Currently unavailable.
We don't know when or if this item will be back in stock.

Have one to sell? Sell on Amazon

Image Unavailable

Image not available for
Color:
  • Keyspan US-4A 4-Port USB Server (12 Mbps)
  • Sorry, this item is not available in
  • Image not available
  • To view this video download Flash Player
      

Keyspan US-4A 4-Port USB Server (12 Mbps)

by Keyspan

Currently unavailable.
We don't know when or if this item will be back in stock.
  • USB device server makes USB devices available to multiple computers on a network
  • Overcomes the 5-meter USB cable limitation, allowing the host computer and the USB devices to be separated by any distance?100 feet, 100 miles or more
  • Provides four USB 2.0 high-speed ports
  • Supports USB printers, scanners, hard drives, keyboards, mice and more
  • Works over both Ethernet and Wi-Fi networks, making it easy to print to a USB printer from a Wi-Fi laptop

Technical Details

  • Brand Name: Keyspan
  • Model: US-4A
  • Hardware Platform: PC
  • Connectivity Technology: usb

Product Details

Data Sheet [499kb PDF]| Product Manual [1.30mb PDF]| Supplementary Guide [120kb PDF]
  • Product Dimensions: 8 x 6.4 x 2.2 inches ; 11.2 ounces
  • Shipping Weight: 11.2 ounces
  • Shipping: Currently, item can be shipped only within the U.S.
  • ASIN: B0001NA3L2
  • Item model number: US-4A
  • Average Customer Review: 3.0 out of 5 stars  See all reviews (32 customer reviews)
  • Amazon Best Sellers Rank: #143,559 in Electronics (See Top 100 in Electronics)
  • Date first available at Amazon.com: June 29, 2004

Product Description

From the Manufacturer

Keyspan by Tripp Lite’s US-4A 4-Port USB Device Server lets you configure USB printers (including multi-function printers), USB scanners, hard drives, keyboard, mice and other USB devices to be used and shared by PCs on a network. The US-4A supports both Ethernet and Wi-Fi networks, making it easy to print to a USB printer or connect to other USB devices from a Wi-Fi laptop. Another great feature of the US-4A is that it overcomes the 5-meter USB cable limitation—you’re free to separate the host computer and the USB devices by any distance—100 feet, 100 miles or more. The US-4A can support up to eight USB devices, with USB 2.0 full-speed data transfer rates up to 12 Mbps. Seven LEDs (three for the system plus one for each USB port) display the US-4A’s operational status. You can tell at a glance if the server is connected to the network, if the server hardware and software are working properly, and which USB ports are currently in use.

Applications
The US-4A is ideal for home offices, small offices, classrooms or any other venue where a need exists to make USB printers and other devices available to networked computers.

US-4A Application

Key Features

Works Over Both Ethernet and Wi-Fi Networks
With the US-4A, there’s no need to physically connect a computer to a printer. It works over both Ethernet and Wi-Fi networks, making it easy to print to a USB printer or connect to other USB devices from any networked computer—even a Wi-Fi laptop.

Supports Multiple Devices
The US-4A is capable of supporting up to eight USB devices, including USB printers, scanners, hard drives, keyboards, mice and more.

US-4A Supports Multiple Devices

Provides Full-Speed Data Transfer
The US-4A’s USB 2.0 ports support data transfer rates up to 12 Mbps, with bi-directional communication between the computer and the USB device, speeding print jobs and other functions across the network.

LED Indicators
Ten LEDs (three system, three network, four for the USB ports) display the US-4A’s operational status. You can tell at a glance if the server is connected to the network, if the server hardware and software are working properly, and which USB ports are currently in use.

System LED Status Modes
LED 1 (Green) Off No power—check power supply
LED 1 (Green) On Server powered and booted up
LED 1 (Green) Blinking Server working
LED 1 (Green) Blinking LED 2 or 3 (Red) Blinking Firmware error—contact tech support

USB Port LED Status Modes
LED (Green) Off No power—check power supply
LED 1 (Green) On Server working/port active
LED 1 (Green) Blinking USB device not supported/communications failure

Free Software Upgrades
Need to update the US-4A’s software? The process is quick and simple with free software downloads. Simply visit the US-4A’s product page on Tripp Lite’s website, click on the Help & Downloads tab and select your desired software download.

What’s in the Box

US-4A Package

Package Contents
US-4A Server
Power supply
CD with driver software and owner’s manual
Quick Start Guide
2-year warranty

Technical Specifications
Connector A: RJ45 (FEMALE)
Connector B: USB A (FEMALE) x 4
Autosensing: 10/100
LEDs: 1 Green, 2 Red (System) 4 Green (USB Ports)
IP Addressing: Static/DHCP/ZeroConfig
Data Transfer Rate: Up to 12 Mbps

System Requirements
(Windows®)
Windows 2000/XP
(Macintosh®)
Mac OS X (v10.3 or later)

Product Description

Connect USB devices to a PC or Mac via a wired or wireless LAN. Much like a print server, this USB Server enables attached USB devices to be used and shared by client PCs on a LAN (Local Area Network). In addition to printers, the USB Server supports ...

Customer Questions & Answers

Customer Reviews

It does not work well with external hard drives.
Lee's Collection
I would strongly suggest anyone thinking about buying this product to read the article.
R H
Several emails to Keyspan customer support have gotten NO RESPONSE.
C. W. Ellis

Most Helpful Customer Reviews

44 of 46 people found the following review helpful By Brian Fuchs on June 18, 2004
Verified Purchase
I opened the packing box 10 MINUTES AGO, and both of my printers are up and running on every PC.
I was a little worried when I saw the 'documentation' was smaller than a CD, but everything went off without a hitch:
Step 1: Power up the USB server with no USB device hooked up to it, and connect it to the network via RJ45.
Step 2: Install the software (if WinXP, use the unsigned drivers). Your OS searches the network at this time and finds the USB Server.
Step 3: Hook up your USB devices.
THAT'S IT!!!
If you have a Multi-Function printer, you NEED this device, because even if you find a compatible print server, it will only let you use the print function. A Printer Server turns your Multi-Function printer into a Uni-Function Printer.
With this device, it will be just as if the printer were directly connected to your PC. In fact, you are not limited to PCs; you can connect ANY USB device to it (camcorder, scanner, webcam, even a mouse or keyboard).
The ONLY advantage that a print server has over this device is that with a server, multiple PCs can control a target device at once (really, that's not quite true, since the requestes are put in a queue).
With the USB server, every PC uses a little administration program. When launched, it opens a window that lists all of the devices that are connected to the USB server. A PC on the network that wants to use a device (i.e. print) needs to first take command of that device. You just select the device by name, and hit the connect button. From that point on, it's as if the printer were plugged directly into your PC. Others trying to use the printer would see that you were subscribed to it; they would have to wait until you release the subscription - which you have to do manually.
Read more ›
1 Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback. If this review is inappropriate, please let us know.
Sorry, we failed to record your vote. Please try again
16 of 17 people found the following review helpful By R H on October 17, 2005
Despite the rave reviews for this product, I'm a bit more skeptical. I recently purchased an HP LaserJet 3015 MFC and wanted to use this device to connect to our office network. A couple of thoughts:

1. Toms Networking does a comparison between this product and Silex's SLX SX1000U. I would strongly suggest anyone thinking about buying this product to read the article. The article can be found at:

[...]

2. Although Silex's product only has one USB port, you *can* connect a USB hub to support up to 15 devices. The KeySpan device supports 4 devices, but you cannot add more devices.

3. I found that the unit would experience problems if I submitted a print job greater than 7 MB through the KeySpan. I reset the printer and nothing got fixed. Only when I power cycled the KeySpan did things work. I am using the latest version, v1.3.1, which also upgrades the KeySpan firmware.

4. Toms Hardware also reports that it would crash with several different devices. I read on other web sites that the Keyspan software causes the blue-screen-of-death (IRQ_LESS_THAN_EQUAL errors), so I tend to believe that the problem is caused more by the Keyspan drivers than the HP ones.

5. In some parts of its web site, KeySpan advertises that this unit supports USB v2.0, but if you read the fine print it's supporting at USB v1.1 speeds.

6. I discussed with KeySpan about connecting external hard drives. This unit is really meant for multi-function printers and cannot support external HD's.

7. I decided to return this product and try out the Silex instead. Although there is a lot of potential for this device, I would not suggest it for enterprise environments. I read the glowing Amazon reviews but would put more skepticism about their comments now that I have tried it for myself.

8. I will update this review later when I have a chance to try the Silex unit.
Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback. If this review is inappropriate, please let us know.
Sorry, we failed to record your vote. Please try again
19 of 21 people found the following review helpful By Brian Fuchs on June 18, 2004
Verified Purchase
It's been 10 minutes after I posted my last review...
In that time, I have installed the latest software and updated the firmware. The two really took me about 5 minutes.
The update adds a nice feature for single-PC networks. If a device is labeled a single-user device, then you don't need to take control of it every time you want to use it.
I also found out that it is possible to boot others off the server (actually everyone).
If you go to the Admin tab on the server SW, and edit the server settings (something simple like a password change), it will reboot the hardware (not your PC), which will disconnect all shared devices. This is a rather brute-force approach, but the manual doesn't indicate any other way.
Even after an extra 10 minutes of use, I think this device is the best thing since a USB thumb drive (which you can connect to the server as well).
This thing is just TOO COOL!!!!
- end of gushing -
1 Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback. If this review is inappropriate, please let us know.
Sorry, we failed to record your vote. Please try again
8 of 8 people found the following review helpful By BW on December 15, 2005
I've had one of these for a year or so now and it's a great product - recommended. It definitely does support external hard disks, and most other things I've plugged into it.

My setup is:

Wireless network from laptop to Netgear wireless router/ADSL modem

USB server plugs into one of the network ports on the router

USB devices that work fine:

- HP multifunction printer/scanner

- Western Digital 120GB USB hard disk

- Old Palm III cradle, plugged through a Gembird serial-USB adaptor cable

- digital camera USB

It's not perfect and the s/ware is a bit flaky at times, but since downloading the latest s/ware and firmware it's much better than it was initially - now generally pretty stable.

Issues I've had (all these happened more often with the earlier s/ware than they do now):

- occasionally printing or transferring v. large files will crash

- occasionally the laptop won't connect to the USB server on boot up, and the USB server needs to be power cycled to fix. (but then I have to power cycle my router too periodically...)

- scanner works other than the 'scan' button on the scanner itself, which is meant to launch the scan dialog on the PC when pressed. You have to invoke the scan dialog from the laptop.

- It is USB 1.1 so transferring huge files is slow. For video editing I plug the HDD directly into my laptop, but for most other stuff it's perfectly usable across the network.

- USB hubs are still not supported, I think, so you are limited to 4 devices at once.

If you can live with the limitations and occasional glitches, which I certainly can, it's a great device that does exactly what I'd been looking for for ages, which is wireless access to USB devices.
1 Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback. If this review is inappropriate, please let us know.
Sorry, we failed to record your vote. Please try again

Customer Images

Most Recent Customer Reviews

Search