Cable length?

From all the pictures it looks as though the MB/MBP needs to be fairly close for connection. There is no spec that I saw as far as length of cable (pwr,usb,displayport). Also I know of no mini display port or magsafe extension as of this time.

My local Apple store has one of the new displays on display and I went in to look at it today. I was shocked that the cable is only about 30" long end to end. The MacBook must be sitting right next to the display for the cable to reach.
I was ready to purchase the display (as soon as available) but I want to put the MacBook in the center drawer (pull out keyboard drawer) when using it with the display, keyboard and mouse.
As this is clearly not possible I will look for a different display, probably a Dell. The built in camera and mic. seems meaningless as the MacBook already has those devives and must be on the table anyway. There must be another device in the wings, line an updated mini, that will take advantage of the camera and mic.
I an not sure the cable is long enough to reach a Mac Pro sitting on the floor even if the Mac Pro had a mini DisplayPort connector.
- Mike

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Maximum Cable Length

This might be a stupid question, but... Is there a limit in cable length, beyond which Airport Express is unable to deliver a strong enough signal. My cable is not that long, maybe only 15 meters or something like that.
I have Airport Express (Gigabit Ethernet) and since I'm renovating my house, I had to move AEP and computers from one room to another (with one room in between). ADSL modem stayed in the room, only AEP and computers were moved.
As I did so, my internet connection (cabled trough AEP and/or wireless) became extremly slow and unstable, uploading only few bytes per second (it took half an hour to upload 300kb file).
Scenario 1 (extremly slow):
ADSL modem --15m--> AEP --> Desktop
Then I moved AEP back, and connected desktop computer in the new room, but desktop computer is unable to connect (limited or no connectivity)
Scenario 2 (no connectivity):
ADSL modem --> AEP --15m--> Desktop
But, if I connect my desktop directly to ADSL modem, everything works just fine (but of course, I don't have wireless).
Scenario 3 (works fine):
ADSL modem --15m--> Desktop
My ADSL modem is able to auto-negotiate cable type (CrossOver or normal), so I don't think wrong cable installations might be a problem....

Hello PetLj. Welcome to the Apple Discussions!
Is there a limit in cable length, beyond which Airport Express is unable to deliver a strong enough signal.
The maximum CAT-5 Ethernet cable length would be 100m. However, cable length and wireless strength are not directly related.
However, it is very possible that you may have some form of Wi-Fi interference in the immediate area that is preventing your AirPort Express from providing a good clean signal to wireless clients.
I suggest you perform a simple site survey, using utilities like the following to determine potential areas of interference, and then, try to either eliminate or significantly reduce them where possible:
For Macs:
o KisMAC
o MacStumbler
o iStumbler, or
o IPNetMonitorX
For PCs:
o NetStumbler
o WiFi Hopper
o WiFi Owl
o WiFi Manager

Maximum cable lengths for USB / FW / DVI & sVGA?

I've hunted around on the net and can't find any kind of definitive answer regarding maximum cable lengths for USB, Firewire 400/800 and DVI / sVGA monitors. Can anyone shed some light?
I'm about to shift my studio into a new room, and have the oppourtunity to stick my G5 and external drives into a corridor cupboard adjacent to where my studio is - in other words, noise free bliss! But....
...if I map out how far my computer monitors, keyboard and audio interface will be from the cupboard, and take into account the twists and turns involved in neat routing, I'm looking at a distance of about 10 meters. I need to know if any of these devices will be OK with such a long run of cable, and if not, if it's possible to achieve a good result using hubs or repeaters?
So, can anyone help me out with info on:
an Apogee Ensemble (Firewire 400)
an Apple keyboard (USB 2.0)
an LCD flatscreen (DVI)
and another LCD flatscreen (sVGA)
Many thanks!

I was just researching the very same thing, though it does not sound like my studio setup will be as sweet as yours. Here are a few things I ran across:
FIREWIRE-
"The maximum cable length specified by the IEEE1394 standard is 4.5 meters. However, more recent tests have shown that certain high quality firewire cables can achieve longer lengths without significantly affecting transmission quality. Several manufacturers sell firewire cables longer than 5 meters (some up to 50 meters)."
~http://www.focusrite.com/answerbase/article.php?id=206
I found an example of a company who claims to sell a firewire cable of that length:
http://www.expansys.com/pf.aspx?i=102956
USB-
There is forum discussion on the topic I was reading yesterday:
http://www.everythingusb.com/forums/showthread.php?threadid=804
But don't go past the 11th post or so, they go off on another subject... the use of hubs & the words "active extension" in that post caught my eye. A quick google search came up with this site:
http://www.everythingusb.com/forums/showthread.php?threadid=804
There were a bunch sites with devices claiming to do this.
Finally I have this chart, which seems to support what what the articles say, without of course any other extension technology/solutions:
http://www.extron.com/company/article.aspx?id=dedigform10
I'm not making any claims at all about how true these sources are, I just have the same questions and decided to toss what I've been looking at into the discussion. Feel free anyone to jump in and tell me its all wrong - I'd love to hear whats right.
~sam

Zen Xtra: USB Cable length

Does anyone know what the cable length is? Because just recently, a friend of mine bought me one, and I needed to get a PCI to USB card because my PC only supported USB .. But, I want the cable to reach up to the top of my tower at least.
Thanks.

I would measure mine, but since it's all tangled into the spaghetti of wires by my computer, i'll take a guess and say it's about 6 feet. Length enough to go from my computer up to my desk with cord to spare.

What can be the max difference in cable lengths that we can have between the ISLs in a port-channel between MDS switches?

Hello All
What can be the max difference in cable lengths that we can have between the ISLs in a port-channel between MDS switches? Do we have any documentation?
Thanks
Chetan

competitive solution instead recommends a distance variance of 30 meters or less among ISLs within a trunk. If the distance variance is greater than 30 meters, undesired and degraded performance will occur. For example, if a trunk has a distance of 100 kilometers, the competitive trunking solution allows a cable length variance of only 0.03 percent!
ref;
http://www.cisco.com/c/en/us/products/collateral/storage-networking/mds-9500-series-multilayer-directors/white_paper_c11-534878.html
hth
regards
inayath
**********PLZ dont forget to rate if this info is helpfull.

What is the max. cable length that the Differential TTL signals can run in both at high and low frequencies?

Hello,
I want to now the max. cable length that the Differential TTL signals can run in both at high and low frequencies.

That is very dependant on the type of cable, its construction, and inherent impedance and capacitance. This may be of use:
http://beiied.com/PDFs2/SSI_14-15-bit-encoder_addendum.pdf
-AK2DM
~~~~~~~~~~~~~~~~~~~~~~~~~~
"It’s the questions that drive us.”
~~~~~~~~~~~~~~~~~~~~~~~~~~

NI PXI 2576 Mux and LFH 160 Cable length.

Hi,
This is SIVA from India. We have plan to buy NI PXI 2576 - 64 channel Multiplexer and Interface cable LFH 160. The project is in design stage. We couldn't able to find out the LFH 160 Interface cable length in NI website. If any one come across this cable. please let me know the same.
Thanks
SIVA

Hi Siva,
I believe that the mating cycles on the LFH side is up to 5000, D-Sub side is at least 500. Let me know if you need anything else.
Thank you,
Chad Erickson
Switches Product Support Engineer
NI - USA

Ethernet cable length from route

Love this forum: After a few years of use this is the first time I haven't found an answer by searching!
Everyone seems to say that the limit of ethernet cable is 100 meters but in two apartments with different routers I have not been able to get a connection between (two different) the router and my computer over about 25 feet. I'm using a (seemingly) top of the line d-link wireless router but maybe its too weak. Can anyone suggest a router or switch that will reach 50 feet or more?
Thanks!
(P.S.) wireless is too slow to back up my iPhoto library, which I want to back up to a Linux Ubuntu PC home server.

Thanks for responding!
The iPhoto library is about 25 gigs at the moment (iTunes is another 15gigs), and can grow pretty quickly. I do have 250gig firewire drive for back up next to the computer but I feel my life of photos in that library and want a second backup in another room of the apartment. I installed Ubuntu on a Windows PC so I could use NFS sharing with the Mac (works great except for speed).
The specifications all talk about maximum theoretical lengths and none of the manufacturers discuss actual cable lengths. Everyone seems to assume that any router will do the job.
I did find an interesting post at the bottom of this:
http://discussions.hardwarecentral.com/showthread.php?t=172404
so I've order a couple of 50ft cat5e cables with factory attached jacks to see if it was my crimping color order that was at fault (which doesn't really make sense but it's the only thing I've found)
Should get them in a few days...
iMac 20" 1.8 PPC Mac OS X (10.4.8)

Cable length limit on the so-called "Internet" port?

Is there a limit on the cable-length when connecting an Ethernet cable to the so-called "Internet" port on a WRT54G router?
I assume this is a standard 10/100 Ethernet port, since I am connecting this to the Ethernet port of my DSL modem. Since the Ethernet standard defines a maximum cable-length of 100 meters when connecting any 2 Ethernet devices, I should be able to use a cable up to this length when connecting 2 Linksys routers together.
Here is what I want to do:
DSL Modem-->Linksys Router-->Linksys Router
My first Linksys WRT54G router is connected to a DSL modem. I want to put a second WRT54G Linksys router in a different building, and connect them with a 100 meter Ethernet cable, connecting the remote end to the second router´s "Internet" port, and the other end into one of the first router´s available 10/100 ports. This will allow me to create 2 wireless signals, with 2 different DHCP scopes and 2 different SSID´s, basically allowing me to extend the range, with the 2 routers connected with a physical wire.
This works when connecting them with a short, 2 meter cable. Using a short cable I am able to associate with the second router´s SSID, get a DHCP address from that router, and then turn on RIP on both routers and have traffic route from the second router to the first one and out to the Internet successfully.
However, when I replace the short cable with a longer one, either 80 meters or 100 meters, I don´t get a link light between the routers. I do get a link light if I connect to a 10/100 port on both routers, but RIP doesn´t seem to want to exchange routes on the second router out anything other than the "Internet" port. Moving the cable back to the "Internet" port fails to produce a link light (unless I use a really short cable, which does produce a link light).
So my question is this: from a Layer-1 perspective, is the "Internet" port an Ethernet port that enforces a cable-length limit that doesn`t follow the standard 100 meter rule?
--- Christer

well..the internet port is definitely an ethernet port...however, it is not supposed to limit the cable length .. try a 50 m cable and check whether it works...because my friend had a similar kind of an issue and it worked fine with a 50 m ethernet cable ..

Max cable lengths for voice links

Hello everybody,
I would like to get an info on max. cable lenghts for FXS, ISDN BRI (only p-t-p config) and ISDN PRI connections between PABX and Cisco VoIP gateway, especially that regardig ISDN. I have info from some standard. spec, but want to know the Cisco environment. I didn't find anything useful on CCO..
Thank you very much for your valuable and prompt help.
Peter

Hi,
thanks for that. I've seen a document on the VWIC-MFT-E1 that states the max cable length is approx 600m.
http://www.cisco.com/en/US/products/hw/routers/ps274/products_tech_note09186a00800b6e0f.shtml
Where did you get the 200m from? do you have a reference doc you could point me at?
Stuart

E1 Cable Length Limitation

I need to know the E1 cable length limitations,in meters? Actually i've a customer who needs to extend their E1's from the basement to DataCenter Room and you people know the UTP Cable limitation. So which type of device should i refer to them for this purpose.

UTP gauge 22, typical attenuation, should cover 1000 feet ( > 300 m) without problem.
Make sure you use proper cable and respect the pair twisting, that is NOT like ethernet.

Max USB cable length for LT1421

Does anyone know how long the USB cable can be for connecting the LT1421 flat panel to the computer?
The screen is delivered with 1,8m but I must place the panel in a least 6 meter distance from the computer, is that possible?
I know that the max length for USB 2 is about 5 meters, but it varies between products how sensitive they are to cable length.

3 meters for USB1 and 5 meters for USB 2. You can find lots of information on the subject with a quick search. Try http://www.usb.org/about/faq/ans5 for starters. It explains how to get up to 25 meters of USB cable when you use several USB hubs.

AP Cable length issues - Will PoE injectors act as a repeater?

Hello,
We have a site utilizing the Catalyst 3650 switches with integrated controllers for WiFi. Unfortunately due to a union/political situation we're not able to work closely with cable designers and installers to ensure cable length restrictions aren't exceeded and often have to get creative with remediation for such problems.
I have 5x3700 APs that are hung in an extremely high ceiling with directional antennas that just can't boot up and connect to the integrated controller from the nearest closet. The cable length is likely close to 200m. Unfortunately, installing a 3650 closer to the APs is not an option due to architectural and environmental factors.
I'm wondering if a power injector(AIR-PWRINJ5=) will act as a simple repeater bump in the wire and effectively extend the possible cable length if inserted half way between the AP and the Switch?
We've tried using the 3560C compact switches for this problem which works great for WLC based installations but breaks the integrated controller scenario as all APs must be connected directly to the switch for the integrated controllers to work.
Thanks,
Greg

You can try to introduce a power injector between the switch and the AP, at less than 100 meters from the A . You´ll guarantee the AP receives PoE correctly. However , the cable distance facing the 802.3 Ethernet protocol remains of 200 meters , and this will , if that works, that there are many collisions in the medium due to the timing of the ethernet protocol.
If is possible, you can enter a small switch between the 3650 and the AP, as transceiver "copper-to-copper", without vlans , no routing, nothing ... just making functions of "repeater". Even there are catalyst switches of the Compact series, with inline-outline power (2960CPD-8PT-L,...). They could receive PoE of the 3650 and gives PoE to the AP, without aditional electrical wire.

Cinema HD Display cable length

Hi,
Does someone know the cable length of these displays ? measured from back of display to end of DVI connector

I have the same problem too with my Apple 30" display (a year old) and my Mac Pro (a month old). It never used to do this and now it does it regularly whenever the macpro goes to sleep. It tries to come on if I play with the keyboard or by clicking with the mouse but the display will not come back on. It is quite a pain in the arse to restart or reboot constantly. Have checked the software and it is up to date, drivers are up to date. Would appreciate any help.
Namaste....
akaimon2
NVIDIA GeForce 7300 GT:
Chipset Model: NVIDIA GeForce 7300 GT
Type: Display
Bus: PCIe
Slot: Slot-1
VRAM (Total): 256 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0393
Revision ID: 0x00a1
ROM Revision: 3011
Displays:
Cinema HD:
Display Type: LCD
Resolution: 2560 x 1600
Depth: 32-bit Color
Core Image: Supported
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Rotation: Supported
Display:
Status: No display connected

Maximum firewire cable length?

Hi there,
Why do firewire cables come at a 6 foot limit? I have a joiner and am able to run my firewire audio device from twice that distance. Will this cause harm?
thanks,
rwa

I guess it should still work: the reason for the cable length limit is probably that the data transfers slightly more slowly when your FireWire cable is longer than six feet.

SX20 endpoint - microphone input 3.5mm? Cable length?

Hello,
Can someone confirm with me that the microphone (CTS-QSC20-MIC) which you can purchase with the SX20 endpoint is connected via a 3.5mm. If not, is it USB? Lastly, how long is the microphone's cable? I don't see any specific details on this microphone on Cisco's site.
Thanks!

Hi,
Yes, the connector is a mini-Jack 3.5mm, 4-pole connector.
The microphone cable length should be 7.5m.

Cable length?

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