Network performance, high latency?

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From: Niklas (ngrop_at_yahoo.se)
Date: 02/01/04 

Date: Sun, 1 Feb 2004 19:24:49 +0100

Hi,

I have a headquarter with a 1mbit line to the Internet.
I have two remote offices, one with a 200kbit line and the
other 512kbit line.

There are 5 pc/terminalusers on each remote office.

What I've read is that a TS client would use 30kbit bandwidth, but in our
scenario it couldnt be true...

I have locked down the TS clients so they are only using 15bit colors, no
printer/disk/etc attachments and no sound. Everything is locked down to the
minimum.
Only bitmap caching is enabled.
They are all running RDP 5.2 clients
The server is a Windows 2003 server with 1GB ram and 2,4 XEON CPU.
RAID 5 diskset.

OK, the 200kbit remote office could be near the maximum bandwidth, which
could be the
cause of the high latency...

But, the 512kbit remote office has also a very high latency.
When I mean high I mean 600-1000ms when everyone in the remote office (5
people) are working.

The users who work at the HQ has no problems with the performance on the TS
Server...
So it must be a network problem.

What I guess is that the remote office has a very high latency, but why?
5 users x 30kbit/user = a bandwidth of 150kbit.
It should be enough with 512kb.

No other network communication are allowed through the firewall, so no other
application could "eat" the bandwidth on the remote offices.

We have noticed that the latency rises fast when browsing the Internet (on
sites with
alot of high grafix/pictures).

Do anyone have any experiance with "low bandwidth" networks, latency and
Terminal Server?
What could we do to get better performance?

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