Computer Wiz – iBurst

Looking for either 5m or 10m coax to extend your existing iBurst Omni directional antenna ?

The connectors used are sma male to sma female specifically for the HDF 195 coax.

This should work for the omni directional iBurst antenna or the Flat panel iBurst antenna.

The cable is expensive and there are alternative ways in obtaining the same results.

Use cat 5 ethernet cable in place of the coax.

Give Computer Wiz a call and we will guide and assist you on the best way to install your iBurst external antenna.

Costing of cat 5 ethernet cable is R50 per 5 meters versus the R200 excluding shipping for the coax.

Computer Wiz
Tel: 0861114731
Cell: 084 585 8885
Fax: 0865242436
email: iburst@computerwiz.co.za
www.computerwiz.co.za

iBurst requires that your MTU be set to a size of 1352 on your operating system namely Windows XP or if using Vista unless you are using an Apple Mac in which case it must also be set.

Do not forget that the MTU must be set on your router and Linux machine if you are using additional equipment on your network.

Before being able to explain MTU  it helps if we have a basic understanding of how data is transmitted.

Networks use certain protocols to send and receive data.

TCP or Transmission Control Protocol is one of the core protocols in the Internet suite as it provides a means of reliably sending data between two connections.

How its able to guarantee a reliable connection is through its use of acknowledgements or ACK from the receiving system.

When someone sends you data this is broken up into small packets the host will send a packet of data which then requires an acknowledgement from the receiving system.

Once the sender has received an ACK it will continue to send the next packet of data. If for any reason an ACK is not received the host will wait for a short period of time before trying to retransmit.

This constant chatter of stop and start between the 2 connections ensures that all packets are received in the correct order.

Maximum Transmission Unit  or MTU

The MTU is the maximum amount of data (packet size) that can be transmitted in one go before it has to be cut up into smaller chunks. Each network has a maximum limit of data size it can cope with before data is fragmented into smaller packets. This figure may vary from network to network.

If you are using your iBurst Broadband connection to establish VPN connections then you must set the MTU size to 1324.

Vista needs to have the MTU set to 1352 when using iBurst and the following commands could be used in combination with a batch file that could be enabled or run after the iBurst connection has been made.

The following command could be used to disable the automatic MTU function within Vista.

Click start

Find command prompt

Right-click command prompt and click Run As Administrator

Type: netsh int tcp set global autotuninglevel=disabled

Press enter

Now run your batch file and  observe your MTU settings.

The commands displayed below must be used in your batch file.

netsh interface ipv4 set subinterface “iburst” mtu=1352 store=persistent

netsh interface ipv4 show subinterfaces

The above has been tried and tested with great success on a Vista machine.

Webpages load correctly and are fully displayed.

Computer Wiz

Tel: 0861114731

Cell: 084 585 8885

Fax: 0865242436

email: iburst@computerwiz.co.za

http://www.computerwiz.co.za

The upload and download  speed of your data on the iBurst network works as follows:

• Upload  at a maximum of 275 kbps.
• Download at a maximum of 1024Mbps.
• The above speeds will vary based on your iBurst signal strength.
• Our advice is to confirm your speed by performing a speed test on the iBurst website.
• Make sure you have downloaded and installed Java before running the speed test.
• If your upload and download speeds are not very good then order an Omni Antenna.
• Make sure you have run Dr TCP on your computer and set your MTU to 1352.
• Your speed will be reduced by about 5 to 10 percent on overcast days.
• If you ping iburst.co.za the responce time should be about 75 to 125 ms.
• Perform the ping command about 5 times to obtain an average.
• A ping to google.co.za should be in the range of 300 to 400ms.
• If you need iBurst support to improve your transfer speeds you could phone the helpdesk alternatively give us a call and we could provide you with the required telephonic support for as little as R250.
• No improved result means we do not invoice you.

Computer Wiz
Tel: 0861114731
Cell: 084 585 8885
Fax: 0865242436
email: iburst@computerwiz.co.za
www.computerwiz.co.za