Question about 3Com (3C16593BN) 24-Port Ethernet Hub

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Hub not working properly

The hub is not working properly unless I connect a certain cable

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Maybe your hub port is not using auto sense port.

Posted on Oct 04, 2008

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Maybe you hub port is not auto sense.

Posted on Oct 04, 2008

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Reconecting the cables to the hub does not make a network


Not necessarily! As long as a lan cable is connected on the wan port of your hub and the other end goes directly to the modem, the connection is correct. The remaining port will be left for the lan cables of the computers. No orders needed. Just make sure that lan cables was properly seated on the port. The LED blinking in the hub will tell you if its working or communicating with your computer. Find it, when the LED is not lit or blinking, the lan cable is not connected properly on the hub (or the other end of the lan cable is disconnected from the lan card of the computers).

If all cables are connected properly and still cannot connect to the network, you may need to refresh the name of the workgroup on the computers that cannot connect on the network,

How? Right click on My Computer.
Select Computer Name
Click Change to change the name of the workgroup that is being use by other computer. Delete the old name if the same and retype.
Restart the computer and try to connect using network neighborhood.

Jul 07, 2010 | D-Link DSH 16 (DSH-16) Networking Hub

1 Answer

4 port HUB is connected. My computer doesn't show it. Help! It is all plugged in with USB cable and when I go to MY COMPUTER it doesn't show.


The hubs usually show up in the hardware list and not as a seperate device. Only way to know it is there is to plug a usb device into it.

I devised these simple steps that tend to remedy quite a few issues with most USB portable / external hard drives and devices (though not always)

A few things to check but assumes USB and Windows for other interfaces / operating systems similar steps may be adapted to suit.

1. Ensure it is connected directly to the computer to a USB 2.0 port not a USB 1.0 port as this can have effects on performance and reliability

2. Use only the cables that came with it NOT one that fits that may have been lying around or is longer. Not all USB cables are equal even though they should be)

3. Do not connect through an external USB HUB unless that hub is USB 2.0 AND has its own power supply.

4. Use ONLY the power supply that came with it if it has an external power supply Don’t use any other unless you know it has both the same voltage and current rating e.g. 12V 500mA anything rated below that would not work properly.

5. Always use the same port for connecting your devices. Some devices do not like being switched about. If switched they may want to install software / drivers again. This can be especialy true if you move a HUB to another port

If you checked and fixed anything there and still have issues then check your hardware from CONTROL PANEL / SYSTEM / HARDWARE.
Any exclamation marks by hardware need fixing before you investigate any further

Sep 05, 2009 | CyberPower CPH420P 4-Port USB Hub

1 Answer

Usb ports not working


Check your hardware from CONTROL PANEL / SYSTEM / HARDWARE.

Also check HP's support section on the web for any updated drivers especially for your laptops motherboard / bios

Any exclamation marks by hardware need fixing before you investigate any further
Once you have done that try some of the common fixes below.

I devised these simple steps that tend to remedy quite a few issues with most USB portable / external hard drives and devices (though not always)

A few things to check but assumes USB and Windows for other interfaces / operating systems similar steps may be adapted to suit.

1. Ensure it is connected directly to the computer to a USB 2.0 port not a USB 1.0 port as this can have effects on performance and reliability

2. Use only the cables that came with it NOT one that fits that may have been lying around or is longer. Not all USB cables are equal even though they should be)

3. Do not connect through an external USB HUB unless that hub is USB 2.0 AND has its own power supply.

4. Use ONLY the power supply that came with it if it has an external power supply Don’t use any other unless you know it has both the same voltage and current rating e.g. 12V 500mA anything rated below that would not work properly.

5. Always use the same port for connecting your devices. Some devices do not like being switched about. If switched they may want to install software / drivers again. This can be especialy true if you move a HUB to another port

Aug 30, 2009 | HP GbE2c Layer2/3 Ethernet Blade Switch...

2 Answers

How to check whether its working or not working?


If your PC LAN Card is active just connect the switch with Straight cable - & --you will see one yellow box in ritht side corner down to monitor screen...where the time appears.....also you can check in the Network Connections Folder. Or Right Click My Network Places> Properties> You will see local area Network....> Connected...then it is working if disconnected it's not working....Good Luck

Jul 29, 2009 | D-Link DES-1008D 8-Port Ethernet Switch...

1 Answer

3com 8 port hub not connecting to 2nd pc


Be sure that when you say its a hub that is indeed a layer 1 device which is just passing the signal and data along to all ports. Be sure to check the cable on the second device. At this point it must a straight cable you use to connect the PCs to the Hub. PCs transmit on pins 1 & 2 and Receive on 3 & 6. Hubs are the opposite. So a crossover will not work. You need PC pin 1 & 2 Tx to Hub Pin 1 & 2 Rx and over to PC pin 3 & 6 Rx to Hub pin 3 and 6 Tx. Tx = transmit and Rx = Receive. Also assign an IP address on each machine that is in the same subnet as each other. Such as PC1 192.168.1.100 mask 255.255.255.0 and PC2 IP address as 192.168.1.101 Subnet Mask 255.255.255.0 This way the 192.168.1 is the same for 8 PCs and the only change is the last number (octet). Also keep the speeds at either 10/100/1000 what ever the product is rated for but always keep the duplex half. Half is good because on a layer 1 hub, everyone is broadcasting at the same time. So you have to have half of all the ports listening at all times.

I hope this helps. My advice is to buy a layer 2 switch.

Mar 18, 2009 | 3Com OfficeConnect TP800 8-Port Ethernet...

1 Answer

Iogear 4 port USB 2.0 HUB (Model GUH285) now working properly


I think it clearly states that the device is defective.... you need to call IOGEAR for RMA if its still under warranty

Jan 25, 2009 | IOGear 4 Port Hi-Speed USB 2.0 Hub

1 Answer

SMC ethernz problem


Typically you will connect your router to port 1 of the switch. Unless you have a port that is labeled WAN or Uplink. Then you would use that.

Daisy chain is when you have multiple switches connected to eachother. So it would be router to port 1 computers on ports 2-15, port 16 would connect to port 1 on another switch, and so on.

Jul 20, 2008 | SMC EtherEZ Networking Hub

2 Answers

3 com hub tp4 home network setup failure


There are several possible problems here, and more information is needed to identify which one is causing trouble. First, are you using a high speed dsl or cable internet connection? ...or is your Internet connection a dial-up phone line? This will have a significant effect on how your cables should be connected between the hub and the computers. Windows typically defaults to a 169... address when it is not properly connected to a shared network connection.

Jan 08, 2008 | 3Com HomeConnect (3C19261) 5x10/100 Mbps...

1 Answer

Pc's say a network cable is unplugged


First, NO, crossover cables are for connecting LIKE devices.. you need a Straight Thru cable for connecting 2 PCs to a switch.. So, if you are using Crossovers, then you are getting the correct results (cable unplugged). Replace with the proper cables, and it should see the network fine..

Also,

As this ProCurve HP 408 is 10/100 auto sensing, you should be able to automate speed and duplex within your NICs conifiguration...

Happy Holdiays!

Dec 22, 2007 | HP ProCurve 408 Networking Switch

6 Answers

Networking


This site will give you directions on how to make a CAT5 cable. http://www.computerhope.com/issues/ch000639.htm

Sep 17, 2007 | Networking Hubs & Switches

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