compatibility of SFF-8643 for U.2 SSDs

I notice a lot of U.2 adapters on sale, seem to show what looks like a U.2 to SFF-8643 cable, or SFF-8643 PCIe connector/adapter, instead of the expected U.2 to SFF-8639 cable or SFF-8639 PCIe ...
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-2 votes
2 answers
796 views

Is it possible to connect an Epson Receipt Printer (w/ an RJ-11 jack) to our router?

We have an Epson Receipt Printer (#TM-T88V) at our building. It has USB, serial, and RJ-11 ports (see picture). When we bought it, we wrongly assumed it had the common Ethernet (RJ-45) port on it. ...
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0 answers
217 views

Must a patch panel be initially terminated in the rack?

If Cat6 Ethernet cables were terminated to a wall mounted patch panel, is there a method to move the patch panel to a rack (without having to cut them and reterminate them)? Is a patch panel coupled ...
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0 votes
1 answer
102 views

Ethernet Cable Broken [closed]

Hi I have a 15m ethernet cable going under my floor from the front to back of house. It has developed a fault and pins 1 & 6 are no longer connected (I've tested it). Given getting it back up or ...
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1 vote
0 answers
331 views

IBM 2005-16B switch console cable

I have an IBM 2005-16B switch, and it has a male serial connector on it, and I want to use that to configure the device. I also have a usb to male serial cable, and I have recently created a null-...
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2 answers
1k views

Ethernet cable link negotiation

I just bought a SoC computer with 4 eth ports which I plan to convert into a router with Linux. I connected a CAT5 cable to both one of the eths and to my notebook, but I don't seen link on either ...
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17 votes
1 answer
6k views

What kind of SATA connector is this?

My Supermicro motherboard has a "vertical S-SATA connector". The manual simply says "A vertical S-SATA connector, offers four S-SATA 3.0 connections (S-SATA 0-3)". I took a picture of it and it ...
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0 answers
513 views

What is the precise meaning of an "Ethernet Drop"

Do the words "Ethernet Drop" (without other qualifications) imply that both sides of the connection are terminated in RJ45 sockets? I am trying to interpret a document where I am unsure that work ...
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5 votes
2 answers
1k views

Hardware involved in Direct-connect (switchless) 2-node Storage Spaces Direct Cluster

For my department, I envision a two-node cluster of identical machines, running S2D. I want to use Broadcom 57416 10GBASE-T Adapters (example description), because they support RDMA and run at the ...
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-2 votes
1 answer
254 views

Wiring back-to-back ethernet sockets

I need to wire two cat 6 sockets, each in a different room, so that a switch connected to each, via patch cables, can communicate. What cabling standard should I use: 1) T-568A at both ends? 2) T-...
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-2 votes
1 answer
660 views

Ethernet cable only works A to B, not reversed. Why? [closed]

A custom ethernet cable with both connectors wired as T568B only works when connecting A to B, but not reversed, i.e. when switching ends and connecting B to A. A is a Mac, B is a 1Gb TP-Link ...
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4 votes
4 answers
1k views

Upgrade to gigabit switch made long cable stop working

We have two buildings connected by a 30m network cable with a switch on either end. Last week we upgraded some old equipment to support gigabit speeds. One of the two switches was an old 10/100 ...
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0 votes
0 answers
183 views

DHCP request on ethernet cable reconnect with Ubuntu 16.04 Server

I have Ubuntu 16.04 Server here. My Ethernet interface is configured to use DHCP via /etc/network/interfaces and also I enabled "allow-hotplug" for the interface. It works. I can boot without cable ...
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0 votes
1 answer
119 views

What is a 4x 10gbe QSFP-QSFP cable?

I was looking for QSFP cables on Ebay and came across a Brocade 58-0000033-01 marked as 4x 10GE even though it has one QSFP connector on each end. I don't understand what this cable is for, will it ...
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0 votes
1 answer
8k views

high rx and dropped errors

I connected an IXIA appliance with an ethernet interface with a span port: With ifconfig -a I see this situation: Link encap:Ethernet HWaddr 00:19:99:0b:0b:00 UP BROADCAST RUNNING PROMISC ...
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-2 votes
1 answer
103 views

300' Fiber Optic Cable not passing Data [closed]

Just installed a 350' Fiber Optic cable for a client. Customers IT company came in to install the AT&T router and said the fiber optic cable is not working. IT company installed the router with a ...
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0 votes
1 answer
623 views

What is the type of this SATA port called? (On Dell EMC R440 - 14G Server)

I would love to know what's the name of this connector so that I could stock some cables in aftermarket. The Dell Parts for connecting the MB to the 4x Drives Backplane is called "GPPHP", yet the ...
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2 votes
3 answers
73 views

Networking (complete beginner) from one floor to the next

I'm new to networking. I have designed my network for the ground floor of a building. I have a router with fibre coming in, then an L2 and L3 switch. L2 going to 6 clients while the L3 goes to 2 ...
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0 votes
2 answers
84 views

RS232 to USB extension cable to network configuration

I'm not sure this is the correct place for this question. I have a console cable to configure network devices like switches (https://images-na.ssl-images-amazon.com/images/I/41LDstMTA5L.jpg) So, I ...
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3 votes
2 answers
823 views

Does Cat5e patch cables on a Cat6 network degrade performance?

Let's suppose I have a building run on Cat6 cables. The lines are certified for Gigabit speeds. I have Gigabit switches. I am not going for 10Gbps anywhere. Now, on my patch panels, I would prefer to ...
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  • 337
1 vote
1 answer
2k views

SAS 3.0 cabling without a backplane - SFF-8680 vs SFF-8482

I would like to connect six HGST He10 SAS drives (model 0F27402) to a Lenovo M1215 HBA using direct cabling. I originally bought two SFF-8643 to 4*SATA breakout cables before seeing the drives as I ...
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0 votes
1 answer
130 views

Splitting ethernet to multiple (3+) devices (phones, PCs)

I'm currently troubleshooting an environment where there is a lot of network latency issues, all sporadic and intermittent across workstations. The network uses a mix of calls from on-site dialer and ...
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0 votes
1 answer
950 views

Where to plug in the power switch on a HP proliant ml330 g6 systemboard?

The cable of the Powerswitch in the case needs 2 Pins, but there are 20 Pins at the front panel connector of the Mainbaord. Where I have to plug in this Cable?
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1 vote
1 answer
2k views

Cable management in cabinet and between cabinets

We currently have three cabinets that over time have turned into a spider web. These racks host Servers (power an ethernet connections in the back). Network switches, Firewalls, Routers etc. (all ...
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0 votes
1 answer
148 views

Is there a meaning of why does the wire in a Cat6 or Cat5e cable colored differently?

like for example: does the green wire mean something in a Cat6/Cat5e cable?
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-1 votes
1 answer
51 views

Why do cable propogation delays exist? [closed]

I've got a timing card which emits a pulse per second (PPS). The specs for the card state there is a delay of this PPS of approximately ~7ns for each meter of the cable, or ~200ns per 30 meter ...
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  • 161
0 votes
1 answer
511 views

How to correctly connect SFF8643?

I plan to buy Adaptec RAID controller in my workstation. I have 8i ports with 2xSFF8643. So I need to use 2 cables SFF8643 => 4xSATA (shown on image). But I can see on image 1 additional connector (...
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  • 103
-1 votes
2 answers
1k views

Back panel display ports on Z800, connecting to VGA monitor

I work for a charity, we've received a HP Z800 workstation. Need to connect a 15-pin VGA monitor. However the the back panel has only the following ports (as shown in the two images) connected to ...
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1 vote
0 answers
193 views

Ethernet cables along with power cords in Dell Cable Management Arm

Recently I read that placing together Ethernet cables and power cords is not a good thing (many sites and good-practice articles says that). For example: http://www.techrepublic.com/blog/10-things/10-...
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  • 225
7 votes
1 answer
12k views

Difference between Cat 6a and Cat 6 plug

What's the difference between cat 6a STP and cat 6 STP plug connector? Can I use a cat 6 plug on a cat 6a wire?
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5 votes
1 answer
51k views

Use of unused pairs in cat5 ethernet cables? [duplicate]

Cat5 ethernet cables use only 2 pairs for Ethernet what are the other 2 pairs for ? Pin Color Function 1 White with Green +TD 2 Green -TD 3 White with Orange +...
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1 vote
2 answers
96 views

Tagging post cable installations

So I got a main station and 5 substations in our warehouse. I've got hired after all cable jobs are done. Now, my biggest challenge is to tag all cables, because they ran cables without marking them. ...
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0 votes
1 answer
372 views

Dell T7500 PERC Raid

I am looking to buy a Raid card as I can not use the motherboard Raid to achieve Raid 5 or 10 with my 4 SAS drives. I am a bit confused on how I would connect the drives to card. Do I need to ...
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6 votes
1 answer
17k views

What is th difference between F/UTP , F/FTP and FTP?

I am in the following situation :the IT department asked for a wire of type FTP. The company that is cabling the building is using F/UTP. Is it FTP? Or they need another type of cable kind of F/FTP??
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2 votes
2 answers
2k views

gigabit cat6 cable connecting 100Mbps only (Electrical interference?)

I have a gigabit switch and I am connecting my laptop to it using a cat6 ethernet cable. The problem is it is connecting to 100Mbps only instead of 1Gbps. This is what i found : The is a zone in ...
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  • 121
1 vote
3 answers
211 views

How to connect a Juniper EX4500 to netapp X1107A

What is the best and not expensive way to connect a Juniper EX4500 to a X1107A Chelsio PCI Netapp card? Will these do (10GBASE-SR) for both end? and then connect with fiber cable? How important is it ...
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1 vote
2 answers
681 views

How to Connect a Core Switch with an Edge/Client Switch using SFP+ Ports

I am not sure if this is the correct site to post this question and I am more a software type of guy that needs to get started with Networking, so please bear with me if this sounds stupid... Having ...
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