Re: remote site access iSeries via dsl

Any recommends for a decent dsl router supporting vpn?
Or should it be separate from the dsl. Phone co wants to give
us a very cheap Netopia 4 port.
jim

To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Sent: Tuesday, January 23, 2007 8:08 AM
Subject: RE: remote site access iSeries via dsl

Back in the day, we used to put 30+ users plus a few line printers (text
+ barcode) on 19.2Kb leased lines.


Formula:
Bandwidth = ScreenSize * Screens/Minute * ConcurrentUsers

ScreenSize: A 5250 screen maxes out at about 4KB.  That's actually
download size; uploads IIRC only get the new field data + key stroke
used (F-key, Enter, etc.) so the average upload is more likely to be
under 1KB.  I'll use 4KB as a worst-case.
Screens/Minute: Not sure; assuming 5 on average.
ConcurrentUsers: 5

Bandwidth = 4KB * 5 Screens/Minute * 5 = 100KB/minute

Convert that to the bandwidth measurement units from your DSL provider:

100KB/minute * 1 minute/60 seconds * 8Kb/KB = 13.3 Kb/s


You will probably have more to worry about from media streaming, P2P
file sharing, & other inappropriate uses than the iSeries stuff.

--
John A. Jones, CISSP
Americas Information Security Officer
Jones Lang LaSalle, Inc.
V: +1-630-455-2787 F: +1-312-601-1782
john.jones@xxxxxxxxxx

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Scott Klement
Sent: Tuesday, January 23, 2007 1:58 AM
To: Midrange Systems Technical Discussion
Subject: Re: remote site access iSeries via dsl

Hi Jim,

How many users in a remote office can one reasonably support with a
business dsl circuit 3.0 mbps downstream and 384 kbps upstream?
Each pc using Client Access (telnet).

Only telnet?  No file transfer?  No web?  No ODBC? No E-mail? Is that
correct?

You should be able to handle quite a lot of users in that case. I'd say
50 or so.

That assumes that the 384 speed is the upload speed from the iSeries to
the user.  If the 3.0 mbps is the upload speed, I'd say you can handle a
lot more users.  200 users easily over a 3 megabit upload speed.

Now, if the users will be doing anything that requires sustained network
traffic (ODBC, file transfers, etc) then the numbers will come way down.

But for 5 users, it should still be more than enough.


--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing
list
To post a message email: MIDRANGE-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.

This email is for the use of the intended recipient(s) only. If you have received this email in error, please notify the sender immediately and then delete it. If you are not the intended recipient, you must not keep, use, disclose, copy or distribute this email without the author's prior permission. We have taken precautions to minimize the risk of transmitting software viruses, but we advise you to carry out your own virus checks on any attachment to this message. We cannot accept liability for any loss or damage caused by software viruses. The information contained in this communication may be confidential and may be subject to the attorney-client privilege. If you are the intended recipient and you do not wish to receive similar electronic messages from us in the future then please respond to the sender to this effect.

--

This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list

To post a message email: MIDRANGE-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.