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What can I do to prevent latency problems between that cause characters not to appear on the screen for several seconds during a terminal server session (see body)

What can I do to prevent latency problems between that cause characters not to appear on the screen for several seconds during a terminal server session.

Our organization currently has the Windows Server 2003 terminal servers located in one office.

Then when users at other offices connect to the terminal servers using Remote Desktop and type characters onto the screen, they have to wait several seconds for the characters to appear.

Although all five of our office are only a couple blocks away from each other, they share their network connection via a WAN connection that uses the internet as a VPN.

We need to prevent this latency issue.

What can we do to fix this problem?
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B HCommented:
you have to increase the download speed at the servers, and increase the upload speed at the users
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QlemoDeveloperCommented:
You can
  • increase the link speed, as already mentioned
  • reduce the bitdepth of the desktops to 8 (256 colors) and or resolution
  • prevent big images (desktop background, web pages aso.) to be transmitted via RDP. Desktop background can be switched off in RDP/TS settings, but better to remove them completely.
  • priorize RDP traffic over Internet traffic, if the WAN routers are capable of policy based traffic shaping.
  • use a WAN traffic optimizing device. There are several out there which speed up especially RDP/ICA by implementing caching, better compression and the like.
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bwilks99Commented:
Hi, all of the above are good suggestions.

Before you go increasing the links I would make sure it is a network problem as very high cpu utilization can cause the problem described.

I have experienced this with our users when an app has crashed and the cpu is running at 90% to 100%.

Also you need to look at the link utilization and what type of traffic. Are users doing big downloads all day long flooding the link with non work related traffic?

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QlemoDeveloperCommented:
That's true, besides the bitdepth and big images points, which can checked out immediately, you should first do some analysis to get an idea of the bottleneck. In particular before you do some big money decisions ...
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